[Joshinator99]

Originally Posted by JP374

Hey guys,

So in the process of learning and tinkering with my tune I am curious about timing. My car made 890,s whp on e60 blend with only 21.5* of timing, I have been reading about different FI builds where guys are starting at 26-28* of timing and has me curious if I may have left some power on the table.

Build: P1X, forged, btr stage 2 blower cam, lpe big bore, +30's, Fore innovations fuel system.

Last time I had car on the dyno I was trying to get MS in check so went from e85 to e60, and targeting .84 lamda, got it to maintain at 5.1MS fuel system was happy, injector duty cycle 28%. originally timing was at 18* and made 840, went to 21.5* and made 890's with e60. I was happy with the numbers and packed it up. Everything with fuel system looked great, MS etc. Now that I've been reading and learning I am wondering if I left anything on the table. I have never had any KR on dyno or street logs.

It has plenty of power and am very happy with it, however the gearhead in me is really starting to wonder if I could of gained anything or broke 900 whp lol.

I appreciate any feedback.

Thanks JP

FYI duty cycle means nothing with DI.

21.5 degrees is on the conservative side for E60 but not obnoxiously so. You probably had another 10-15 WHP sitting there but you grabbed a good amount of the low hanging fruit already. Definitely worth going up a degree or two, and seeing if you gain power. If you don’t, then just go back to where you were.