Quote:
Originally Posted by Alpha D
^ Just tuned my car on 30psi stock Comp and at times a i saw 3 counts of knock...eventually that got sorted out and it went down to phantom knock to not even half a knock...point is never say never  GLWS ! |
Yeah it's not impossible I guess, you would have to be running far too much timing or have something in your combustion chamber causing pre ignition, or also E85 has a tendency to rich knock below 11.5:1 and lower on some cars on a gasoline calibrated wideband, I always tune a hair over 12:1 to stay away from that and you're safe usually up to about 12.5:1, my last Talon ran 12.2:1 all day every day for several months of relentless beatings at 30lbs with an HX35, like as in wrapping my speedo around every other day,with no problems and never got knock with a stock ignition map, BTW E85 likes more timing than gasoline, 23 deg advance seems to net max power which just so happens to be what a 1g timing map is over 10psi @ 6k rpms, my friend had all kinds of problems from burnt valves to melted pistons from running a pump gas style high boost timing map on E85. You usually just lose power long before knock happens from too much timing on E85 but retarded timing causes all kinds of problems.
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