[HWYSTR455]

You can't curve 'out' det on a street iron head 10.8 engine on 92 pump gas, not likely on a 10.3 engine, and it's a fine line on a 9.8 engine. Once you back it off so it doesn't ping, not only do you loose power, but you run into overheating issues, for one.

Good catch Cliff, yeah, someone should have mentioned the zero deck thing, especially on the the TRW/SpeedPros. They do end up in the hole, seen as much as .24 before!

What many don't realize is the fact that you don't loose hardly ANY HP going from say 10.75 to 9.25 SCR, like what, maybe 5% - 7%? I don't think even that much. If you pull off a 440HP 400, 5% is what, max, 25HP? You can make that up somewhere else, and it's certainly better to run a on-tune 9.25 engine than a 'crutched' 10.5 engine.

Real issue with running lower than say 9.5-9.25 is the cam selections. That's where people 'think' they loose power by dropping SCR.

I don't feel there's much of a drawback to dishing, even if later you choose a aluminum head. Just get the 72cc, could even run a thin gasket if you want more. Use a profile that builds pressure too if you want.

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