View Full Version : hi pressure fuel jet change


adrynalinjunkie
07-02-2011, 11:42 PM
Well I sprayed the zex ls1 fogger at the track with the 175 jets in and I was pig rich @ 10.2 to 10.02 afrrrr all the way down the track.

Zex has a 28 in my fuel @ 58 psi. I am running c16 in the stand alone. Should I put a 21 fuel jet in inplace of the 28 or is that too big of a jump? I am trying to go from 10.2 afr to something low to mid 12s on the wideband.

4bangermustang
07-03-2011, 11:34 AM
Did you try reading a plug? we are having the same prob and think it might just be a faulty WB reading or running out of pump(no Standalone). It starts off good in each gear and works its way to pig rich. Going to try reading the plugs next time out.

camscam02
07-03-2011, 12:55 PM
What nitrous jet?

adrynalinjunkie
07-03-2011, 03:36 PM
No I didn't spend 2 hours pulling plugs at the track. My wb matched the dyno wb perfect. The wb was matching what the ecu. Was commanding on the motor pass so I don't doubt the wb.

adrynalinjunkie
07-03-2011, 03:42 PM
Zex calls for a 105 nitrous jet with the 28 fuel in the. 2 banks but remember this is hi pressure and there are nozzle jets also.

4bangermustang
07-03-2011, 03:52 PM
Your WB won't work correctly:

http://www.innovatemotorsports.com/forums/showthread.php?t=4899

I don't know the ZEX kits but a .105 orifice seems like too big of a pill for the nitrous side


per this website:

http://www.zex.com/zx/zx-jet-charts


You should have a .043 in the fuel and a .083 in the nitrous side.

camscam02
07-03-2011, 08:08 PM
Zex calls for a 105 nitrous jet with the 28 fuel in the. 2 banks but remember this is hi pressure and there are nozzle jets also.

I have no idea what you are doing, but lets start all over. Please post the exact kit you have. A link preferably