---------------------------------------------------------- RV8-List Digest Archive --- Total Messages Posted Thu 07/17/08: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:01 AM - 10:1 Compression / IO-360 200 HP (Matt Dralle) 2. 10:23 AM - Re: 10:1 Compression / IO-360 200 HP (BPA) ________________________________ Message 1 _____________________________________ Time: 10:01:28 AM PST US From: Matt Dralle Subject: RV8-List: 10:1 Compression / IO-360 200 HP Does anyone have any experience with 10:1 compression in a IO-360 200 HP engine? * What are the down sides of running 10:1 in that engine? * What is the HP gain? * What is the impact to TBO? * What is the impact to reliability? If you've done it, would you do it again, or just go with the standard 8.7:1 compression? Matt Dralle RV-8 #82880 ________________________________ Message 2 _____________________________________ Time: 10:23:40 AM PST US Subject: RE: RV8-List: 10:1 Compression / IO-360 200 HP From: "BPA" Matt, I think I can answer your questions. * The down side to running 10:1 pistons in the 200 hp IO-360 is the increase in cylinder pressures and bearing loads, particularly the rod bearings. * We see an increase of approximately 6-8 HP on our dynamometer. * You can just about count on a 1,000 hour TBO with 10:1 pistons * See last answer! TBO's are subjective and more dependant on operator input, maintenance and frequency of use, or lack thereof. Hope this helps, Allen BPE, Inc. -----Original Message----- From: owner-rv8-list-server@matronics.com [mailto:owner-rv8-list-server@matronics.com] On Behalf Of Matt Dralle Sent: Thursday, July 17, 2008 10:56 AM Subject: RV8-List: 10:1 Compression / IO-360 200 HP Does anyone have any experience with 10:1 compression in a IO-360 200 HP engine? * What are the down sides of running 10:1 in that engine? * What is the HP gain? * What is the impact to TBO? * What is the impact to reliability? If you've done it, would you do it again, or just go with the standard 8.7:1 compression? Matt Dralle RV-8 #82880 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv8-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV8-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rv8-list Browse Digests http://www.matronics.com/digest/rv8-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.