Can anyone tell me my Compression Ratio with -6cc dish pistons in a 96 cobra? I have a forged bottom end and stock heads
Compression Ratio Question
- Thread starter svt_steve_svt
- Start date
should drop it .45 so if stock is 9.85 then 9.4
I never understood how the 96-98s came out to the advertised 9.85 compression as my math came out to 10.5
In that case you'd be at 10.1
Here's diamonds calc and the values. These are ottomh so you probably need to verify.
diamondracing.net
8
3.552
3.543
5.933
3.62
0.036
8.937
0.060
52
6 <- stock dish is 3, 03/04 cobra stock is 17
-0.008
Its been a couple years since I've built a 4v engine but these are the numbers that come to mind.
I never understood how the 96-98s came out to the advertised 9.85 compression as my math came out to 10.5
In that case you'd be at 10.1
Here's diamonds calc and the values. These are ottomh so you probably need to verify.
Compression Calculator
Instructions: Enter a value in the un-shaded boxes below as they pertain to your engine. Note: For pistons BELOW the block @ TDC - value in box must be a POSITIVE number (.000) Note: For pistons ABOVE the block @ TDC - value in box must be a NEGATIVE
8
3.552
3.543
5.933
3.62
0.036
8.937
0.060
52
6 <- stock dish is 3, 03/04 cobra stock is 17
-0.008
Its been a couple years since I've built a 4v engine but these are the numbers that come to mind.
Yeah I thought the same, I don’t understand how the stock CR is that low
True.
Good news is that B heads aren't are sensitive to compression as the C heads are.
Good news is that B heads aren't are sensitive to compression as the C heads are.
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