I just bought a used Compucar nitrous system from a friend. He bought it used at Carlisle and never used it. It has 7 jets. 26, 33, 37, 43, 46, 63, and 59 . 26 and 37 are installed in the nozzle now. How do the numbers work? I know the higher the # the bigger the hole, but how do you match them up? I'm totally new to this. Any help would be appreciated. Thanx, Chris.

 

If you go here, and fill out the form, it will tell you how to match the jets up to get the power level you're looking for: http://www.robietherobot.com/NitrousJetCalculator.htm

 

I tried it, but the numbers don't match up. I'm guessing the numbers on the jets are thousandths of an inch ?

 

Correct.. So if you enter .037 for the nitrous jet, you should see that a .020 fuel jet is called for, and should result in a ~50HP shot.

Upping the nitrous jet to .047 and the fuel jet to .026, you should see about 100 HP.

 

I don't have a 47.

 

Well, with the .046 you should be really close to 100 HP. You'll just be a tiny bit richer than with the .047.