I've reached a point in my long rod buildup that brings me to a question. The issue at hand is the compression ratio. I'm at approx 9:1 now, but if I go for a quench setup, it'll put me at right around 10.5:1. Given that this is going in a daily driven street car, with EFI and a 4 speed, I'm a bit torn. For those of you that have built up the 198/2.2 setup in the past, just how much compression will it handle on the street, before pump gas becomes a major issue?

FYI, the current buildup looks like this:

76 225 block
Forged crank (0.000/0.010)
198 rods
KB 2.2 turbo pistons (+18cc Dish)
Double roller timing set
Stand pipes in the lifter Valley

76 Head
Ford 300 valves and seals
Hardened seats
Ported/polished
340 Springs

I'd tell you about the injeciton setup, but I want to keep it under wraps for the time being.

Any thoughts on the motor/compression issue?

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Brett

1963 Valiant Vert(225 /6)
1964 Dart GT Vert(225 /6)
1965 Dart GT (273)
1966 Barracuda (273)
1966 Dart (225 /6)
1970 Charger R/T (440)
1972 Satellite 4 door (318)
1974 Valiant 4 door (318)
1981 Ramcharger (318)
1987 RamVan (225 /6)

D

What cam are you going to use?
Static compression / cylinder pressure and cam numbers go hand-in-hand.
DD

I'm going to order the cam once I've got everything else figured... Match it to the rest of the hardware, as it were.

Mine was running at about 11-1 on pump gas. The long rod seems to make the motor very resistant to detonation. I started with a 268*/.460" Racer Brown and ended up with a .528" Mopar cam.

_________________
Official Cookie and Mater Tormentor.

I have 12.5 to 1 in the one I'm building now, running an Isky 505 cam. (.505 lift)
my guess is that it will have 195 psi of cranking cylinder pressure, I plan to run this one on race gas .
DD
http://www.dutra.org/pictures/engine/du ... slant6.jpg