I Was wondering what felow HT members run on they higher comp motors... i am runing weisco 9.8.1 compresion on SC61.. Anyone with something similar?

 

curious

what are your opinions regarding a safe power level for a pump gas tune on a 10:1 built motor?
400 whp just doesnt seem as safe with a 10:1 motor as it does on 9:1

 

What kind of fuel are you thinking of using :-) ?

Is the block sleeved ?

Those are two important factors.

 

Based on what the more informed individuals say, the limits of a given motor are guaged more in max power if can make safely, not max psi. The problem with high comps is that you get much less room for error in tuning. Obviously it'll be safer making 300hp on a stock LS with stock comp than 300hp on an stock LS that has a shaved head, deck, and thin head gasket.

I know that most people will say 13-15 psi on a b18b1 is pushing it, and usually gsr's and b16's won't run over 10psi without somewhat of a risk. That is with stock internals, of course, and good tuning. The other point that matters is if the turbo is a bit bigger or smaller than what the motor will run. Running 10psi with a huge turbo on a b16 will obviously be putting more air in the motor than you think, possibly pushing it past it's limits. Having too small of a snail, like running 15psi with t25 on a b18b1, will get you very high IAT's, which can lead to detonation.


It really depends on the motor/internals and the turbo used.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by g2turbo &raquo;</TD></TR><TR><TD CLASS="quote">curious

what are your opinions regarding a safe power level for a pump gas tune on a 10:1 built motor?
400 whp just doesnt seem as safe with a 10:1 motor as it does on 9:1</TD></TR></TABLE>

Huh? Someone who knows what they are doing can tune either to be safe... especially with forged rods/pistons... I wouldn't worry at all about 10:1 at that power level.