Compression ratio??

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Dec 9, 2010 | 07:38 PM

bugy

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From: Mexico

Compression ratio??

Hey, Does anybody know what's the maximum compression ratio in a LS1 using premium gas with like 92 octane?? according to me it is like 11.0:1
i wanna more opinions....

Dec 9, 2010 | 07:54 PM

KCS

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That depends on a lot of factors, so there really isn't a specific right or wrong answer. Some people have done over 12:1 on pump gas, but others say you're giving up a lot of power because you have to compromise the tune to make it work. I'd say 11:1 is a good number.

Dec 9, 2010 | 08:02 PM

S10xGN

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You need to find the compression ratio calculator on this site (someone on here built it) and plug in your numbers... You'll want to find your dynamic ratio, that will be more important than the static ratio.

Dec 9, 2010 | 10:34 PM

SOMbitch

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http://www.kb-silvolite.com/calc.php?action=comp

Shoot for 8.7 but 8.5 is perfect IMO because if you get bad gas etc...you have wiggle room...

Dec 10, 2010 | 11:54 AM

1SLwLS1

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I second the 8.5 DCR, which could be all over the place for a SCR number.

FYI, I am at 11.5:1 SCR and 8.3:1 DCR

Last edited by 1SLwLS1; Dec 10, 2010 at 02:10 PM.

Dec 10, 2010 | 12:17 PM

KCS

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From: Conroe, TX

Quote:

Originally Posted by S10xGN

You'll want to find your dynamic ratio, that will be more important than the static ratio.

I wouldn't go that far. SCR and DCR go hand in hand. I really don't think one is any more important than the other.

For example, say you're wanting to get a DCR of 8.5:1. If that's all you were worried about and you don't pay equal attention to the SCR, you could easily end up with a lame *** engine. Why?

Dec 10, 2010 | 01:08 PM

bugy

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From: Mexico

I'm interested in SCR and of course this is a strip/street engine, carburated, using good fuel pump, proper cam, with 11:1 SCR, manifold, etc..
so i think 11.5:1 is good
thanks guys

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