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Old 07-27-2010, 02:48 PM
scsmith scsmith is offline
Join Date: Jan 2008
Location: Ashland, OR
Posts: 1,824
Default there may just not be room with horizontal induction

Originally Posted by ao.frog View Post

I contacted Larry and he told me that mufflers could not be installed with horizontal fwd facing induction.

After looking through this website:
it appears that one can install mufflers with a x-over horizontal induction after all. You'll have to order a PVC-kit and make a model of your system, so it probably will be somewhat more costly, but it looks like it can be done.
It sounds like Larry has tried. The PVC kit is an invitation to give it a try on your own, but if Larry couldn't figure out a way, there may just not be enough room. I don't know. I'd love for someone to succeed, and then have Larry or aircraftexhaust market it as a standard install.
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 500 in 8-3/4 years
also LS-6-15/18 sailplane
VAF donation Dec 2017
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Old 08-02-2010, 12:35 PM
rv8ch rv8ch is offline
Join Date: Feb 2005
Location: LSGG
Posts: 2,284
Default No workie

Just got off the phone with Larry, and he said that for mufflers you can't use horizontal induction. I'm not sure what the issue is, since I really can't visualize the difference between various models, I will just have to believe him. He said to get the -B1B which has vertical induction and then the exhaust with muffler will work.
Mickey Coggins
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Old 03-20-2011, 11:36 AM
jay.pearlman jay.pearlman is offline
Join Date: Jan 2010
Location: Port Angeles WA
Posts: 247
Default Exhaust for IO360M1B

I mounted a vetterman exhaust for the first time yesterday on an IO-360M1B. It fit well except for two challenges (maybe three) which I hope someone has creative solutions for. I attach a picture.
1. The crossover on the exhaust hits the throttle cable for the front horizontal injector.
2. The two exhaust pipes where they crossover rub against each other (hmmmm!)
3. The natural position for the heat muff where most have been putting it has fittings for the pipe connections and the ball joint is close.
Love the exhaust, just need some help on the three issues.

Last edited by jay.pearlman : 03-20-2011 at 11:39 AM.
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Old 03-25-2011, 05:57 PM
jay.pearlman jay.pearlman is offline
Join Date: Jan 2010
Location: Port Angeles WA
Posts: 247
Default Update on IO360M1B exhaust and heat

I talked with Larry Vetterman, then Rick Robbins and then Vans. All were very helpful. I am implementing an approach and should have some photos shortly. Basically, when tightened, the crossing exhausts do not touch or interfere. Larry's engineering is first class and he quickly identified the issue.
The throttle cable mount cannot be made according to Van's plans but needs to be modified for the IO360M1B by moving it upward and outward. It will still need a heat shield. Both Larry and Scott (at Vans) headed toward the same solution. I noted from the response of a couple of builders that they found the same issue and the same solution. More details coming soon. Need to check it first.
For the IO 360M1B with horizontal injection, the heat muff goes on the exhaust of the number one cylinder (only) and there is enough straight run to fit an 8" muff and perhaps a 9". I chose an 8" after making measurements and leaving a little fudge room. Rick Robbins of Robbins Wings said that it is better to have the intake air for the muff coming from the rear of the engine so it has some preheating over the cylinders on cold days. I put together an approach and will be installing it shortly. May still be a bit cool in the middle of winter. More details soon when I have finished the installation.
Thanks to the people who sent me photos.
Larry and Rick have gone out of their way to help and I recommend them and their products.
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Old 11-25-2015, 07:12 AM
Bill Dicus Bill Dicus is offline
Join Date: Jan 2005
Location: Shorewood, WI (Milwaukee area)
Posts: 1,066
Default Vetterman, heater

My -8 has a Lycon IO-360M1B so I await your solution with great interest. Did not use the Vans' throttle set up, rather a simple homemade bracket on crankcase and turning the arm downward instead of up to reverse movement direction. This may have to change. Thanks for posting about this!
Bill Dicus
Shorewood (Milwaukee) Wisconsin
RV-8 N9669D Flying 12/4/14!
Flying Pitts S-2A, Piper Lance
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Old 08-01-2017, 03:12 PM
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sglynn sglynn is offline
Join Date: Mar 2008
Location: Anacortes, WA
Posts: 613
Default Vetterman Exhaust on M1B w/ horizontal Induction

Did more get published about these three issues. I will be starting my Vetterman Exhaust system install tonight on RV-7A. I hope I do not need to move my throttle cable.
Steve Lynn
95% Complete
Ready for first start
Anacortes, WA

Last edited by sglynn : 08-01-2017 at 03:38 PM.
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Old 08-01-2017, 03:25 PM
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Raymo Raymo is offline
Join Date: Nov 2014
Location: Richmond Hill, GA (KLHW)
Posts: 1,670

If you install the Trombone exhaust, there are no issues other than lower cowling clearance. I had to put a small bubble to provide clearance for the tail pipe clamp on the left side.

No mufflers on my setup (-7A), which might have required more lower cowl modification.
RV-7A - Slider - N495KL - First flt 27 Jan 17
O-360-A4M w/ Catto 3 blade NLE, AFP FM-150 FI, 1 PMag, Vetterman Trombone Exh, SkyTech starter,
PlanePower Alt, FlightLines Interior, James cowl & plenum
All lines by TSFlightLines

"The object of the game, gentlemen, is not to cheat death: the object is not to let him play."
Patrick Poteen, Sgt. U.S. Army
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Old 08-01-2017, 07:44 PM
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grubbat grubbat is offline
Join Date: May 2012
Location: Ga
Posts: 538
Default Good to go

I have the trombone with mufflers on horizontal induction io360 and no clearance issues on my -9.

RV-3 Sold
RV-6a Sold
RV-9 IO-360 CS, Flying
1946 Piper Cub - in process......
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