Hey.
I am going to be ordering nitrous for my GTA in a few days. I need to know what else to get.

I will be running a Compucar wet kit.

I tried to search but I can not find answers to all of my questions.
The car is a 87 350tpi with headers/K&n/exhaust and 80,000 miles on it. I did a compression test and it was extremely even and good across the board.

I need to know what else to get along with the kit.

I know I need a TPS switch (does the same thing as a WOT switch?)

A window switch.

Fuel pressure Safety switch

Bottle heater.

I am going to run around a 100 wet shot. What else should I invest in.

I hear a ignition box to retard the timing. What one should I purchase and is it needed?

Plugs - What ones for a L98?

Anything else I am missing?

 

I think a window switch is a waste of money on a car with an automatic, but that's just me.

 

As long as I flip the switch after 2500rpm I should be ok?

 

What kind of torque converter do you have? Yeah 2500-3000 rpm is usually the rule of thumb, but if you have even a 2000 stall it is going to flash a lot higher with your added torque on the bottle.

 

The torque converter is stock. Is it worth the investment to pick a higher stall up? What is an OK stall for daily driving.. how much do they run? I have a set of nitto 555r drag radials ariving in a week.
The transmission was recently rebuilt and I am going to install a shift kit soon.

I am still curious as to which ignition box I need. Is timing retard required or can I just get the MSD 6AL or should I get the Digital box with timing retard?

 

For a 100 wet shot ignition retard isn't really needed, just insurance against a bad tune. Still better to have it.

For a ignition box I'd give serious consideration to the Mallory 685. It's a digital box with retard, rev limiter, RPM, and RPM window switches built in. Nothing else to buy, not even RPM pills. The real bonus is it's about $10 cheaper then the MSD 6AL by itself without the extra rpm switches. Wire it up right, flip one switch to arm the system the box will do the rest at the programmed rev's and it can be wired to only pull out timing when the nitrous is actually being sprayed.

For plugs use autolite 22, 23 or equiv non-platnuim

 

I was thinking about a mallory box too.
Any idea where I'd be able to get this?
I'd prefer someplace in Canada.
Canadian tire only has the Mallory 6852M which is the same as the MSD 6A. (no timing retard/rev/etc)

 

Summit, jegs or similar. Mallory's part # is 685 www.centuryperformance.com has it for about the same price.

 

hello i am joey a window switch is a need part when sraying nitrous auto or stick and the reason is if you trans where to slip and you hit a riv limter it is going to cut fuel and cause you to go lean and that will kill your engine and you will also need a fuel pressure safty switch as a helper so if you lose fuel pressure it will kill the nitrous so you dont go lean.

 

About 10 years ago I would have said the same thing for an automatic car.

After years of nitrous tech help and installing systems I say this is the most needed Nitrous accessory on the market.

If your tranny is an auto and it were to slip you would hit revlimiter cutting fuel supply.No fuel BOOM.Also this will keep you from spraying under to low of a RPM keeping you from bogging the car and having a nitrous backfire.

The same with a standard but more critical because its to easy to miss a gear.

I say do it right because if you cant afford a 100 dollar part then you probley do not have the money to build a motor.

Dave

 

Get and AIR/FUEL Ratio gauge! At WOT with your bottle on it should be rich, not slightly rich, rich!

Mechanical WOT switch, I built mine from radio shack components.

100 hp is MAX safe on your stock V8, so don't get greedy.

WTF is a window switch, I don't know that lingo

 

RPM activated switch, it turns on and off at given RPMs, so you the nitrous will only go if you are above the turn on RPM (say 2500), then you set the turn off RPM to the max RPM you want the nitrous going at, say 6k. so the system is only working between that RPM 'window'.

 

What kinda boxes are you guys running? I want to be safe as possible.

Kevin

 

MSD digital 6+
Doesn't have a window switch built in though.

 

Which does have one built in?

Kevin