So if I have a 400 bored to 4.155 and my stroke is 4.250 and my deck is 0 decked and my heads are 90 cc what pistons do I need to achieve 9.25to1 ?
That being the case, then I'd say it's not "worth it" to try to walk the razor's edge on compression. Consider this: with everything else being held the same, the power difference between a 9.5:1 engine and a 10.5:1 engine of the displacements we're talking about (400 - 461) will be less than 10hp, maybe less than 5. Is that small difference in power "worth" having an engine that you have to worry about constantly, stay "on top of" its tuning and and its cooling systems, fret about whether that octane rating at the pump is accurate? - vs. one you can just fire up and drive anywhere without having to worry?Thanks 4 all the info I'm still learning and this will be my first Pontiac build. I just want a good running engine that is reliable.
The point I was making was that for a 'driver' street engine, I don't think it's worth worth the hassle of trying to milk every last bit of compression you can out of it - trying to walk 'right on the line' of detonation.Bear not sure what your talking about but I'm trying to get 9.25to1 for pump gas not 10.5to 1