06X6spdGTO

iTrader: (6)

looking to put some spray to a Current 406ci SBC with, Hyperutectic Pistons, Stock 350 Rods and Crank, Carter 35 Gph Pump, Flat Tappet 250/260 .532 .555 106 LSA Cam, 1.6 ratio Rockers, stock PushRods, KMotion .750 Valve Springs, Holley 4150 4bbl 850 Cfm Carb, MSD 6AL Ignit, HEI Dist, 2-step, Powerglide (without Rear pump) 1.76 Rear Gear Ratio, 4100 Stall, 9 Inch w/ 4:56's. Running on 103 octane Gas 11:5:1 SCR

Would like to Have a Safe/ Reliable Nitrous set-up Preferring a Dual Stage 150 Shot, just wondering if its possible to spray this much and what nitrous & supporting products to go with.

Car Weight is 2980 lbs. Going in a G-Body.

big hammer

hyperutectic pistons dont really care much for spray... i would go 100 shot

ZONES89RS

iTrader: (25)

Just as you have heard before i am sure, it is in the tune for one, for two, those pistons would handle a 150 probably and be safe, i have seen hypers go WAY past that, but it is a roll of the dice and for how long? Are your rings gapped for tis? The ring lanced decide to weld to the cylinder wall or but and cause detonation, goodbye pistons.

06X6spdGTO

iTrader: (6)

the motor probly has 60+ passes on it now. running consistent 12.00 - 11.60's

ZONES89RS

iTrader: (25)

Juice it and see what you can get out of it

Rogue86

iTrader: (14)

NOS Cheater plate. 63 fuel jet, 71 nitrous jet, 5.5 psi flowing fuel pressure, 26º timing and 110 fuel and a cold plug to be safe. Should be about 150 shot.

AutoRoc

The Edelbrock plates are nice from what I've seen. I've used the Nitrous Express Stage 6 and Zex plate kits with success.. I'd buy a Performer RPM plate from Industion Solutions if I was in the market for a new plate kit. He sells it flowed/blueprinted with his own tunes that are spot on and provides tech support if you should ever need it. I think the Performer plate is 100-250 and the Performer RPM is 100-400hp capable.

I'd have no bad thoughts spraying 150 on that combo.. As always... If you can't afford to break it, don't push it. It should realy wake that 4100 stall up. It will flash up near the 5000 mark from the get-go..

I see springs but no heads listed.. what heads??

I wouldn't go to the trouble of making a 2 stage system for just 150hp... You can integrate a Delay Timer really cheap if you want to delay the hit.

I suggest having a seperate fuel pressure regulator for the nitrous system... Not sure if that Carter Pump can feed the engine AND nitrous system.. Look into it's HP rating maybe..

Run a colder spark plug, probably like an NGK -8 or -9.. depending on what you use now.

06X6spdGTO

iTrader: (6)

Dart Stg 2 Heads sorry.

DarkJuggalo

iTrader: (6)

i would spray it until the floorpan fell off, then have the mad scientist go through it!

crossbredfoxbody

You must understand n20 before you ask yourself how much will my engine hold! There is no piston that will hold up to a big n20 detonation. Just forged pistons will en up with a hole in them instead of shattering like a cast or hyper piston. I personally sprayed a 250 shot to a junkyard 350 for a whole season stock head gaskets stock everything except for the intake carb cam and headers, no prob with a perfect tune. Spraying a 150 shot in 1 stage is perfectly safe with good bottle pressure and the right tune and you will not have any problems. The way I have always had good luck was too swap n20 jet size with fuel jet size by the nos site or book so if by the book fuel jet was supposed to be 62 and n20 jet was 76 make the fuel 76 and the n20 62 for example. You can never do too much research on n20 the more you read the better.

h0t

I have JE SRP pistons and I was told from the tech guys at JE that spraying anymore than a 150hp shot would burn a hole right through them. My guess is that the hyper's will shatter if hit with a dual stage of 150hp. However, seems as though those above me have had different/better experience with them. I'd be concerned with the fuel pump as well, especially if you're going to a dual stage. I may also be worried about the "stock" rotating assembly on a dual stage. Lastly, doesn't look like that cam has enough LSA to take full advantage of a dual 150hp shot, so you're best bet would probably be just a single stage.

supermouse4

I would upgrade to a forged rotating assembly if possible. Hypereutectics don't enjoy much spray, I've seen the results. You could go with a 50 shot and be fine with that. Also, if you want to do nitrous, get MLS gaskets, they do better in sealing the heads to the block.

I agree with others about knowing about nitrous before even considering spraying you engine. Without that knowledge, the engine would be in trouble, especially with detonation and piston damage.

87silverbullet

iTrader: (11)

Your pistons must not have enough compression height is the reason why he told you that. I have hit my stock bottom end ls1 with a 200 and not an issue. We have put a 185 shot on my cousin's stock bottom end 1992 camaro with hypereutectics and never had an issue. Its all in the tune.

87silverbullet

iTrader: (11)

Only imports spray 50 shots! Go big or go home. This a 406 we are talking about here not a 1.6. Hell, I sprayed a 100 shot on 1996 3.1L fwd Cutlass.

In all seriousness 150 is a good safe shot, just have good fuel and retard the timing accordingly. Fuel pump needs to be a bit better. Try to stay in the middle on your tune. Too lean will pop it, too rich will lift a ring land. Have fun

06X6spdGTO

iTrader: (6)

im fairly familiar with the SMACK for LSx (no Expert by any means) but not to familiar with the Carbed systems and safety precautions. I currently have a Forged 347 ci LS6 that i plan on spraying in the near future but i wasnt sure how the Carbed world worked with safety. I know with the LSX there are Timing Tuners, Progressive Controllers, Window Switches, Fuel System Boost-A-Pumps, Fuel Pressure Saftey switch etc.... this motor has been together for probly 11 years now and were are looking to get a little more out of it and hopefully put this G-Body in the 10's on a budget. But Still looking to spend good money on Safety for the Nitrous Kit Of Course