Quote:
Originally Posted by Mark_Dorman
So I was thinking about just doing the webcams 294 grind and running 10.8:1 compression pistons with a .020 overbore. I talked to (message convo) kentsvision, the guy who made 148.3 whp from his 5sfe, and he said he ran a lower compression (because he was originally going to go turbo) with the stock ecu. If you think the higher compression wouldn't require serious tuning then I think I'll end up going that route. I'm gonna assume I should hit over 150whp with a mild port and polish and a basic supporting setup. If I could run 87 or 89 octane with that setup without detonation I'd be stoked. So you don't think that'd be a problem with a mild cam and higher (but not too high) CR??? Thanks...
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In my opinion it would take a longer duration then the 294 to really have the effect of letting you use a full grade lower octane fuel but still you might be able to use 89. We don't have a lot of data for high compression 5sfes to pull from. You'll just have to see on that one. Remember that the only 5sfes to get near 150rwhp so far are tuned. You should at least be in the 140s though.