Mixing Jets
Mixing Jets has anyone else had to mix jets with the NX maf kit in order to richen it up some? i had to pop the 150 fuel jet in order not too lean out on my H/C setup. is this normal?
how is your fuel supply? and bottle pressure?
nx normally is very conservative with most of the thier jetting. but with a modified car, you may need to do some tuning your self.
Ryan
nx normally is very conservative with most of the thier jetting. but with a modified car, you may need to do some tuning your self.
Ryan
10 Second Club
Joined: Jun 2002
Posts: 1,884
Likes: 4
From: H-town
hard to say. if you have a stock fuel pump, you might be maxxing it out with your setup. i think 500rwhp or so is all they can take and with a H/C motor and spray, it is very easy to get more then that. have you changed your fuel filter lately? maybe it is that simple.
FWIW I always independantly verify my A/F with a wideband to pick the fuel jet, regardless of what the vendor recommends.. They provide a jet map to match a basically stock vehicle, and they can't really predict all the variables.
i have a walbro 340 in it. it has a lean spike of 14:1 at 4500 rpm then levels out to 12.8:1 all the way to 6500 rpm. is that normal. i really doubt i am running out of fuel since i am at 4200 feet above sea level.
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