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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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 Posted: Sat Feb 02, 2013 12:24 pm Post subject: injector tuning |
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I'm starting down the road of changing injector restrictors to bring all the peak EGT's into line. Two questions:
Most of the posts seem to be going to smaller injectors. Is there any reason not to go oversize? My two worst outliers are peaking last, I'd like to flow more thru them.
If instead I tried to go the other way, going undersize on the other 4 cylinders needing less fuel, is anyone concerned about maintaining adequate full throttle fuel flow? Or is this not an issue?
Stock XIO-540D4A5 from Vans.
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Bob Turner
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carl.froehlich(at)verizon
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| Posted: Sat Feb 02, 2013 1:12 pm Post subject: injector tuning |
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Bob,
If a cylinder is peaking last, that implies it is getting more fuel than the
other cylinders. To make a cylinder peak earlier (as compared to the other
cylinders) you put a slightly smaller injector in that cylinder to reduce
fuel flow.
One trick you may want to try first; swap your first to peak cylinder
injector with your last to peak cylinder injector. This might be just
enough change to get the cylinders all peaking at about the same fuel flow.
Carl
--
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Tim Olson
Joined: 25 Jan 2007
Posts: 2881
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| Posted: Sat Feb 02, 2013 1:39 pm Post subject: injector tuning |
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Going larger will make them peak even later...
Also, AFP often starts for other reasons with going all smaller and working from there.
Tim
On Feb 2, 2013, at 2:24 PM, "Bob Turner" <bobturner(at)alum.rpi.edu> wrote:
| Quote: |
I'm starting down the road of changing injector restrictors to bring all the peak EGT's into line. Two questions:
Most of the posts seem to be going to smaller injectors. Is there any reason not to go oversize? My two worst outliers are peaking last, I'd like to flow more thru them.
If instead I tried to go the other way, going undersize on the other 4 cylinders needing less fuel, is anyone concerned about maintaining adequate full throttle fuel flow? Or is this not an issue?
Stock XIO-540D4A5 from Vans.
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393458#393458
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amekler
Joined: 07 Oct 2010
Posts: 164
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| Posted: Sat Feb 02, 2013 2:17 pm Post subject: injector tuning |
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After spending many months with GAMI and never getting it right I went with Don Rivera at airflow performance. Don knows his stuff. He will look at your fuel flows and pressure at full throttle. I needed my flow divider recalibrated and he took care of this as well. Cylinders that peak last are too rich and will need restrictors.
Alan
N668G
On Feb 2, 2013, at 3:24 PM, "Bob Turner" <bobturner(at)alum.rpi.edu> wrote:
| Quote: |
I'm starting down the road of changing injector restrictors to bring all the peak EGT's into line. Two questions:
Most of the posts seem to be going to smaller injectors. Is there any reason not to go oversize? My two worst outliers are peaking last, I'd like to flow more thru them.
If instead I tried to go the other way, going undersize on the other 4 cylinders needing less fuel, is anyone concerned about maintaining adequate full throttle fuel flow? Or is this not an issue?
Stock XIO-540D4A5 from Vans.
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393458#393458
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rv10pro(at)gmail.com
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| Posted: Sat Feb 02, 2013 2:25 pm Post subject: injector tuning |
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Airflow Performance's twice yearly classes are invaluable opportunities to improve performance, safety and save fuel (money). I agree Mr. Rivera and his wife were wonderful.
Your engine will love them too.
John Cox (from the opposite side of this country) On Feb 2, 2013 2:19 PM, "Alan Mekler MD" <amekler(at)metrocast.net (amekler(at)metrocast.net)> wrote:[quote] --> RV10-List message posted by: Alan Mekler MD <amekler(at)metrocast.net (amekler(at)metrocast.net)>
After spending many months with GAMI and never getting it right I went with Don Rivera at airflow performance. Don knows his stuff. He will look at your fuel flows and pressure at full throttle. I needed my flow divider recalibrated and he took care of this as well. Cylinders that peak last are too rich and will need restrictors.
Alan
N668G
On Feb 2, 2013, at 3:24 PM, "Bob Turner" <bobturner(at)alum.rpi.edu (bobturner(at)alum.rpi.edu)> wrote:
> --> RV10-List message posted by: "Bob Turner" <bobturner(at)alum.rpi.edu (bobturner(at)alum.rpi.edu)>
>
> I'm starting down the road of changing injector restrictors to bring all the peak EGT's into line. Two questions:
>
> Most of the posts seem to be going to smaller injectors. Is there any reason not to go oversize? My two worst outliers are peaking last, I'd like to flow more thru them.
