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johnlong63(at)gmail.com
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 Posted: Sat May 16, 2009 4:05 am Post subject: Exhaust systems |
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In the building stage and near to ordering my engine, 200HP IO-360. Does anyone have opinions, (I know, that is a dumb question  , on 4 to 1 versus Vetterman crossover exhaust systems. Which would be a better choice?
John
Lake Wylie SC
[quote][b]
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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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| Posted: Sat May 16, 2009 5:34 am Post subject: Exhaust systems |
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Don't know about better but I can tell you that my neighbor's 4 into 1 is louder than my Vetterman crossover. Both on O-360.
Dale Ensing
RV-6A
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Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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Larry Bowen
Joined: 09 Jan 2006
Posts: 802
Location: NC, USA
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| Posted: Sat May 16, 2009 6:22 am Post subject: Exhaust systems |
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I looked into it briefly. Once I saw the price, it was easy to decide to go with the standard Vetterman.
--
Larry Bowen
Larry(at)BowenAero.com
http://BowenAero.com
Sent from Welcome, NC, United States
On Sat, May 16, 2009 at 9:33 AM, Dale Ensing <densing(at)carolina.rr.com (densing(at)carolina.rr.com)> wrote:
[quote] Don't know about better but I can tell you that my neighbor's 4 into 1 is louder than my Vetterman crossover. Both on O-360.
Dale Ensing
RV-6A
[quote] ---
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Larry Bowen
RV-8 SOLD,
RV-7QB in progress... |
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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 26321
Location: Livermore CA USA
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| Posted: Sat May 16, 2009 8:25 am Post subject: Exhaust systems |
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At 04:59 AM 5/16/2009 Saturday, you wrote:
| Quote: | In the building stage and near to ordering my engine, 200HP IO-360. Does anyone have opinions, (I know, that is a dumb question , on 4 to 1 versus Vetterman crossover exhaust systems. Which would be a better choice?
John
Lake Wylie SC
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Hi John,
I ordered the new Vetterman 4 into 4 system for my RV-8 with an Lycoming IO-390. Haven't tried it yet, but its another option to consider. Larry claims the maximum HP output with the 4 into 4 setup. I've attached a couple of pictures of it.
Matt Dralle
RV-8 #82880 N998RV (res)
Carpet CAD Layout Continues...
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Matt Dralle
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l-fussell(at)comcast.net
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| Posted: Sat May 16, 2009 11:27 am Post subject: Exhaust systems |
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I used a Sky Dynamics' 4 into with which I am very happy. On the down side it take a lot of glass work on the bottom cowl to accommodate the collector. photo of the header attached and you can see it in this shot from the ground as well.
Larry
RV7A
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bill(at)repucci.com
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| Posted: Sat May 16, 2009 12:58 pm Post subject: Exhaust systems |
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John,
When I was racing and testing and changing exhaust to get the most power I could, I found that the four 4-1 was good for max torque and HP at the red line. The 4-2-1, equal length exhaust provided max torque & HP in the mid RPM range. Granted, that was on a car with a very different engine (1.8, dual overhead cam, fuel injected, with a high red-line, and tuned w/in a breadth of its life.) than the big slow turning things we use on our planes. In my application I went with the 4-2-1 (or tri-Y as some call it) because I needed mid range torque.
With that little bit of knowledge, I would probably select the Vetterman’s crossover, thinking that you are going to run it in the mid-range RPM’s unless you are into racing.
It is all about what you are looking for and where you want your power peak.
Bill
From: owner-rvsoutheast-list-server(at)matronics.com [mailto:owner-rvsoutheast-list-server(at)matronics.com] On Behalf Of John Long
Sent: Saturday, May 16, 2009 8:00 AM
To: rvsoutheast-list(at)matronics.com
Subject: Exhaust systems
In the building stage and near to ordering my engine, 200HP IO-360. Does anyone have opinions, (I know, that is a dumb question , on 4 to 1 versus Vetterman crossover exhaust systems. Which would be a better choice?
John
Lake Wylie SC
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