Quote:
Originally posted by 88fivepointoh
What is going to cause a boost large enough on a " stock " motor to accomidate for the already lean from the factory fuel mixture? on a stock motor without a adjustable fuel pressure regulator, with a 125 dry shot, you'll lean that motor out and damage it. Do your reasearch on this. you will need more fuel pressure and fuel to run nitrous.. know fact. 
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As goes for which kit is better...it all depends on the owner and his/her knowledge of "tune-up".
Yes.....when you spray any amount of Nitrious you will need to add an additional amount of fuel to compinsate. NOS makes a dry-kit. It is called a dry kit because it does not bring in any fuel into the plenum area, not because it doesn't bring in any fuel at all. The fuel is introduce by raising the fuel pressure to the injectors while the motor is inhaling the nitrious oxide only. It is normal to see the fuel pressure increase as much as 30-60 pounds additional over stock fuel pressure. This increase in fuel pressure is controlled with a mechanical device with a vacuum tee with jets when you purchase the Dry-Kit from NOS (kit number 5114 I believe.) The wet-kits introduce fuel and Nitrious into the engine at the same point or location of the Nitrious.
The BIG-Shot Plate is a good plate for the EFI cars too. Just a higher level and the lowest safe point is 150. It will go way past 400 H.P level with Plate Modifications.
1989 GT is right on the money.