---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Fri 05/13/05:1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:03 PM - Re: Autofuel (Hinde, Frank George (Corvallis)) ________________________________ Message 1 _____________________________________ Time: 04:03:40 PM PST US Subject: RE: RV7-List: Autofuel From: "Hinde, Frank George (Corvallis)" --> RV7-List message posted by: "Hinde, Frank George (Corvallis)" Hi All, According to GAMI the IO360 can run premium autofuel and they recommend the following. Based presumably on the testing they have done with their new PRISM ignition system that adjusts the spark timing and measures the crank angle where the max cylinder pressure occurs....Apparently this point is 16 deg ATDC. For the first time we are on the cusp of having the timing being adjusted based on what the engine is actually doing...its a bit like a highly advanced knoock sensor found on auto engines. By this time you should be saying WOW! The great thing is you can almost throw any fuel in it you want (as long as it does not pre-ignite)...If it detontates the Prism will presumably retard the ignition until it stops. But I digress...They say to keep CHT's down to 375F or less. And then run at 100F ROP or 25 to 50 LOP. So there you have it...They believe these are conservative numbers. Frank