I'm trying to acquire one of these kits.....I'm planning on using the 100 hp jetting (94 a4 with 78k miles), with a jacobs pro street ignition system (no retard or controller) and new wires. I don't think this system comes with an aux. fuel pump or anything.....obviously if it comes that way, they don't feel you need one....but do I? Please divulge any info you've got on this kit to me.
thanks!
I've been running this system for a few months now on my '94 Vette.
It is a dry kit, meaning that you spray it about 6 inches before the MAF sensor and let it add the fuel. The way a MAF sensor works is you have a couple of really thin exposed wires stretched accross the sensor. These wires are heated. As the incoming air into the engine blows past these wires, they are cooled down. Depending on how much, and at what rate the wires are cooled tells the ECM how much air is coming into the motor. It then compares this airflow rate to the fuel map table in the ECM and adds in the required fuel. So when the nitrous comes through the MAF sensor,...it doesn't exactly "see" oxygen. Just airflow. And since nitrous is extremely cold, it cools the MAF off a good bit and fairly fast which makes the ECM radically jump up the fuel going to the motor when this happens. It comes in a black gym bag. The solenoid is mounted up near the bottle in the bag, so it's real easy to hide on a car. All you have running up to the engine bay is a peice of black plastic line. When you're ready, you pull the power cord out,...plug it into the cigarette lighter, turn the bottle on,..and you're ready. They say you don't need a gauge or bottle warmer with the Bag Kit, but if you want any kind of consistancy you do. The bottle pressure can fluctuate a lot, and depending on the pressure can mandate exactly how hard of a "hit" the nitrous makes. They recommend running the kit about 950psi,...but I've had my best results about 1100. You don't want to go past 1200psi though because at or around 1225-1250 the solenoid will stick closed and won't open until the pressure goes down. The bottle has a pressure relief valve that will blow about 3000psi,...and the bottle itself is good up to about 5000psi, but it's best not to leave it out in the car in the sun during the day. I have a friend who wired a Bag Kit up to a WOT switch,...so it can be done....but as long as you can drive halfway decent, it's not needed. Depending on the track, your tires, and current power,..the car may not hook if you hit it in 1st gear,...so you may have to wait until you roll out and shift to 2nd before you hit the button. Just make sure to let off the button if for any reason you let off the gas or go to less than WOT. The Kit comes with 5 jets. A "Small" 0.39 (recomended for 4-cyl), "Medium" 0.46 (for V-6), "Large" 0.63 (for V-8 or V-6), "X-tra Large" 0.76 (for V-8 only), and a "Kick-butt" 0.86 (V-8 only). I'm using the 0.76 jet and when I dynoed the car, it worked out to about a 125-135hp shot. My times are in my sig. The kit is about $396, for the guage and a bottle warmer, count on spending about another $100. It takes about 20min to put the kit on the car. Longer if you feel like hiding it. I spent about an hour putting it on and had 3 friends look at the car for over a half hour and they couldn't find the kit.
The only mods my car has are K&N filter, MSD 6A ignition box, NGK plugs gapped @ .035, Taylor wires, and a B&B TriFlow exhaust.
I live about 5-10min away from Compucar, so let me know if you need any more info.
anyone have a list of things included in this kit? I just got mine today and I want to make sure "DADDY D" didn't screw me over any more than he allready has.
You can usually buy them directly from Compucar cheaper than any of the vendors will have them also. http://www.compucarnitrous.com
As for what is included in the kit.....
Should be as follows:
Bag
10lb bottle mounted to a piece of board.
short steel braided line (4-6in.) mounted to the bottle
solenoid mounted to the braided line
power cord to plug into the cigarette lighter coming from the soleniod and should have a push botton switch on a spiral cord made into it.l
small pack of jets (should be 5 of them.)
about 10ft of black plastic vacuum line
about 6in long peice of brake line with fittings to attach to the plastic line.
hey hi-psi....I've been having some trouble installing a supposdely universal Zex pressure gauge on my kit...check out my other post in this forum...I could use any help.
Corvette Store
Compucar "Nitrous in a Bag"
