Mr D.

I have been figuring my compression ratio using Desk Top Dyno and come up with 11.1:1 (not sure if this is static or dymanic), but when I use another calculator I come up with 9.02:1 (static compression ratio) using the same numbers. I also read where the DCR is always lower than the SCR. Here's what I got for numbers:

Cylinders: 8
Bore: 4.280
Stroke: 3.760
Combustion Chamber Vol: 100cc
Head Gasket Thickness: .043
Head Gasket Bore: 4.370
Piston to Deck Clearance: I was using 0, Desk Top Dyno uses min # of .100
Dome Pistons: .140, Speed Pro, Forged, L2300 / F30

Mech Cam: Numbers are @ .015 (seat to seat)

Lobe C/L: 112.0 Intake C/L: 108.0

In Dur: 276 EX Dur: 284
In Lift: .544 EX Lift: .539

BTDC: 30.0 ABDC: 66.0
BBDC: 78.0 ATDC: 26.0

I want to make sure a new set of Edelbrock, Alum Performer RPM heads (100cc) is what this setup needs (427). I'm sure it is but need help to check my math before I drop 2K on heads. I'm thinking the 11.34:1 is the correct number????

Thanks



[Modified by Mr D., 2:28 PM 5/8/2004]

MotorHead

L2300 have a dome volume of 16.8cc and with 0 deck your CR will be 10.4:1, if you have standard deck height the piston will be 0.018" in the hole with a you will be at 10.05:1 CR :D

Mr D.

Thanks MotorHead, I knew my numbers had to be wrong somewhere. 10.4 sounds just about right. :)