>
> If instead I tried to go the other way, going undersize on the other 4 cylinders needing less fuel, is anyone concerned about maintaining adequate full throttle fuel flow? Or is this not an issue?
>
> Stock XIO-540D4A5 from Vans.
>
> --------
> Bob Turner
> RV-10 QB
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=393458#393458
>
>
>
>
>
>
>
>
>
>
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Sat Feb 02, 2013 6:42 pm Post subject: injector tuning |
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Your cylinders that are peaking last are your richest. You want them leaner..smaller injector orifice.
On Sat, Feb 2, 2013 at 1:24 PM, Bob Turner <bobturner(at)alum.rpi.edu (bobturner(at)alum.rpi.edu)> wrote:
[quote]--> RV10-List message posted by: "Bob Turner" <bobturner(at)alum.rpi.edu (bobturner(at)alum.rpi.edu)>
I'm starting down the road of changing injector restrictors to bring all the peak EGT's into line. Two questions:
Most of the posts seem to be going to smaller injectors. Is there any reason not to go oversize? My two worst outliers are peaking last, I'd like to flow more thru them.
If instead I tried to go the other way, going undersize on the other 4 cylinders needing less fuel, is anyone concerned about maintaining adequate full throttle fuel flow? Or is this not an issue?
Stock XIO-540D4A5 from Vans.
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393458#393458
===========
arget="_blank">http://www.matronics.com/Navigator?RV10-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
[b]
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Kelly McMullen
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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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| Posted: Sat Feb 02, 2013 7:14 pm Post subject: injector tuning |
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Hmm, I've only heard one other negative report on GAMI, and in that case
the individual wasn't working closely enough to give GAMI the needed
data and doing the flight testing called for to get needed data for
adjustments. I don't know on 6 cyl Lyc engines, but on the 4 cyl
injected Lycs, more than 50% of time no injector adjustment is needed.
On 2/2/2013 3:16 PM, Alan Mekler MD wrote:
| Quote: |
After spending many months with GAMI and never getting it right I went with Don Rivera at airflow performance. Don knows his stuff. He will look at your fuel flows and pressure at full throttle. I needed my flow divider recalibrated and he took care of this as well. Cylinders that peak last are too rich and will need restrictors.
Alan
N668G
|
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No virus found in this message.
Checked by AVG - www.avg.com
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Kelly McMullen
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arplnplt(at)gmail.com
Guest
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| Posted: Sat Feb 02, 2013 8:19 pm Post subject: injector tuning |
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As you increase the size of the injectors, the pressure drops in the fuel system behind them causing uneven flow between them. Decreasing the size increases the pressure behind them and evens out the flow between them.Increase the size of one makes it richer, but it will decrease the pressure to the others possibly making them leaner. It is a balaning act.
David Leikam
On Feb 2, 2013, at 9:13 PM, Kelly McMullen wrote:
[quote]--> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>
Hmm, I've only heard one other negative report on GAMI, and in that case the individual wasn't working closely enough to give GAMI the needed data and doing the flight testing called for to get needed data for adjustments. I don't know on 6 cyl Lyc engines, but on the 4 cyl injected Lycs, more than 50% of time no injector adjustment is needed.
On 2/2/2013 3:16 PM, Alan Mekler MD wrote:
| Quote: | --> RV10-List message posted by: Alan Mekler MD <amekler(at)metrocast.net (amekler(at)metrocast.net)>
After spending many months with GAMI and never getting it right I went with Don Rivera at airflow performance. Don knows his stuff. He will look at your fuel flows and pressure at full throttle. I needed my flow divider recalibrated and he took care of this as well. Cylinders that peak last are too rich and will need restrictors.
Alan
N668G
|
-----
No virus found in this message.
Checked by AVG - http://www.matronics========================[b]http://www.matronics.com/co=================
[b]
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Bob Turner
Joined: 03 Jan 2009
Posts: 885
Location: Castro Valley, CA
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| Posted: Sat Feb 02, 2013 8:29 pm Post subject: Re: injector tuning |
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Okay, I've got dyslexia. I should have said my worst two outliers peak first, not last.
