chvypwr31

iTrader: (4)

383 sb 12.4:1 cr with 64cc heads how much nitrous do u think i can safely use(yes i kno nitrous is never safe) i was thinkin of goin with a 200 shot.

ZONES89RS

iTrader: (25)

Should go easily with a good tune and even better fuel, with that compression your tuning window gets a little tougher but it is done every day with gear heads around the world.

jmm98LS1

iTrader: (28)

What does the bottom end consist of? Forged or cast internals? 2 or 4 bolt mains? How much ring gap? Lots of missing info here. You can safely use as much nitrous as the parts in the motor are built to handle.

chvypwr31

iTrader: (4)

4 bolt main, forged scat crank,forged h beam rods, ross pistons im not sure exactly wat ring gap is i have it written down at home ill have to look

z28hustle

i dont think a forged crnk would be a necessity for the 200 shot but it would be nice if you wanted to go bigger in the future...

chvypwr31

iTrader: (4)

i already have all the stuff thats my buildup, but im not gonna go with a cast crank with the numbers im shootin for. this isnt gonna be a street motor.

jmm98LS1

iTrader: (28)

With those parts and rings gapped for nitrous, you can dump some serious squeeze in that thing. A 200 shot will be cake. Make sure you've got the supporting fuel system and a good tune up and you're golden.

whytryz28

iTrader: (28)

+1, i was running a 150 shot pump gas on my 9.5 c/r cast internal 327 for about 2 years before i decided to pull it for a 383 build.

Villain281H

iTrader: (5)

a 200 shot if jetted and tuned correctly should be good with your supporting cast of parts. Just remember to watch the fuel and bottle pressure when you make a pass and don't ride it out if either looks iffy.

Derek

Chevy406

iTrader: (12)

Don't forget to check your ring gap. It is very important that you have enough gap for the additional heat generated with nitrous. Fuel delivery is critical (as others have mentioned). I would highly recommend adding a low pressure cut-off switch to your fuel supply line. Also make sure your ignition system is upgraded. You will need to pull about 8° of timing to run 200 hp nitrous. Spark plug temperature range should be 2 ranges colder than recommended for NA.

4348rd

iTrader: (4)

sounds like a nice set up.

chvypwr31

iTrader: (4)

id have to use about 116 octane race gas rite or would i have to go higher than that.

Chevy406

iTrader: (12)

It depends on your tune. I have around 10.75 static compression ratio, and have sprayed 200hp running just 93 octane. Made 660 rwhp on pump gas. But I was using the NOS recommended jetting, which put me around 10:1 AFR. This spring I plan to lean that out a little to more like 12:1. Even with your higher static compression ratio, I can't see you needing 116 octane with just 200 hp jetting. Start smaller on your jetting, and pull the spark plugs after each pass for a while to look for detonation. If everything is OK, then step it up slowly.

chvypwr31

iTrader: (4)

step it up slowly on the jetting or the octane of the gas.