Saw this over on tech and figured some that dont venture over there would like to know

NX Ls1 jetting list from NX website RWHP RATED....GM Stg.1 EFI system, part number 20920

Single jet
50HP 35N 18F
75HP 41N 22F
100HP 52N 28F
125HP 57N 33F (fuel side may be a bit rich)
150HP 62N 33F

NOS jetting 5177 kit DRY FLYWHEEL RATED 900-1000psi rated
Dual jets
75HP 28N
85HP 30N
100HP 32N

NOS jetting 5168 kit wet for LS1 RWHP RATED 900-1000psi rated
single jet plate system
75HP 41N 28F
100HP 51N 31F
125HP 55N 35F
150HP 63N 38F

TNT wet kit for power ring RWHP RATED 900psi bottle 60psi fuel -6an feed
dual jets
100HP 35N 22F
150HP 42N 25F
200HP 51N 28F
250HP 55N 31F
300HP 63N 35F
350HP 67N 39F

This is another NOS chart from the COLONEL
HP-- Single N2O--Dual N2O--Single Fuel
25 .024
30 .026
35 .028 .020
50 .037 .024 .020
75 .042 .028 .022
100 .047 .032 .025
125 .055 .038 .029
150 .063 .044 .034
175 .070 .052 .038
200 .082 .047 .044
250 .093 .055 .050

DynoTune Dry Kit HP numbers based on 950 PSI

Single Dry Jetting DynoTune Kit
50 BHP=.032
75 BHP=.042
100 BHP=.048

Dual Dry Shot Jetting
50 RWHP=.026
75 RWHP=.032
100 RWHP=.036



here is a rough quick conversion for single to dual and dual to single jets
as per Robert56

" here's the math for turning single size jets into dual jets (it's not half size) single jet x .71 = dual jet size.
Example of your first single jet,
.062 x .71 = dual .043's, which is 147.5crank hp, or 125.375rwhp, as per NOS's way.

Also, the Colonels table is NOS fwhp at 950psi and the 100 crank is actually dual .033 and nos used to send a .032 and a .034, that's what I got on my first 5177 and the math backs it up.

Here is the math for converting dual jets into single jets:
(.71 x size of one jet) x 2 = single jet size"



originally posted by spanktu

Fuel Jet Size Calculator
http://www.ny-trex.com/calculator.php


Post up if you have anything to add.

 

sounds like sticky material to me.

 

Just a fyi and if anyone cares lol - the NX list up top works for the 5.7 hemi too

 

For the NX kit 57N and 33F is a 125 shot.

 

cleaned up and ready for you guys to use

slow, since yours is the first post, you'll be responsible for updating the data in it. so let it be written.

 

The Fuel pill matches what is listed for a 150 shot one of them has to be off, dont want someone toasting their motor. Seems maybe the 125 shot may be a bit rich on the fuel side. Anyway you can verify this, with a wideband or on teh dyno?

 

And so it was read

Thanks Grippy

 

i use a 62N and 33f jet for a 150 shot which only adds 100 rwhp..on our dyno the only time ive seen a kit actually add what they advertise are ZEX kits on a 03 cobra..actually added 125 rwhp with a 100 shot

edit; 62 and 33 for a 150 shot target of 11.8 afr

 

Yeah, thats what NX told me on the phone, the 125 shot is just a bit richer. We tried a few different fuel pills on the dyno and their recommended setup made the most power, but a 32 fuel jet would have worked better than the 33. with the 33 it was 11.8 and with the 31 it was like 12.2 or 12.3. We didn't have a 32 though so its a tad rich but not too bad.

 

IRC on my ny-trex kit 125 was 57N 31F but I ran a 32 to be safe since it was an old high mileage motor still ran damn good