KILLER-LS1

iTrader: (18)

Hey guys, I finally plugged my cam specs into a dynamic compression ratio calculator and I got 9.67:1 Static and 7.3:1 dynamic ratio.

I know most people like to stay around 9.5:1 static for street cars, but what dynamic ratio is best?

My cam was custom spec'd by comp and it is a 231/227 .617 .613, 116 lsa
They designed it to help my turbo spool quickly

norotor7

iTrader: (2)

that's a lot of intake duration.

KILLER-LS1

iTrader: (18)

haha oops, I fixed it. 8's look like 3's when youre tired LOL

KILLER-LS1

iTrader: (18)

C'mon guys... I know someone has some input on this

98BLOWNZ28

iTrader: (10)

I believe its around 7.8-8.5:1 dymanic for a street car so that it doesnt have a sluggish feel to if from my understanding.
dont quote me on that though.

No Juice

iTrader: (11)

just to give you a comparison a stock LS1 with 10.1:1 static has 8.27:1 dynamic

Phil99vette

iTrader: (11)

on what type of gas and are you going to run methanol injection?

i6overboard

iTrader: (3)

Does anyone know where that would put you in cranking compression?

All i can reference to is a 5.4 whipple SC mustang motor that we had in the shop. Came out to 180 to 185 and he was pushing 18 p.s.i. on pump 93.

98Z28CobraKiller

iTrader: (17)

Not enough info to determine whether that is a good cam or not for your application. Cubes? Heads? Intake? Exh manifolds? Hot side piping size? Exh housing size? DP size? I wouldn't spend much time worrying about DCR numbers. How to calculate an accurate number is subject to debate and doesn't mean a damn thing at the end of the day.

kmracer

iTrader: (1)

i'd have bullet spec you a cam, not comp.