Boostaholic

iTrader: (4)

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.

Ben R

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

SpeedDemon

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,

Boostaholic

iTrader: (4)

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

Pro Stock John

iTrader: (34)

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.

Race Car Driver

11:1 safely.

itchygomey98

iTrader: (2)

Ummmm I think it's going to depend on you dynamic compression ratio - not the static compression ratio.