I have an 87 iroc-z that I have been building to run around the 10 second zone somewhere. It ha a 406 small block with a forged crank, eagle rods, trw forged pistons, dart iron eagle heads, victor jr. intake, holley 750 double pumper carb, I am unsure of the cam specs because the PO and person that baught everything lost the cam spec card, but I am putting in a comp cams nitrous hp cam (284/305, 507/525) btw can anyone tell me anything about this cam performance wise on the bottle? My Other questions are, how much of a shot should I run on thios motor, and what NOS brand kit should I buy? I want to buy something from NOS brand just because I have this feeling of trust with them for some odd reason. Since this engine is comming straight from the machine shop, how many miles should I wait before I start using the nitrous?

 

mileage varies with all. i have a nos kit but i would prefer to have NX. they all run the same in the end and the nx kits have better parts.

 

I know you're looking to stick with NOS, but a NX "hitman" system would be cost-effective, powerful and are very high quality. I also hear that Edelbrock's systems are really nice quality and make a ton of power too. A few guys that race the PSCA circuit in classes that are limited to a single, 2-bar, 2-solenoid plate system have had great luck with both NX and Edelbrock.

Just food for thought.

 

Ok so I looked at what NX has to offer and if I were to get their kit I would get the "stage six system" How big of a shot should I run on this motor? I was thinking somewhere from a 150-200. maybe a 2 stage with a nitrous controller????? I have never had a car with nitrous before so I am a nitrous newbie. What ignition should I run with nitrous? How much of a difference does a bottle blanket make? I want a bottle heater and a purge valve on my set up, with that does a blanket make any difference at all? My car has a ford 9'' with a strange center section, and currie axles. Do you think that can handle a shot right off the line? Any idea's or help suggestion, anything, is all welcome. Like I said, I am new to nitrous and want to do it right with a great quality system. I really want a fogger but thats a little (or maybe lot) out of my legue. Thanks for the help so far, it is greatly appreciated!!!!

 

From the description of your motor, it should take every bit of 200hp from nitrous. I'd avoid controllers unless you like rebuilding/replacing solenoids over 6 passes or so.

I've never messed with 2-stage plates, but that would be a far-better option than a progressive controller.

As far as ignition, you mainly need some form of retarding the ignition when the nitrous is engaged. I run a MSD digital 6+ box and have had very good results with it and it's built-in retard.

Bottle heater is really the only "must-have" in the accessory list. Unless you live in a VERY cold climate, I doubt a blanket will do much good.

As far as purges go, I always just purge my unit through the motor and I know lots of people who do the same. Purge solenoids are just one more thing to leak/break/wire in my opinion.

That rear end will be just fine right out of the gate.

Have fun!!

Don

 

Do you have a factory or aftermarket block? That`s the only thing I worry about with my engine and N2O,the walls are thin to start with and I wonder how much cylinder pressure they can take.A friend split a block on 15# of boost. I`ve made one run with the 200 pills (NX EFI kit) and will start to tune it in this weekend,hope i don`t suffer the same fate

I second RoadRacer.

By the way,how do you set up to purge thru the motor?

 

definately get a heater...i use them even in the summer. start out with the lowest shot possible to get used to how it works and build up to what you decide you want to do.50% is a good basis of what should be harmless but all setups are different.

i personally would get a purge if your racing, i have one and use it more for fun but i do not like the so called purging into the motor. many claim it's harmless but i've seen a few intakes blow up from it.

from another personal point i would try to use a fogger system or direct port as they tend to work alot better then plates but if it isn't an option the plate systems do work.

as far as ignition it all depends on the power your making. naturally if your over 400 rwhp the stock ignition probably won't work to your best points so i would look to upgrade. a msd digital 6 is great for nitrous setups and a timing ret. box inside the car is a nice convenience as well. not sure if the dig 6 box does this automatically when armed but it might.

n20 is alot of fun but it isn't nearly as cheap as everyone thinks it is. good luck with it.

 

I live in massachusettes so it gets pretty cold here and I bet for some odd reason the car will see some winter weekends, well until the roads get salted anyways. I have a blanket already, found it under the seat when I baught the car. I figure it can't hurt, I just wanted to know the pro's and cons of one. I want a purge kit really bad for two reasons; one is they are flat out cool and can intimidate some people, and two they are good for the system. NX sells a kit with a purge, bottle heater and some other stuff for around 400. I know by the end of this I am probably going to spend as much as a roots type SC but thats ok because I am expecting it. I want it done right, not just hacked in there with the stuff I need to barely get by. As far as the block all I really know is it was out of a early 70's truck. I heard the PO saying something about an el camino but i am not to sure. He said the block should be around a 74 and it has 4 bolt mains. It has some really nice and beefy aftermarket main caps but I am not to sure who makes them and what they are, but by eye I can tell they are not stock.

 

well a blanket is all nice and well but the heater itself is what you really want. purge is nice for the track especially when running a big shot but true racers will not be intimidated by it and most never use it on the street.

besides raising a few eyebrows or lifting skirts depending on where you place the line they are better suited for the track. i can't say much though because when i was younger i went through a bottle or two being stupid.

 

yep, knowing me I will probably be a fool and waste a good amount of nitrous for no reason. I will eventually grow out of it and smarten up and realize that is money I am throwing in the air but at first I know I will be purge happy.

What do you guys think of mounting the bittle behind the drivers seat? My cage kinda has a cradle around the driver seat so no one can get in the back drivers side anyways.

 

You don't have to set anything up. It can be done on any system that is actuated by a momentary (hand controlled) switch. Throttle switches aren't a good idea for doing this.

The only time you have to worry about an intake backfire doing this is if your car is either really cold, or tuned like crap. I've launched my car before on JUST nitrous and rolled onto the throttle about a half-second later. (BAD traction on a particular street). If tuned properly, your motor will not know the difference. Fuel and air is just fuel and air, regardless of where it comes from.

Don

 

i wouldn't recommend it....even says so in their own instructions. however, if it works for you then that's great.