“…..When I was building my coupe engine I was thinking of using a small B&M blower, was told that 9.0 CR with less than 10 pounds boost would be fine ( and fun)……”


I did one of those for a customer years ago, realistically I think the actual static compression for probably about 8.5:1. It did good and really woke up the little 355 SBC. It was also pump gas friendly, but keep in mind the car lived most of its life at 4500 ft and when he took it to the strip he raced at 2000 ft……. we can get by with a little more compression and timing here.


“…….Getting good gas can be an issue in some areas. I may look into water/methanol injection. I suppose I could just carry some Race Gas additive for emergency fillup situations, but would rather not need it. Water/meth and/or boost retard might get me through times when 89 octane may be all that is available…..”

I think your right about the gas Mike, and I think it’s going to get worse in the near term with the approval of E15. On my trip back to Illinois last year there were a couple places (2 in a row) where the only option was 89 octane, either non-ethanol or E10. The old HEMI was NOT happy. If I ever make the trip again I will definitely have a couple of bottles of octane boost with me.


I think Mike is right about fuel injection and spark control, however I’m not sure the add-on spark control can automatically compensates for fuel quality. At least you should be able to change total timing pretty easily from the drivers seat however. I’m still trying to figure this stuff out myself so take that with a gain of salt.



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