Question on SCR and DCR with 91 octane...

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Feb 6, 2008 | 09:02 PM

deeloc1

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Question on SCR and DCR with 91 octane...

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

Feb 6, 2008 | 09:14 PM

nobreaks254

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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.

Feb 7, 2008 | 12:42 AM

deeloc1

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Quote:

Originally Posted by nobreaks254

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.

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???

Feb 7, 2008 | 01:52 AM

warp_6

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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.

Feb 7, 2008 | 03:55 AM

deeloc1

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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!

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