M1SERY

in the process of cutting my pistions for my new up grade, been reading bout dynamic compression and detonation in cylinder on pump gas

Q: is, did i over shoot for running pump gas
STATIC COMPRESSION RATIO 11.503

DYNAMIC EFFECTIVE COMPRESSION RATIO 10.033

redtan

iTrader: (5)

Whoa whoa whoa, 10.0 DCR? That is wayyyy to much for pump gas.

SCR of 11.7 and DCR in the high 8s should be ok with a good tune. More than that you're really pushing the limits of pump gas, unless you mean E85 pump gas.

M1SERY

is there any way i figured it wrong? do u have a compression calcalator that u use on line

Grr

iTrader: (2)

MS4 has a IVC of 74.5*, your dynamic is right around 8.4

Static compression ratio of 11.50:1.
Effective stroke is 2.55 inches.
Your dynamic compression ratio is 8.39:1 .
Your dynamic cranking pressure is 169.07 PSI.

chrisfrost

iTrader: (8)

Wallace Racing has every engine and car calculator You will ever need and many more . They have maybe 150 or so diff calc ,,,,,,,scr dcr ,,,,,and effective cr ,,,,,,all the cam calc's ,,,,,1/4 and 1/8 mile calcs ,,,,gear change ,,,,,etc,,,,free

ckpitt55

iTrader: (4)

that static compression is fine, all you need to do to lower your DCR for the same SCR is advance your cam. but if you're at 8.4 as Grr calc'd out, you should be fine.