Extremely rich on nitrous and cant get it to lean out...HELP!
Extremely rich on nitrous and cant get it to lean out...HELP! I went to get my car tuned today and it went great on motor. But when we went to spay it on the dyno it was extremely lean, like off the chart. This was with .088N and .080F jetting in a 4150 plate with 7psi fuel coming from my stand alone tank and a -4 nitrous feed line. We then went down to a .073F jet and the A/F was still way to rich (10.3). That was the smallest jet I had on me so we lowered the fuel pressure and it literally did nothing so we just wrapped it up and called it a night. The others with me swore up and down that much nitrous just cant flow through that -4 feed. But the guy I got this kit from was the first one to get into the 8's with a stock cubed LS1 and everything is ran and hooked up exactly the way he had it with the exception of a "horsepower in a box" timing tuner. I've personally watched him run his car many many times with a bigger shot on a -4. But if what they are saying is true I'm thinking maybe its not getting enough nitrous for the fuel jet size causing it to go extremely rich. Tomorrow I am going to lower the nitrous jetting and see what happens. The previous owner of the nitrous kit told me to keep an 8-9 spread between the nitrous and fuel jets at 6.5-7 psi for fuel pressure, but it was just way to rich. If this does not work then what else do you guys think it could be? I'm beating my head against the wall and have no clue what else to try.
Ls1tech & Truck Sponsor
iTrader: (4)
Joined: Jun 2010
Posts: 2,267
Likes: 1
From: Wichita falls Texas
-Garrett
What brand and style of plate is it? Have you tried calling the manafacturer to get some baseline jetting? This will also depend if its a perimeter spray or center bar, etc. Sometimes a rich condition can be caused by a clogged nitrous filter. Have you checked your fittings also? I can give you better tech with a little more information, awaiting your reply!
-Garrett
-Garrett
I've got the same problem. Trying to figure it out this spring when the snow is gone but interested in what you find out. I'm running E-85 but seems like we've got a pretty similar set-up.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