So again, why does AFP prefer to go smaller on four rather than larger on two? Is there any concern with not reducing fuel flow at full power?
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Bob Turner
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amekler
Joined: 07 Oct 2010
Posts: 164
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| Posted: Sun Feb 03, 2013 5:02 am Post subject: injector tuning |
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Bob,
Before changing injectors I recommend you check your flow divider and the lines and check for any intake leaks(on the leaner cylinders)
then go to http://www.airflowperformance.com and contact Don with your flight data.
Alan
On Feb 2, 2013, at 11:29 PM, "Bob Turner" <bobturner(at)alum.rpi.edu> wrote:
| Quote: |
Okay, I've got dyslexia. I should have said my worst two outliers peak first, not last.
So again, why does AFP prefer to go smaller on four rather than larger on two? Is there any concern with not reducing fuel flow at full power?
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393483#393483
|
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flying-nut(at)cfl.rr.com
Guest
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| Posted: Sun Feb 03, 2013 6:03 am Post subject: injector tuning |
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Excellent advice. To answer the question though ...... making the two
'offenders' orifice smaller may make them too lean to start with. There
was a thread some time ago (I have a few lists  ) where that happened
... right out of the box they had a too-lean situation and going with
the fuel-flow data suggested smaller orifices on the offending cylinders
which made things worse. They ended up installing larger injectors and
re-working the data. Don't remember whether they were AFS injectors for
Lycs factory ones .......
Linn
On 2/3/2013 8:01 AM, Alan Mekler MD wrote:
| Quote: |
Bob,
Before changing injectors I recommend you check your flow divider and the lines and check for any intake leaks(on the leaner cylinders)
then go to http://www.airflowperformance.com and contact Don with your flight data.
Alan
On Feb 2, 2013, at 11:29 PM, "Bob Turner" <bobturner(at)alum.rpi.edu> wrote:
>
>
> Okay, I've got dyslexia. I should have said my worst two outliers peak first, not last.
>
> So again, why does AFP prefer to go smaller on four rather than larger on two? Is there any concern with not reducing fuel flow at full power?
>
> --------
> Bob Turner
> RV-10 QB
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=393483#393483
>
>
-----
No virus found in this message.
Checked by AVG - www.avg.com
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bill.peyton
Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO
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| Posted: Sun Feb 03, 2013 6:18 am Post subject: Re: injector tuning |
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I just went through this with Kyle (at) AFP. AFP believes that it is best to change out all your injector restrictors to .026 or .027 depending on your spread. The stock injection system usually comes with .028. I chose not to do that since I had 2 that were peaking last and thus required a smaller orifice. I recorded data and downloaded it to Savvy.com (my.savvyanalysis.com/home) for analysis. I changed out the two rich restrictors to .0275, which brought them in to line with the rest. I had one that peaked first and tried switching to .0285, which did not work at all, so I removed it a settled for having a .3 - .4 spread, which allows me to get to 35 LOP smooth operation. This summer I plan on flying over and seeing Kyle and Don to have them all replaced a tweaked a little closer. I can tell you that you will have to take multiple readings and you have lean very very slowly. Kyle suggests that when they fly with you that they take 10-15 minutes to run a single lean test.
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Aviation Partners, LLC |
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Dick Sipp
Joined: 11 Jan 2006
Posts: 215
Location: Hope, MI
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| Posted: Sun Feb 03, 2013 6:25 am Post subject: injector tuning |
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We had a very similar experience with AFP and a stock 260HP IO-540. After two iterations with “std size†injectors we went one overall size smaller and then rebalanced.
Don said 260 HP was about the point where all the injectors go up one size. Sorry I don’t have access here to the actual sizes we ended up with. As part of the process, full power fuel flow was checked to insure rich enough at takeoff. As previously noted Don’s school and work are outstanding.
Dick Sipp
N110DV 450 hours
From: David Leikam (arplnplt(at)gmail.com)
Sent: Saturday, February 02, 2013 11:19 PM
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Subject: Re: injector tuning
As you increase the size of the injectors, the pressure drops in the fuel system behind them causing uneven flow between them. Decreasing the size increases the pressure behind them and evens out the flow between them. Increase the size of one makes it richer, but it will decrease the pressure to the others possibly making them leaner. It is a balaning act.
