I am rebuilding my motor and was wondering if running a 12.5 compression piston would be safe along with nitrous. I will plan on running any where from a 75-150 shot hopefully direct port. I am also going to buy a set of skunk2 stage3 cams and the complete skunk2 valvetrain. Just wanted to get some info before i go out and spend all my money.

 

it all depends on pistons you choose and how well its tuned.

if youre talking about some factory OEM PCT,CTR,ITRs or something like that then no but if it is a forged unit then yes i would do it. simply because at that level of nitrous, cylinder temps tend to get a little too high for cast pistons and they melt even with alot of timing pulled and good tuning.

nitrous loves compression, the more the better the both work. but it has to be able to hold the pressure

 

I agree with everything you said except for this statement which I seem to see people saying frequently:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrbsponge &raquo;</TD></TR><TR><TD CLASS="quote">nitrous loves compression, the more the better the both work. but it has to be able to hold the pressure</TD></TR></TABLE>

Nitrous is no different than boost is as far as an engine is concerned. Both will work "better" with higher compression but I would hardly say they would "love it". The ultimate power results will be better with higher compression but it will leave very little margin for error where tuning is concerned. So in short, unless you have a good tuning system like Hondata or AEM EMS, etc and someone that knows how to tune them well, you'll be taking a greater risk the higher you go with the nitrous shot and compression ratio.