Jerry Bushman

I found this on another site and I wanted to be sure. This is for a Nos brand EFI single nozzle. I have emailed Nos and am waiting for a reply.

I have an old style tpi kit with two nozzles on each side of the plate. So for a 140 hp shot would I be jetting the nozzles for 70 on each side?

I was told I need to divide them up like this. I would like to only go 100hp but I can't find the jet sizes anywhere for 50 hp.

NOS EFI Single Fogger Nozzle Wet

HP Level Nitrous Fuel@42+ psi
70 .042 .026
100 .047 .030
125 .055 .039

Jerry Bushman

Anyone.?? I know someone has used this kit.

rhuarc31

check out
http://www.robietherobot.com/palm/jetcalc.htm

it's a nitrous jet size calculator.

83 Crossfire TA

iTrader: (2)

Metering jets are pretty much the same across the board. It doesn't make a difference what parts you're using for the rest of the N2O system, as long as the parts flow more then the jets the jet size determines the power (in other words, find any complete chart at the FP that your using and it should be about right for your setup)

That being said, the N2O jets that you have listed look a little big for the power level, and the fuel jets are huge in comparison to the N2O jets. For example, your 55 N2O should only need about a 30 or 31 on the fuel side and should be good for at least 135hp (OTOH, adding more fuel with the same size N2O jet will just result in the engine running even richer, hurting power, so I suppose that you may end up with something in the 120-125hp range with those jets).

Jerry Bushman

Thanks for the replies. Especially that calculator. That is very handy to have.

Nos replied to me. I guess it Does have to be jetted for half the horsepower level on each side. I'll have to experiment to see what works best. I need a rich/lean indicator so I can step down on the fuel jets as needed for more power.

Hello,
this will be the jets based on two nozzles and 35-40psi of fuel
pressure. 80 100 120 140 160 HP 34/18 37/22 39/24 41/26 43/28 nos/fuel.
This system is the same as a universal wet kit with a extra nozzle.


Thanks

Shane Whitescarver
Holley Technical
Service Representative