David Leikam
On Feb 2, 2013, at 9:13 PM, Kelly McMullen wrote:
| Quote: | --> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>
Hmm, I've only heard one other negative report on GAMI, and in that case the individual wasn't working closely enough to give GAMI the needed data and doing the flight testing called for to get needed data for adjustments. I don't know on 6 cyl Lyc engines, but on the 4 cyl injected Lycs, more than 50% of time no injector adjustment is needed.
On 2/2/2013 3:16 PM, Alan Mekler MD wrote:
| Quote: | --> RV10-List message posted by: Alan Mekler MD <amekler(at)metrocast.net (amekler(at)metrocast.net)>
After spending many months with GAMI and never getting it right I went with Don Rivera at airflow performance. Don knows his stuff. He will look at your fuel flows and pressure at full throttle. I needed my flow divider recalibrated and he took care of this as well. Cylinders that peak last are too rich and will need restrictors.
Alan
N668G
|
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No virus found in this message.
Checked by AVG - http://www.matronics========================http://www.matronics.com/co=================
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| Quote: | [b]
href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List
href="http://forums.matronics.com">http://forums.matronics.com
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partner14
Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas
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| Posted: Sun Feb 03, 2013 7:01 am Post subject: injector tuning |
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When discussing this it would have been nice to know the actual numbers you came up with. GPH for each cyl when reaching LOP. Having those would have made this thread a little shorter.
Just an FYI....Although my experience may be different than some, what I can tell you is that there sure seem to be a few variables out there.... altitude, MP, RPM, wind direction, BP, and maybe most important, how long it's been since your last injector cleaning. When the previously mentioned change, the LOP numbers may also change.
Don McDonald
--- On Sat, 2/2/13, Bob Turner <bobturner(at)alum.rpi.edu> wrote:
[quote][b]
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cooprv7(at)yahoo.com
Guest
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| Posted: Sun Feb 03, 2013 10:01 am Post subject: injector tuning |
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You bring up a good point Don that I don't know the answer to. How does one clean the injectors and how often should this be done?
Thanks,
Marcus
do not archive
On Feb 3, 2013, at 10:00 AM, Don McDonald <building_partner(at)yahoo.com (building_partner(at)yahoo.com)> wrote:
When discussing this it would have been nice to know the actual numbers you came up with. GPH for each cyl when reaching LOP. Having those would have made this thread a little shorter.
Just an FYI....Although my experience may be different than some, what I can tell you is that there sure seem to be a few variables out there.... altitude, MP, RPM, wind direction, BP, and maybe most important, how long it's been since your last injector cleaning. When the previously mentioned change, the LOP numbers may also change.
Don McDonald
--- On Sat, 2/2/13, Bob Turner <bobturner(at)alum.rpi.edu (bobturner(at)alum.rpi.edu)> wrote:
[quote]
href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List
href="http://forums.matronics.com/">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
[b]
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robin(at)PaintTheWeb.com
Guest
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| Posted: Sun Feb 03, 2013 10:17 am Post subject: injector tuning |
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We had the smallest amount of carbon in one restrictor and another one had white fuzzy stuff. All the restrictors were cleaned in an ultra-sonic cleaner. I didn’t see the process as it was done by a friend in their industrial unit. I do see some units on eBay for cheap but have no idea if they are appropriate. Regardless the end result was more consistent fuel flow.
Robin
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Marcus Cooper
Sent: Sunday, February 03, 2013 10:00 AM
To: rv10-list(at)matronics.com
Subject: Re: Re: injector tuning
You bring up a good point Don that I don't know the answer to. How does one clean the injectors and how often should this be done?
Thanks,
Marcus
do not archive
On Feb 3, 2013, at 10:00 AM, Don McDonald <building_partner(at)yahoo.com (building_partner(at)yahoo.com)> wrote:
When discussing this it would have been nice to know the actual numbers you came up with. GPH for each cyl when reaching LOP. Having those would have made this thread a little shorter.
Just an FYI....Although my experience may be different than some, what I can tell you is that there sure seem to be a few variables out there.... altitude, MP, RPM, wind direction, BP, and maybe most important, how long it's been since your last injector cleaning. When the previously mentioned change, the LOP numbers may also change.
Don McDonald
--- On Sat, 2/2/13, Bob Turner <bobturner(at)alum.rpi.edu (bobturner(at)alum.rpi.edu)> wrote:
From: Bob Turner <bobturner(at)alum.rpi.edu (bobturner(at)alum.rpi.edu)>
Subject: Re: injector tuning
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Date: Saturday, February 2, 2013, 10:29 PM
--> RV10-List message posted by: "Bob Turner" <[url=x-msg://17/mc/compose?to=bobturner(at)alum.rpi.edu]bobturner(at)alum.rpi.edu[/url]>
Okay, I've got dyslexia. I should have said my worst two outliers peak first, not last.
