03 cobra short block+14lbs of boost on 2v head without meth?

[dwtjr3]

Can this be done or will the CR be too high for that much boost. Car will be tuned on 93. I am running 11lbs of boost now but plan to upgrade to a si trim which would increase boost by~3lbs so what do you guys think?

 

[01yellercobra]

What's your current compression ratio? I'm at 9.5:1 and ran 14psi on 91 octane with no issues.

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[JP_Stang]

What is your compression ratio with the 2V heads on the 03 Cobra short block?

 

[1QUICK10TH]

You need to find the volume of the combustion chamber of a 2v but long story short I think you'll be fine

 

[cinch1985]

Lol it's the same. Both use a 18cc dish

 

[1QUICK10TH]

Yeah but the combustion chamber is probably a diff size, compression isn't just about piston dish

 

[1QUICK10TH]

Assuming your using a p.i. 2 valve head your combustion chamber is 42cc, smaller that a cobra which is 58cc I believe. That being said your compression should be somewhere in the 9.0-9.5:1 range. Keep your iats down and 14psi should be ok with 93 octane and a good tune

 

[triple-s]

you'll be fine I'm running 19 pounds on ported 2v heads and a cobra shortblock!

 

[dwtjr3]

Sorry for the late responses. And im not sure of my current CR its stock so ~ 9:1? And Ok great thanks triple s sounds like ill be fine

 

[cinch1985]

I was saying that it will be the same as stock. Which is 9.5

 

[dwtjr3]

Ohhhh ok alright cool thanks man idk that stock was 9.5:1 i thought it was 9:1 thanks for the info