would hyper pistons hold up to 350HP with a 150 shot of nitrous? or would i be better off getting forged? im kindof on a budget thats why i ask

 

Forged. Better off.

Oh yeah, forgot to say, it is possible. Whats more expensive though, catastrophic engine failure or saving up a couple hundred dollars more?

 

Was thinking N/A opening this thread and was going to say completely doable. but if opting to juice and your in the purchasing stage, save a few more hundred and get the forged for piece of mind. I have plenty of buddies running 150 shot on cast piston with similair mtor output that your looking at with no problems, but they have been doing the nitrous for years and have it all to a science so everything is tuned perfectly for LESS CHANCE of failure.

 

Not a problem NA, if you're spraying it go forged. Made 515 on hypers with a 383 a little while back.

 

Hyper pistons will be plenty reliable if you open up the ring end gaps some. .026"-.028" top. .024-.026 sec.
(the piston crown runs hotter which transfers more heat to the top ring.)
normal cast or forged ring end gaps will result in top ring lock
(lifts the top piston ring land)
open the ring end gaps

run cool(er) non- extended tip sparkplugs (2 heat ranges) No bosch or other platinum plugs.
make sure you do not starve the nitrous system or the motor's fuel system for fuel flow and pressure.

go easy on total ignition timing. 32-36 N/A 26 28 on the juice. use the best available highest octane pump gas.
92 octane minimum. mix 50-50 with 110 unleaded if you can get it. (most tracks sell it)

hyper pistons ar plenty strong but shatter when you make a severe tuning mistake (lean mixture, low octane fuel, overadvanced timing)
Forged pistons althou they don;t shatter when they fail just take longer to get destroyed. (pinched ring lands)
the result is the same (rebuild)

a 150 shot is not going to cause a problem as long as you follow the basic N2O tuning rules.

 

awesome, that is some good info right there. i might just save up for a few more weeks to get the forged pistons because this will be my first nitrous set up and the 2nd motor setup ive run in my camaro and im still kinda new at the high HP game and i dont want to chance it. i just figured if hyper pistons could hold up no sweat id go for it, but if they are kinda iffy with nitrous id rather not chance it. i know im sure i could pull it off but better safe than sorry



thanks for the good info it really helped, i appreciate it!

 

if you plan ahead and set the motor and fuel system up to support the nitrous in the first place (buy a dedicated N2O fuel pump and feed it with its own fuel line and tank pickup) you'll have no problems.

Do not engage the nitrous at part throttle or at idle EVER.

 

dang IHI!nice sig.!
wish i lived closer,i'd love to check your car out!
phantom,if it's just a few weeks and you're new at the spray game,there's really no question is there?
best of luck!
Eric B

 

yep thats a good point. and the only time ill be using it is when a new car comes to town that wants to fool around on the streets and i think itd be a good matchup, which wont be very often, probably never, or at the track, people around here see a bottle in the back and they still

 

I agree (as I have looked into this before). If a decent amout of n2o is concerned, you should do it right. Ever see an engine blow up from an n2o shot because the engine was poorly designed? I have a video clip of one somewhere on my hard drive - 175 shot to boot....

 

yeah at the races last summer a VW golf ****ed up and hit the nitrous at redline, blew the intake manifold clear off, spewed coolant all over the track, took em like 45 minutes to clean it up, everyone got pissed



just as kindof an update, im ordering my speedpro powerforged 4.030" flat top pistons tonight or tomorrow, thanks for the advice everyone!

 

iknow this is a month+ old, but you really need to know that forged pistons may be better, but if your bottom end isnt forged (crank+rods) pistons would really be a waste of money. why buy pistons good for 1000 hp when your rods+crank if not forged are good to maybe 600 running it very thin? a forged bottom end is the best route. if nothing else a forged rod+piston combo is necessary for a 150 shot. it hits pretty hard and cast anything doesnt like it especially at elevated power levels.

 

Basically all SBC rods are forged. The cast crank will survive, if prepped right. The RPM's are what will kill it. Keep them down and the crank will live.

 

Most of the time a broken rod can be attributed to:

Detonation
Improper bearing clearances, i.e., it locks up
Stressed bolt due to improper torque

High RPM breaks are usually because the bolt breaks first. The faster you spin a motor, the heavier the piston/rings/wrist pin get and thus, the harder that they're all pulling on the big end of the rod. The only thing stopping that slug from slamming into the head are those two little 3/8" bolts.

Factory rods are not forged.

 

Actually you would be surprised.

 

enlighten me.

 

Im confused why everyone is saying factory rods are not forged. The only factory rod I know of thats not forged are the PM rods and these are very durable in themselves. Pontiac was the last company to make cast rods. Here is a quote from another site.

http://www.holisticpage.com/camaro/parts/connect.htm

I read something interesting once that said the older forgings were weaker than some of the newer type nodular and space age castings. Of course the newer type forgings exceed just about everything out there.

 

factory rods are not all forged. i do know that of any performance mod nitrous is the hardest on a cast bottom end. if it was 500+ hp on a turbo, centrifigul, roots combo or a big inch small block not revving high rpm i waould say fine. smooth application of power. nitrous is a different animal the way it hits the bottom end abruptly. i would reccomend against it. at that power level you are daring to walk a fine line, just my .02

 

Ok for all arguments this is a thirdgen f-body site. Exactly what 305 or 350 engine from a 3rd gen f-body did not have forged rods? Im not sure I would still use them for a nitrous application though.

http://www.hotrod.com/techarticles/82378/