So again, why does AFP prefer to go smaller on four rather than larger on two? Is there any concern with not reducing fuel flow at full power?
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393483#393483
http://www.matronics.com/Navigator?RV10-List --> http://www.matronics.com/co=================
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partner14
Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas
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| Posted: Sun Feb 03, 2013 10:20 am Post subject: injector tuning |
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Really simple... a trip to Walmart, buy Hoppe's gun cleaner. get a SMALL muffin tray, label them 1-6, put each nozzle in there overnight... done deal.... I tried to do it every other year, but suggest every year for frequent flier's like myself.
Don
--- On Sun, 2/3/13, Marcus Cooper <cooprv7(at)yahoo.com> wrote:
| Quote: |
From: Marcus Cooper <cooprv7(at)yahoo.com>
Subject: Re: Re: injector tuning
To: rv10-list(at)matronics.com
Date: Sunday, February 3, 2013, 12:00 PM
You bring up a good point Don that I don't know the answer to. How does one clean the injectors and how often should this be done?
Thanks,
Marcus
do not archive
On Feb 3, 2013, at 10:00 AM, Don McDonald <[url=/mc/compose?to=building_partner(at)yahoo.com]building_partner(at)yahoo.com[/url]> wrote:
When discussing this it would have been nice to know the actual numbers you came up with. GPH for each cyl when reaching LOP. Having those would have made this thread a little shorter.
Just an FYI....Although my experience may be different than some, what I can tell you is that there sure seem to be a few variables out there.... altitude, MP, RPM, wind direction, BP, and maybe most important, how long it's been since your last injector cleaning. When the previously mentioned change, the LOP numbers may also change.
Don McDonald
--- On Sat, 2/2/13, Bob Turner <[url=/mc/compose?to=bobturner(at)alum.rpi.edu]bobturner(at)alum.rpi.edu[/url]> wrote:
| Quote: |
From: Bob Turner <[url=/mc/compose?to=bobturner(at)alum.rpi.edu]bobturner(at)alum.rpi.edu[/url]>
Subject: Re: injector tuning
To: [url=/mc/compose?to=rv10-list(at)matronics.com]rv10-list(at)matronics.com[/url]
Date: Saturday, February 2, 2013, 10:29 PM
--> RV10-List message posted by: "Bob Turner" <bobturner(at)alum.rpi.edu>
Okay, I've got dyslexia. I should have said my worst two outliers peak first, not last.
So again, why does AFP prefer to go smaller on four rather than larger on two? Is there any concern with not reducing fuel flow at full power?
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393483#393483
http://www.matronics.com/Navigator?RV10-List --> http://www.matronics.com/co=================
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href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List
href="http://forums.matronics.com/">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
http://www.matro====================
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[quote][b]
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Don A. McDonald
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cooprv7(at)yahoo.com
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| Posted: Sun Feb 03, 2013 10:40 am Post subject: injector tuning |
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Thanks to both the responses. I happen to have gun cleaner,not sure if I can talk my wife out of the muffin pans though 
Any tricks to removing and reinstalling the injectors. Considering all the work I've done on the 4 airplanes I've built and maintained I'm amazed I never tackled this particular project.
Thanks again,
Marcus
On Feb 3, 2013, at 1:19 PM, Don McDonald <building_partner(at)yahoo.com (building_partner(at)yahoo.com)> wrote:
Really simple... a trip to Walmart, buy Hoppe's gun cleaner. get a SMALL muffin tray, label them 1-6, put each nozzle in there overnight... done deal.... I tried to do it every other year, but suggest every year for frequent flier's like myself.
Don
--- On Sun, 2/3/13, Marcus Cooper <cooprv7(at)yahoo.com (cooprv7(at)yahoo.com)> wrote:
| Quote: |
From: Marcus Cooper <cooprv7(at)yahoo.com (cooprv7(at)yahoo.com)>
Subject: Re: Re: injector tuning
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Date: Sunday, February 3, 2013, 12:00 PM
You bring up a good point Don that I don't know the answer to. How does one clean the injectors and how often should this be done?
