Can someone help me out please? I have 9:1 compression pistons with the N/A Cometic HG that is .030 thick... What would my compression be? I have no clue on how to calculate that. I did get the deck shaved just a tad on the block and head(Ill have to give you that info when I find it)
So if it were a stock block and head, what would my CR be with those mods?

Thank you.











~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

If you know all the required numbers, this calculator will get you the correct CR. It does, however, require some things you might not readily know, such as piston height (above or below deck at TDC) and combustion chamber volume. But all this data is probably available. You will just need to do a little research.

^^ Thanks man.. Yeah looks like Ill have to do a little more research to figure out some of the required boxes to fill out.. Hmmm..











~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ

http://www.rosspistons.com/calculator.php <---- Their new calculator SUCKS

LD9

Bore in: 3.54
Stroke in: 3.70
Head cc's: 60
Gasket Thickness in: 0.047 (stock gasket)
Deck Height (Put .0001 for zero deck) in: .0001
Dish or Valve Pocket [-] or Dome [+] cc's: -2.6
Number of Cylinders: 4





Edited 1 time(s). Last edited Tuesday, September 12, 2006 10:27 AM

SPD RCR Z - '02 Z24 420whp
SLO GOAT - '04 GTO 305whp
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^^Thanks.

Whats the piston stroke length on the LD9? Thats the only field I have left to fill out













~2014 New Z under the knife, same heart different body~
______________________
WHITECAVY no more
2012 numbers - 4SPD AUTOMATIC!!
328 HP
306 TQ