deeloc1

iTrader: (20)

Does anyone know what is the max scr and dcr i will be able to run with our horrible 91 octane in California? I was thinking about millling my AFR 205's to 62cc and running .40 cometic gaskets with my f13 cam...think i can get away with the SCR and DCR this will create with 91 octane? Also, does anyone know how much i will have to mill my heads if they are at 66cc right now and i want to be at 62cc?

Thanks,

DeAndre

nobreaks254

iTrader: (50)

Not sure about the scr/dcr. But I think you mill .006 for every 1cc. So if your heads are 66 you mill .024 to get to 62. My AFR's measured 66.5 and I milled .027 to get to 62.

deeloc1

iTrader: (20)

Thanks for the info...anyone else have any input on running 11.3 or 11.4comp ratio with 91 Octane with the SCR and DCR created by milling to 62cc or 61cc with a .40 cometic gasket? Do any of you think i will be able to get away with it without knock? The cam i'm running is a f13 on a 12LSA. Pred Z, Patrick G, Tony Mamo...any info on this???

warp_6

iTrader: (2)

I think my cam is similar to the F13. 232/238 113+4 I'm running 243 castings 64.5cc (stk) .040 cometic's. PTV was at the limit! Stk bottom end for now
11.1:1
8.4:1
No knock at all on Cali 91 w/30* of timming WOT.

deeloc1

iTrader: (20)

11:1 comp is nice...still wondering what's the mostcomp i can run on this weak 91 octane. Anyone else running compression higher than ^^ 11:1scr, 8.4:1dcr on 91 octane??? Thanks for the input Warp 6!