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AK-14P carb

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tjyak50

Joined: 31 May 2007
Posts: 81
Location: Phoenix, AZ

Posted: Tue Oct 12, 2010 6:49 am Post subject: AK-14P carb

I have made numerous adjustments to my M14 carb jets and settings by

reference to the Carb manual Task Cards and my Fuel Flow Indicator

(JPI-450).  Without a Fuel Flow indicator you are guessing (they are $300 to

$500 installed and U need one).



GENERALLY:  in my experience:

Main-Suction-Air-Compensating jet changes WOT fuel flow only for the most

part.

Compensating screw at back of carb adjust mid-range and messes up idle.

Idle screw on co-pilots side changes idle only.



I like my idle lean and target about 2.3 to 3.5 gph in the range of 25% to

40%.



My engine is modified and I live in Arizona so I wanted more WOT fuel flow.

I removed the Main-Suction-Air-Compensating jet which sits behind the

diaphragm.

As delivered it was a 1.9mm jet which is at the lean end.



I experimented with several smaller (richer) jets and now have a 1.6mm jet.

This yields me 42-44 gph at WOT takeoff 100+% RPM at Sea Level.



I also made some turns to the mid-range clicker which sits directly at the

back of the carb.  It is a slotted screw with a bunch of holes around it and

a thin metal cap.  That thin metal cap has a pin which sits in one of the

holes and limits the mid-range to 8 clicks.  The task cards imply you should

remove this cap and twist this screw all over the place.

Don't do that.



Just experiment within the 8 clicks from stop to stop of that pin.

There are a total of 30some clicks and beyond the 30 be dragons.

The pin in the thin metal cover restricts that to 8 clicks (one revolution).

Adjusting that will whack your idle flow so you need to change your idle

flow afterwards.

I found a click richer needed about a click leaner on idle as a good start.

I use my runup 70% setting to gauge where my mid-range is and I wish I never

touched it.



The clicks can be vague.  Sometimes it is hard to tell if you clicked or

not.

Easy to get lost.



Best results... try a different Top end jet to get you more WOT fuel flow if

you want cooling.

Get a nice lean idle for clean running.

Leave the mid-range alone unless you need a change.



My engine has the acceleration stumble which contributes to my intense

masculinity and will not be changed.

Mostly because I don't have any of the Acceleration Jets here...?



Tj



BY THE WAY... I found a certain position of my gills that gives me the

lowest CHT and it aint wide open!

---------------------------

Thomas Johnson

Airpower Insurance, LLC

36 West Ocotillo Road

Phoenix, AZ  85013-1235

Toll Free: 866-475-9199

Tel:  602-628-2701

Fax:  623-321-5843

www.airpowerinsurance.com

E:  tomjohnson(at)cox.net

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terrycalloway(at)mac.com
Guest

Posted: Tue Oct 12, 2010 7:24 am Post subject: AK-14P carb

I have an AK-14P Carburetor for sale if anyone needs it.   We replaced it with fuel injection.  I have no idea what one should costs and would appreciate feedback on pricing as well. You can contact me off line at terrycalloway(at)mac.com if interested.



Regards,

tc

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bwade154(at)yahoo.com
Guest

Posted: Tue Oct 12, 2010 8:25 am Post subject: AK-14P carb

Terry how about a report on fuel injection. where did you get it it seems to be in the experimental stage at the factory for Sukoi, what is the price and availability does it really cut full burn, cooler head temps. Inquiring minds would like to know. Did you find a source for electronic ignition also

Bill Wade

From: Terry Calloway <terrycalloway(at)mac.com>

To: yak-list(at)matronics.com

Sent: Tue, October 12, 2010 11:18:44 AM

[b]

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mark.bitterlich(at)navy.m
Guest

Posted: Tue Oct 12, 2010 10:07 am Post subject: AK-14P carb

Thanks Tom, very valuable info.  I especially was interested in your point of being able to accurately measure fuel flow while making these adjustments.  Great point.  

 

I'm next door to you right now at Yuma, wave when you fly by. 

 

Mark

 



________________________________



From: owner-yak-list-server(at)matronics.com on behalf of Tom Johnson

Sent: Tue 10/12/2010 10:45 AM

To: yak-list(at)matronics.com

Subject: AK-14P carb






I have made numerous adjustments to my M14 carb jets and settings by

reference to the Carb manual Task Cards and my Fuel Flow Indicator

(JPI-450).  Without a Fuel Flow indicator you are guessing (they are $300 to

$500 installed and U need one).



GENERALLY:  in my experience:

Main-Suction-Air-Compensating jet changes WOT fuel flow only for the most

part.

Compensating screw at back of carb adjust mid-range and messes up idle.

Idle screw on co-pilots side changes idle only.



I like my idle lean and target about 2.3 to 3.5 gph in the range of 25% to

40%.



My engine is modified and I live in Arizona so I wanted more WOT fuel flow.

I removed the Main-Suction-Air-Compensating jet which sits behind the

diaphragm.

As delivered it was a 1.9mm jet which is at the lean end.



