1INSANEGTO

iTrader: (13)

Ok I am lost here. Never really kept up with the info.

Here is what I know about my motor.
346ci
Diamond -8.66 cc dish pistons
Lunati pro mod rods 6.125 length
Stock crank polished

I am sure someone has did this before


The calculation for determining compression ratio works out like this:
CR=(D + PV + DC + G + CC) / (PV + DC + G + CC)

CR = Compression Ratio
D = Displacement
PV = Piston Volume
DC = Deck Clearance Volume
G = Gasket Volume
CC = Combustion Chamber Volume

http://www.circletrack.com/techartic...e_compression/

NassyVette

iTrader: (22)

List your cam specs for accurate scr and dcr, also what is the compressed thickness of your head gasket, your cylinder head volume as well as deck height. We need all of the info for an accurate compression ratio and quench.

1INSANEGTO

iTrader: (13)

Cam specs. 231/226 601/591 115lsa

Deck height. Stock LS1 Block
Head gasket std
Cylinder head volume; not sure what CC they are

tt427ls1

We need to know the CC of the head. Your going to have to find that out. Makes it alot easier

stevieturbo

http://www.csgnetwork.com/compcalc.html

1INSANEGTO

iTrader: (13)

ok.

Enter Piston Dome Volume In CCs Negative For Dished Pistons (Use '-') -8.66
Compressed Head Gasket Thickness 0.021
Piston Stroke Length 6.125
Head Gasket Bore Diameter ?????
Cylinder Bore Size???? 4.030????
Bore/Stroke Designation Type
1 = Inches
Piston Deck Clearance Negative If ABOVE Deck (Use '-') : ???????


Heads are LS6 Patriot performance stage III Heads.

ibgoatin

iTrader: (1)

maybe these will help

http://www.c5frc.com/calculators/Co..._Calculator.htm

or this

. http://www.rbracing-rsr.com/compstaticcalc.html

1INSANEGTO

iTrader: (13)

What is the deck height on a LS1? Thats the only number I am missing

black98ws6ta

iTrader: (77)

Standard is around 9.420....but if your block was decked it could be different. Also I dont think your compressed thickness on the gaskets is .021 unless im missing something, most gm gaskets are .056?

Brains

iTrader: (7)

How are you guys calculating DCR? I'd be curious where my setup stands...