I'm building up my new motor right now, with plans on doing a fairly decent sized nitrous shot, and I'm just trying to make sure everything is up to par with what I'd like to do. My ultimate goal would be a 2-stage 250 shot or so, would this stuff hold up to it?

The motor itself is a 383 stroker, forged everything except a cast Scat crank, Sealed-power moly rings, Melling 155 oil pump, etc. Compression should be around 11.0:1.

It has stock heads and intake, both professionally ported. Roller rockers, 236/242 Comp cam, stock lifters, hardened pushrods, 918 springs, Walbro 255 pump, 42lb injectors. I'm buying TR6 plugs soon, will be running 92+ octane, and I'll have the necessary nitrous stuff (window switch, fpss, retarded timing, etc).

I guess I'm wondering if anything I have (or don't have) is holding me back from "safely" spraying in the 250ish range. How high could I "safely" go with this setup? Anything else you'd recommend before I hook up the bottle? It'll probably be a wet setup, not 100% sure yet though.

 

what is the exact piston and were the rings gapped for nitrous?

for 2-250 you might need to run a 7 or 8 heat range plug
Also the 255 pump is starting to reach max flow capability...you might need either a higher flowing main pump or add a dedicated fuel cell.

is the rest of the drivetrain up to par to handle the power you are going to make?

 

SRP 16cc Forged pistons. I'm not sure what the rings are gapped at, I bought the motor already assembled.

What would the plug number be?
I could look into a second fuel cell, depending on cost. I'm assuming it would just be cheaper to get a stronger pump?

The clutch is a Spec 3+, so it should handle it pretty well, however I still have the stock 10 bolt, and tranny (T56). I don't plan on spraying off the line at all, until I upgrade those parts. I'll be doing a 9" conversion this winter. How much can I push the stock tranny?

 

when you said 2 stage did you mean like 2 125 shot's or a 175 and 75.
I think you need to break up the 250 shot or your going to have some issues. It will also help out with traction. For this i would go wet, a dry setup will be a lot of work. Currently the only true lt1 dry kits are NOS and Zex.

The t56 is bulletproof, will not literally but if you read a lot in the forced unduction section you ll see many guys with real high numbers running them.

A few have some upgrades (viper input shafts, internals,etc) but the great majority between 450-700rwhp are stock other than a clutch and ds.
I dont see your 2 stage 250 being a problem but you never know.

Nitrous outlet has some specials going on so I would take a look at them (the other guy who is helping you).
Nitrous express is another good company. Tnt makes a few you may like. Look around, theres lots to pick from.

 

I already have 3/4 of a nitrous setup, from a dry setup I had on my previous Camaro. Mostly NX stuff, as it's treated me well.

And that takes a load off my shoulders, I never had any idea what the T56's would stand up to.. Hopefully it'll take the abuse for a couple years, or so.

As far as the 2-stage goes, I'm not sure. I haven't done a whole lot of planning on that yet, as I'm just trying to get the motor together and in right now. It'd probably be a 75 and 175 or 100 and 150. Until I upgrade the rear, I'll probably only do a 100 shot or so, just to have a little more fun at the track.

How much will a one-piece steel DS take? I'm assuming it'd be stronger than the aluminum one?

Thanks for the info!

 

I would suggest verifying ring gap before spraying...if they are to tight you can damage the motor

A dedicated fuel system is approx $700

To handle 650+ HP on a single system would require upgrading to something like an Aerootive A1000....this would require changing everything in the fuel system. Pump, Lines, Filter, Regulator, and a pump controller if you plan on driving it on the street. Prepare yourself for around $1000 to go this route.

I would get with someone like Six Speed Inc. to go over these details. But I can tell you right now your drivetrain is gonna until you can upgrade it. I drove mine around for a year with a 396 150 shot , stock T56, and ten bolt.....always felt paranoid I was gonna break the car and it wasn't any fun. Now as soon as the 12 bolt went in, the party was on

 

I'll try finding out the ring gap now, and let you know.

This may be a little off-topic for another thread, but would you mind PMing me about what I'd need for a dedicated fuel system?

As far as the drivetrain goes, I'm not too concerned as of yet, since it's not a daily driver, and I don't plan on driving it that much. And I'm "planning" on babying it, but we'll see how that goes..

 

We have a couple different options for fuel system for the 4th gen F-bodies

http://www.nitrousoutlet.com/catalog...del=73&dept=11

 

Is the motor in the car already? If not, are the heads on the motor? If the answers are no and no, you might be better off. I know it would not be cheap or easy, but I would have the rings gapped correctly for the spray if they are not already. What head gaskets are you using and if the specs of the motor will allow are you able to run a thinner gasket to help the compression a bit or are you already there? And the only other thing I can think of right now is, most if not all, will tell you not to go over a 200 shot unless your using a direct port set-up.
PS, I have an aluminum DS right now with the motor putting out 468rwhp through a stalled auto. I am by passing putting the stock steel shaft back in, and am going with a CM Strange DS. Just one more thing I won't have to worry about. With an M6, I think that would be a very good idea.

 

^^Thanks Ray

The motor is not in the car yet, and does not have heads on it yet. I guess I'm not dead set on going for a huge shot of nitrous, at least not any time soon.. What would be the limit then, assuming my rings aren't gapped wide enough? I don't want to go through the trouble of doing that right now, especially since I'm hoping to have it up and running by July 4th. On motor it'll be 75-100 horses stronger than it was anyway, I'd be fine with that for a while.

As far as the DS goes, if I go with a 9" setup, will I need a new DS anyway, or will my stocker still work?

And I plan on using Cometic .029 gaskets, but I haven't bought any yet. The block has been decked .010, and I think the heads were decked slightly as well. Any recommendations on gaskets?

 

200 is about the limits for SRP pistons assuming the rings aren't to tight. I have run both the Fel-pro and cometic gaskets.....they both work fine, if you run the cometics make sure both the heads and the block are surfaced for them.

I would start small on the motor, somewhere around a 100 shot as it will run pretty strong at that level.

A buddy of mine has a 93 camaro with a 383, (SRP pistons), as cast AFR 195's, TH400, and a 100 shot. His car runs 10.3's @ 130mph

http://www.youtube.com/watch?v=RuKiVh1WYbc

 

The ring gap is .016. Too tight?

And yeah, I'll probably start out with a 75-100 shot, and go from there. I don't plan on spraying much anyway..

And what do you mean by making sure they heads and block are surfaced for Cometics?

 

.016 is pretty tight if I am remembering correctly. The cometics need a certain RA (I believe that's what it's called) to help them seal. If the shortblock is together and you didn't have them put the right finish on the decks you aren't going to be using those gaskets. Or, you could take it apart because you need a larger gap anyways for the bigger shot and have the correct finish put on the block.

 

copied form another thread...

https://www.camaroz28.com/forums/sho...d.php?t=601612

I would not spray on those rings....the heat and cylinder pressure of nitrous could cause the rings to butt together and break the ring lands off the pistons.

 

Alright.. That sucks..
I'm glad I found this all out..

What's all involved to take it apart and regap them? (it's still just in shortblock form). I'm assuming I'll want to have it done by a shop? Any idea on cost?