I experimented with several smaller (richer) jets and now have a 1.6mm jet.

This yields me 42-44 gph at WOT takeoff 100+% RPM at Sea Level.



I also made some turns to the mid-range clicker which sits directly at the

back of the carb.  It is a slotted screw with a bunch of holes around it and

a thin metal cap.  That thin metal cap has a pin which sits in one of the

holes and limits the mid-range to 8 clicks.  The task cards imply you should

remove this cap and twist this screw all over the place.

Don't do that.



Just experiment within the 8 clicks from stop to stop of that pin.

There are a total of 30some clicks and beyond the 30 be dragons.

The pin in the thin metal cover restricts that to 8 clicks (one revolution).

Adjusting that will whack your idle flow so you need to change your idle

flow afterwards.

I found a click richer needed about a click leaner on idle as a good start.

I use my runup 70% setting to gauge where my mid-range is and I wish I never

touched it.



The clicks can be vague.  Sometimes it is hard to tell if you clicked or

not.

Easy to get lost.



Best results... try a different Top end jet to get you more WOT fuel flow if

you want cooling.

Get a nice lean idle for clean running.

Leave the mid-range alone unless you need a change.



My engine has the acceleration stumble which contributes to my intense

masculinity and will not be changed.

Mostly because I don't have any of the Acceleration Jets here...?



Tj



BY THE WAY... I found a certain position of my gills that gives me the

lowest CHT and it aint wide open!

---------------------------

Thomas Johnson

Airpower Insurance, LLC

36 West Ocotillo Road

Phoenix, AZ  85013-1235

Toll Free: 866-475-9199

Tel:  602-628-2701

Fax:  623-321-5843

www.airpowerinsurance.com

E:  tomjohnson(at)cox.net

- The Matronics Yak-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Yak-List

radiopicture

Joined: 23 Jun 2008
Posts: 263

Posted: Tue Oct 12, 2010 3:46 pm Post subject: AK-14P carb

WTF is WOT? Wide open throttle, right?

On Oct 12, 2010, at 10:45 AM, Tom Johnson wrote:



 	  Quote: 	
		   



 I have made numerous adjustments to my M14 carb jets and settings by

 reference to the Carb manual Task Cards and my Fuel Flow Indicator

 (JPI-450).  Without a Fuel Flow indicator you are guessing (they are  

 $300 to

 $500 installed and U need one).



 GENERALLY:  in my experience:

 Main-Suction-Air-Compensating jet changes WOT fuel flow only for the  

 most

 part.

 Compensating screw at back of carb adjust mid-range and messes up  

 idle.

 Idle screw on co-pilots side changes idle only.



 I like my idle lean and target about 2.3 to 3.5 gph in the range of  

 25% to

 40%.



 My engine is modified and I live in Arizona so I wanted more WOT  

 fuel flow.

 I removed the Main-Suction-Air-Compensating jet which sits behind the

 diaphragm.

 As delivered it was a 1.9mm jet which is at the lean end.



 I experimented with several smaller (richer) jets and now have a  

 1.6mm jet.

 This yields me 42-44 gph at WOT takeoff 100+% RPM at Sea Level.



 I also made some turns to the mid-range clicker which sits directly  

 at the

 back of the carb.  It is a slotted screw with a bunch of holes  

 around it and

 a thin metal cap.  That thin metal cap has a pin which sits in one  

 of the

 holes and limits the mid-range to 8 clicks.  The task cards imply  

 you should

 remove this cap and twist this screw all over the place.

 Don't do that.



 Just experiment within the 8 clicks from stop to stop of that pin.

 There are a total of 30some clicks and beyond the 30 be dragons.

 The pin in the thin metal cover restricts that to 8 clicks (one  

 revolution).

 Adjusting that will whack your idle flow so you need to change your  

 idle

 flow afterwards.

 I found a click richer needed about a click leaner on idle as a good  

 start.

 I use my runup 70% setting to gauge where my mid-range is and I wish  

 I never

 touched it.



 The clicks can be vague.  Sometimes it is hard to tell if you  

 clicked or

 not.

 Easy to get lost.



 Best results... try a different Top end jet to get you more WOT fuel  

 flow if

 you want cooling.

 Get a nice lean idle for clean running.

 Leave the mid-range alone unless you need a change.



 My engine has the acceleration stumble which contributes to my intense

 masculinity and will not be changed.

 Mostly because I don't have any of the Acceleration Jets here...?



 Tj



 BY THE WAY... I found a certain position of my gills that gives me the

 lowest CHT and it aint wide open!

 ---------------------------

 Thomas Johnson

 Airpower Insurance, LLC

 36 West Ocotillo Road

 Phoenix, AZ  85013-1235

 Toll Free: 866-475-9199

 Tel:  602-628-2701

 Fax:  623-321-5843

 www.airpowerinsurance.com

 E:  tomjohnson(at)cox.net

- The Matronics Yak-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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dsavarese0812(at)bellsout
Guest

Posted: Tue Oct 12, 2010 4:03 pm Post subject: AK-14P carb

Yep!

 Dennis

 [quote]   ---

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