Thanks,
Marcus
do not archive
On Feb 3, 2013, at 10:00 AM, Don McDonald <[url=x-msg://26/mc/compose?to=building_partner(at)yahoo.com]building_partner(at)yahoo.com[/url]> wrote:
When discussing this it would have been nice to know the actual numbers you came up with. GPH for each cyl when reaching LOP. Having those would have made this thread a little shorter.
Just an FYI....Although my experience may be different than some, what I can tell you is that there sure seem to be a few variables out there.... altitude, MP, RPM, wind direction, BP, and maybe most important, how long it's been since your last injector cleaning. When the previously mentioned change, the LOP numbers may also change.
Don McDonald
--- On Sat, 2/2/13, Bob Turner <[url=x-msg://26/mc/compose?to=bobturner(at)alum.rpi.edu]bobturner(at)alum.rpi.edu[/url]> wrote:
| Quote: |
From: Bob Turner <[url=x-msg://26/mc/compose?to=bobturner(at)alum.rpi.edu]bobturner(at)alum.rpi.edu[/url]>
Subject: Re: injector tuning
To: [url=x-msg://26/mc/compose?to=rv10-list(at)matronics.com]rv10-list(at)matronics.com[/url]
Date: Saturday, February 2, 2013, 10:29 PM
--> RV10-List message posted by: "Bob Turner" <bobturner(at)alum.rpi.edu>
Okay, I've got dyslexia. I should have said my worst two outliers peak first, not last.
So again, why does AFP prefer to go smaller on four rather than larger on two? Is there any concern with not reducing fuel flow at full power?
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393483#393483
http://www.matronics.com/Navigator?RV10-List --> http://www.matronics.com/co=================
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[quote]
href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List
href="http://forums.matronics.com/">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
[b]
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partner14
Joined: 12 Jan 2008
Posts: 540
Location: Granbury Texas
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| Posted: Sun Feb 03, 2013 11:12 am Post subject: injector tuning |
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REALLY simple, even Robin could do it... maybe Pascal to! I don't have any pics... but once you look at the system, you'll have no problem figuring it out.
Don
--- On Sun, 2/3/13, Marcus Cooper <cooprv7(at)yahoo.com> wrote:
| Quote: |
From: Marcus Cooper <cooprv7(at)yahoo.com>
Subject: Re: Re: injector tuning
To: rv10-list(at)matronics.com
Date: Sunday, February 3, 2013, 12:40 PM
Thanks to both the responses. I happen to have gun cleaner,not sure if I can talk my wife out of the muffin pans though
Any tricks to removing and reinstalling the injectors. Considering all the work I've done on the 4 airplanes I've built and maintained I'm amazed I never tackled this particular project.
Thanks again,
Marcus
On Feb 3, 2013, at 1:19 PM, Don McDonald <[url=/mc/compose?to=building_partner(at)yahoo.com]building_partner(at)yahoo.com[/url]> wrote:
Really simple... a trip to Walmart, buy Hoppe's gun cleaner. get a SMALL muffin tray, label them 1-6, put each nozzle in there overnight... done deal.... I tried to do it every other year, but suggest every year for frequent flier's like myself.
Don
--- On Sun, 2/3/13, Marcus Cooper <[url=/mc/compose?to=cooprv7(at)yahoo.com]cooprv7(at)yahoo.com[/url]> wrote:
| Quote: |
From: Marcus Cooper <[url=/mc/compose?to=cooprv7(at)yahoo.com]cooprv7(at)yahoo.com[/url]>
Subject: Re: Re: injector tuning
To: [url=/mc/compose?to=rv10-list(at)matronics.com]rv10-list(at)matronics.com[/url]
Date: Sunday, February 3, 2013, 12:00 PM
You bring up a good point Don that I don't know the answer to. How does one clean the injectors and how often should this be done?
Thanks,
Marcus
do not archive
On Feb 3, 2013, at 10:00 AM, Don McDonald <building_partner(at)yahoo.com> wrote:
When discussing this it would have been nice to know the actual numbers you came up with. GPH for each cyl when reaching LOP. Having those would have made this thread a little shorter.
Just an FYI....Although my experience may be different than some, what I can tell you is that there sure seem to be a few variables out there.... altitude, MP, RPM, wind direction, BP, and maybe most important, how long it's been since your last injector cleaning. When the previously mentioned change, the LOP numbers may also change.
