---------------------------------------------------------- RV4-List Digest Archive --- Total Messages Posted Mon 09/05/05: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:29 AM - Exhaust pipes. (Gene Smith) 2. 05:55 PM - Re: Exhaust pipes. (RVer273sb@aol.com) ________________________________ Message 1 _____________________________________ Time: 05:29:04 AM PST US From: "Gene Smith" Subject: RV4-List: Exhaust pipes. --> RV4-List message posted by: "Gene Smith" I need new exhaust pipes for my RV-4...Would someone please educate me on the difference between "straight pipes" and "cross-overs." Fuel consumption obviously is a big concern now, and noise levels near a small community could develop into a problem...Specifically, do "straights" enable more power from the engine, and less fuel consumption?..Seems I read somewhere that "tuned" exhausts were the way to go...What is the advantage and disadvantage of each?..The engine is a Lycoming 0-320 E2A, modified to 160 HP..........Thanks..........CHEERS!!!!..........Gene Smith. ________________________________ Message 2 _____________________________________ Time: 05:55:17 PM PST US From: RVer273sb@aol.com Subject: Re: RV4-List: Exhaust pipes. --> RV4-List message posted by: RVer273sb@aol.com I think Larry would tell you there is no noticable difference between the two. Perhaps the crossover would be alittle quieter. You can get a larger heat muff on the 4 pipe covering two pipes.. stewart, RV-4 Colorado