Highest C/R on 93 octane

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Oct 24, 2004 | 01:54 AM

Boostaholic

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From: Boise, ID

Highest C/R on 93 octane

I have a HPE built 408 stroker right now, I'm wondering if I wanted to raise the compression ratio and make it a N/A soild roller how high can I raise the compression ratio to on pump gask (93 octane).

Is there a formula or chart for this? Also, I'm not 100% clear about how the dynamic compression ratio plays into things with high compression pistons.

Oct 24, 2004 | 10:23 AM

Ben R

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From: Fort Collins, CO

You really should call Erik at HPE and talk to him about this.

Oct 24, 2004 | 11:14 AM

SpeedDemon

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Quote:

Originally Posted by term

Definitly talk to the builder of the engine, but to answer your question, there is no formula. There are a million things that can come into play. Some of them are Cam overlap, quench, combustion chamber design, etc..

Talk to Erik. I am sure he can help you out.
Good luck,

Oct 24, 2004 | 03:48 PM

Boostaholic

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Alright, I'll do that, I was just trying to do some homework before I called him.

Oct 24, 2004 | 03:49 PM

Pro Stock John

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I was 12:1 with my old iron 422ci, I would not go higher. I had it set with 25 degrees of timing at WOT, and in July I ran it with a few gallons of 100 mixed in.