Don McDonald
--- On Sat, 2/2/13, Bob Turner <bobturner(at)alum.rpi.edu> wrote:
|
| Quote: |
href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List
href="http://forums.matronics.com/">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
http://www.matronics.com/Navigator?RV10-ofollow" target="_blank" href="http://www.matronics.com/contribution">h
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[quote][b]
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_________________
Don A. McDonald
40636 |
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robin(at)PaintTheWeb.com
Guest
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| Posted: Sun Feb 03, 2013 12:02 pm Post subject: injector tuning |
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My only tip is be gentle with the FI lines. You will be swapping out restrictors several times. Just take it easy on the lines to prevent kinking.
Robin
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Marcus Cooper
Sent: Sunday, February 03, 2013 10:40 AM
To: rv10-list(at)matronics.com
Subject: Re: Re: injector tuning
Thanks to both the responses. I happen to have gun cleaner,not sure if I can talk my wife out of the muffin pans though
Any tricks to removing and reinstalling the injectors. Considering all the work I've done on the 4 airplanes I've built and maintained I'm amazed I never tackled this particular project.
Thanks again,
Marcus
On Feb 3, 2013, at 1:19 PM, Don McDonald <building_partner(at)yahoo.com (building_partner(at)yahoo.com)> wrote:
Really simple... a trip to Walmart, buy Hoppe's gun cleaner. get a SMALL muffin tray, label them 1-6, put each nozzle in there overnight... done deal.... I tried to do it every other year, but suggest every year for frequent flier's like myself.
Don
--- On Sun, 2/3/13, Marcus Cooper <cooprv7(at)yahoo.com (cooprv7(at)yahoo.com)> wrote:
From: Marcus Cooper <cooprv7(at)yahoo.com (cooprv7(at)yahoo.com)>
Subject: Re: Re: injector tuning
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Date: Sunday, February 3, 2013, 12:00 PM
You bring up a good point Don that I don't know the answer to. How does one clean the injectors and how often should this be done?
Thanks,
Marcus
do not archive
On Feb 3, 2013, at 10:00 AM, Don McDonald <[url=x-msg://26/mc/compose?to=building_partner(at)yahoo.com]building_partner(at)yahoo.com[/url]> wrote:
When discussing this it would have been nice to know the actual numbers you came up with. GPH for each cyl when reaching LOP. Having those would have made this thread a little shorter.
Just an FYI....Although my experience may be different than some, what I can tell you is that there sure seem to be a few variables out there.... altitude, MP, RPM, wind direction, BP, and maybe most important, how long it's been since your last injector cleaning. When the previously mentioned change, the LOP numbers may also change.
Don McDonald
--- On Sat, 2/2/13, Bob Turner <[url=x-msg://26/mc/compose?to=bobturner(at)alum.rpi.edu]bobturner(at)alum.rpi.edu[/url]> wrote:
From: Bob Turner <[url=x-msg://26/mc/compose?to=bobturner(at)alum.rpi.edu]bobturner(at)alum.rpi.edu[/url]>
Subject: Re: injector tuning
To: [url=x-msg://26/mc/compose?to=rv10-list(at)matronics.com]rv10-list(at)matronics.com[/url]
Date: Saturday, February 2, 2013, 10:29 PM
--> RV10-List message posted by: "Bob Turner" <bobturner(at)alum.rpi.edu (bobturner(at)alum.rpi.edu)>
Okay, I've got dyslexia. I should have said my worst two outliers peak first, not last.
So again, why does AFP prefer to go smaller on four rather than larger on two? Is there any concern with not reducing fuel flow at full power?
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=393483#393483
http://www.matronics.com/Navigator?RV10-List --> http://www.matronics.com/co=================
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5 6 ==============[/b][/quote] V10-List Email Forum -[/b][/quote] >[/b][/quote] :p>[/b][/quote] /o:p>[/b][/quote] tor?RV10-List">http://www.matronics.com/Navigator?RV10-List[/b][/quote] ==============[/b][/quote] bsp; - MATRONICS WEB FORUMS -[/b][/quote] :p>[/b][/quote] tp://forums.matronics.com[/b][/quote] ==============[/b][/quote] bsp; - List Contribution Web Site -[/b][/quote] e> bsp; -Matt Dralle, List Admin.[/b][/quote] bution">http://www.matronics.com/contribution[/b][/quote] ==============[/b] [/quote]7
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