Reply to "compression"

joules"Racing is Life, anything before or after is just waiting" - Steve McQueen

quote:
Originally posted by 4V & Proud:
17.7 bar = 256.716729 psi

18.7 bar = 271.220499 psi

i don't understand how these seemingly arbitrary bar figures relate with no knowledge of when the intake valve closes and the actual dynamic compression stroke begins?

256.x & 271.x psi are a good 100 psi over normal cranking cylinder psi findings

Correct I don't know the cam specs from Rene's information, nor any other internal losses (rings sealing) I simply posted an example of an ideal theoretical calculation if his dynamic compression was 9.5:1.

A leak down test provides for far more meaningful information.

7/26/186:51 PM

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