well I'm taking the engine out of the camaro atm and taking it apart to clean out the metal i got into it thanks to a POS comp cam lifter, since im gonna have the pistons out im thinking i will put forged pistons in and some high str rods. my block still has the stock crank in it with 2 bolt mains.. will i be safe with pistons/rods? what other things tend to fail when shootin that much spray?

 

I would go with a forged crank and splayed 4 bolt mains while you are at it. Better safe than sorry.

 

Since you didn’t really tell us what you’re building and the way you wrote that I’m going to assume that your just freshening up what’s there and hoping that it will live with a 250 shot. To run those times your making about 250-300hp (although I see parts to make closer to 400hp…) and a 250 shot, so maybe 5-600hp.

2 bolt mains will live, though aftermarket 4 bolt is always nice. Usually the “time to do something about this” is in the 500hp range. Same deal with the rods, good, reconditioned rods will work, but you’re really in the range that you should be looking at something bigger and better, although if you don’t rev it too high you’ll be fine. You’re also in the same boat with the crank. I’d basically spend the money if you have it, but there’s also a lot of people getting away with something similar with basically factory parts.

My biggest concern would be a proper forged piston and some good rings, maybe even a N2O piston with the top ring moved down to keep some of the heat out of the rings.

 

Make sure the rods have really good bolts such as ARP. Rods usually fail first it seems like.

 

250 is too much, i wouldn't go over a 150 shot if i were u.

If u want a 200+ shot u must go with atleast a 4bolt main block (early 70's "010"), and some kind of forged internals, but thats the minimum..

I have a 4 bolt block, aftermarket heads, Everything is studded, Heads are O-ringed, Lunati 'pro mod' rotating assembly (forged w/ flat tops) etc.. Also i'm running a separate fuel system for the nitrous, something else u might wanna think about....

 

I've seen people spray more then 250 at a stock bottom end. It just depends on how good your tune is and if you're making sure that it's running perfect.

I don't recommend it to guys who are new to N20, but it is possible.

 

I never said it wasn't possible to do, i just recommended he DONT do it with a stock 2 bolt main block and stock crank. Its possible for him to do whatever he wants, he could spray a 400 shot, but doesnt mean its gonna last. Remember just because u read something or you see others doing it doesn't always make it 'ok' to do.. If ur building a motor to handle a 250 shot of nitrous, build it right the first time, dont skimp and rely on the nitrous to make up for your loose ends, it won't last.. 250 hp at the touch of a button is ALOT of power on tap, getting 400hp out of a 350 is easy, add 250 to that and now ur at 650, it will not last very long

 

If you don't know what you're doing.

 

thanks guys, Im starting to think such a large shot would be too much in other ways also.
I still want everything to fit under the stock hood, with a 250 shot I will want to go with a single plane intake which raises the engine height that much more, then im adding a inch for that n2o plate and i'm not sure if i even have an inch to work with as it is.

if all i did was pistons on my stock bottom end would i be safe with a 150 shot?

whats a good complete kit that will let me jet from 75-150?

 

Don't hold me to it but i feel a 150 shot is addiquate for a stock (ish) 350, no more than that..

 

It'll run good with a 250 shot. But your stock crank will not hold up long running steel rods. Like SnkSknrZ28 said, I wouldnt go over 150. Nitrous is like dynamite on a crank. Aluminum rods tend to absorb the shock and gives your crank longer life... Just my $.02 And the NOS Sniper kit would be perfect for your car. Its only like $360 something..