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Permalink Reply by david shrader on August 17, 2017 at 9:40pm

The cross over pipes are a lot more durable, and don't leak at the clamp. Can't speak about the extra hp but if you plan on keeping your plane for the long term I'd do it

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Permalink Reply by Joe Spencer on August 18, 2017 at 8:09am

I've run crossovers on 180 horse motors. I wasn't a good flight tester then so never did actually measure the results. At that time all the serious acro guys were running x-overs...now I think it's mostly 4 into one typr setups. I built up a set of 2 into 1 for each side of a Lyc 180 and lucked up and got it just wrong; cut the climb from 1500 fpm to 1000-1100. I didn't expect that. So went to the xovers and got all that back plus some. I understand the hesitancy; yeh they're expensive. I'd wanta compare the weight too; that would be big for me.

Didn't answer your question, but some history that's maybe helpful

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Permalink Reply by Gil DeVault on August 18, 2017 at 8:22am

I have pretty much made up my mind to go with the crossover set up. I am writing on a quote from Dawley in Burlington WI. So for they are ll quoting around 1500 to 1800 for a complete set up with cabin and carb heat with tail pipes. My main concern now is that they fit under my 601 cowl. For those prices I expect everything to be perfect

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Permalink Reply by Gil DeVault on August 18, 2017 at 5:26pm

I ordered the cross over exhaust system with carb heat/ cabin heat & tail pipes from Aircraft Spruce for my 601 0-235 engine. They had the best price, but a 4 to 5 week waiting period. They said it was designed for the 601.

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Permalink Reply by Richard Carson on August 24, 2017 at 8:44am

I purchased Vetterman crossover pipes just like the ones I put on my rv7a when I built it. They fit beautifully and they cost about a grand. Well worth it. They are now on my 02 35 and I'm building a 750 stol.

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