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Old 04-23-2018, 03:28 AM
MeAndMyToys MeAndMyToys is offline
Join Date: Jan 2011
Location: Hillsboro,OR
Posts: 133

Originally Posted by greghughespdx View Post
For better cabin heat, might want to call or email Clint at Vetterman and discuss the relative benefits of a trombone exhaust and any power differences.
I planned on the Trombone system with mufflers for mine for reason of cabin heat. Clint talked me into the 4 pipe, he said it produced plenty of heat and had a lot more clearance for everything.
RV-7 Tip Up slow build
200HP IO-360-A1B
Hartzell CS
Working on wiring and Fw Fwd
Got my RV-7 tail kit for X-mas 2012
Guess the Wife's on board!!
Dues paid 2/26/2018
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Old 04-23-2018, 05:41 AM
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ronschreck ronschreck is offline
Join Date: Mar 2006
Location: Gold Hill Airpark (NC25), NC
Posts: 1,366

I recently installed Vetterman's 4-pipe exhaust and asked Rick Robbins to modify his heat muff for one and a half inch hoses instead of 2-inch hoses and also asked him to shorten the muff by an inch and a half. All of this to provide more room behind the engine for my inverted oil system and oil accumulator. I still get plenty of heat from the muff as it covers two of the 4 exhaust pipes. Clint and Rick are great to work with. I'm VERY happy with the new exhaust and heat muff.

I had Vetterman's cross-over exhaust on the plane and it served well for 2200 hours. I went to the 4-pipe exhaust following a recent engine overhaul. The 4-pipe does give more room for cables and hoses under the sump and there is no problem with room for 4 pipes at the cowl exit. And the sound! Oh, the sound!
Ron Schreck
IAC Director and National Judge
RV-8, "Miss Izzy", 2200+ RV Hours
Track Me *** Gold Hill Airpark (NC25)
VAF 2019 Donor
"Flying is the art of throwing yourself at the ground and missing."
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Old 04-23-2018, 06:42 AM
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MikeyDale MikeyDale is offline
Join Date: Aug 2012
Location: Garden City Texas
Posts: 815

I have a 4 pipe Vetterman exhaust in my 7 and I love it! Sounds great and heater is awesome in the cockpit! I called Vetterman and he told me just what I needed. Great service!
Mike Hillger
Garden City, Texas
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Old 04-23-2018, 10:31 AM
Join Date: Mar 2008
Location: Seattle
Posts: 1,374

I have the Vetterman Crossover for Superior cold air sump on my RV-8.
I think 4 straight pipes are louder, and tune to a narrower RPM powerband.
If you run a constant speed propeller, 4 straight pipes may be the ticket.
For me, with a fixed pitch, I would like a bit more mid-range power I think the cross-over system affords.
I like the slightly mellow sound, some like the straight pipe bark!
(It could all be in my head?)
Scott Emery
EAA 668340, chapter 326 & IAC chapter 67
RV-8 N89SE first flight 12/26/2013
Yak55M, and the wife has an RV-4
There is nothing-absolute nothing-half so much worth doing as simply messing around with Aeroplanes
(with apologies to Ratty)
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