Lean condition
Lean condition Ok guys, here's my issue. I started off with a 125 shot and worked my way down to a 35 shot. I even ran the fuel jet a little rich with no luck. No matter what I do it goes 12.8 to 12.9 on my wideband. What gives? A 35 shot fuel jet is 16. I ran a 19 and no improvement.
950 bottle pressure.
950 bottle pressure.
Correct. I tried 125, 100, 75, 50, and now I'm at a 35 shot. On every shot size the wideband read the same. I played with jetting but could never get it to get into the 11.5 range.
It's a brand x kit with a nitrous outlet 90mm plate. I even tried hooking it up to a dedicated fuel cell with 58psi and no luck. Ally wiring is legit with the correct amperage wire.
Even when I pull from the rail I should have enough pump. It's a walbro 255 with a hotwire kit.
Even when I pull from the rail I should have enough pump. It's a walbro 255 with a hotwire kit.
What is your normal wot afr's? The afr's didnt change as you went down throught the jets becuase the spreads were staying the same. I'd start with the 50hp nitrous jet and the 100hp fuel jet and see where that gets you with the afr's. Adjust accordingly then, suggested jetting isnt always right on do to many factors. Using wide band and reading plugs is needed on any kit to get jetting where you want it and where you feel it should be. .
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What is your normal wot afr's? The afr's didnt change as you went down throught the jets becuase the spreads were staying the same. I'd start with the 50hp nitrous jet and the 100hp fuel jet and see where that gets you with the afr's. Adjust accordingly then, suggested jetting isnt always right on do to many factors. Using wide band and reading plugs is needed on any kit to get jetting where you want it and where you feel it should be. .
Is it normal for someone to have to add that big of a fuel jet.
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Has anyone else had to run a fatter fuel jet for a given shot.
Normal I cant say for sure. What I assume is and you know what that means is there are just as many that are rich right out of the box as there is lean out of the box for the set up theyre put on. The only difference is you and some others are actually using a wideband and assuming checking plugs. The majority of people just put the jets in and if it isnt popping or blowing black smoke they run it. In my line of work its trust but verify, alway check for your self. There is a chance that something is obstructing the fuel noid, pretty easy to inspect so its worth checking.
Teching In
Joined: May 2012
Posts: 4
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Sometimes you can't really go off of the wide-band all the time when reading Nitrous. Every car takes it differently, I recently jetted a friends car on a 175 shot started safe off the top of my head I think I started .73n / .38f on pump 93 wide band was around 11.0 ended up going back to a .36 or .35 the car takes it well around 11.7-12.0 on wide band. But its more important to take a look at the plugs then trust the wide band in my book.
Cheers ~
Cheers ~
Sometimes you can't really go off of the wide-band all the time when reading Nitrous. Every car takes it differently, I recently jetted a friends car on a 175 shot started safe off the top of my head I think I started .73n / .38f on pump 93 wide band was around 11.0 ended up going back to a .36 or .35 the car takes it well around 11.7-12.0 on wide band. But its more important to take a look at the plugs then trust the wide band in my book.
Cheers ~
Cheers ~
