How much NOS?
 

Hey guys,

I've got a 76 302 block with 76 rods, an 87 crank, and TRW L2482F30 forged pistons. It's bored .030 over and has new rings, bearings, it's been balanced, all the shiz. I've got a comp cams 292H which has about a .530 lift. I've also got a 670cfm carb with a Weiand stealth intake. How much nitrous do you think this bad boy could handle? The car is stripped out and it's probably rarely going to see street use. Since I'm running a carb, will I need a wet nitrous setup or dry? Tell me what I should do guys. Here's the engine about halfway through being built, just for grins.
http://students.ou.edu/B/Michael.C.B...ng/engine1.jpg

Since those seem to be stock replacement pistons, I wouldn't put any more than a 150shot of nitrous on it.

oh yeah, and here we call it nitrous, not NOS :cool:

I wouldn't go any further then 150 at first the pistons will take more but with the dual plane intake you are asking for trouble spraying more then about 150 without VERY closely watching your mixtures. if you had a single plane or that intake distributes the 150 shot VERY well then i would go no more then a 200 on that intake and 250 at the very most on a single plane the 250 will be severely sstressing the whole motor... assuming you are making 300 plus 250 put you at 550... more then enough to split a stock block and so on down the line. The HP level i am talking about is actual HP gained not HP rating by the manufacturer.