Problems with TNT F1/150 tuning
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From: Port Tobacco, MD
Problems with TNT F1/150 tuning I have been having problems getting the car to run rich with the 150 shot. Here's my setup.
Built bottom end
TEA heads 12.25:1 CR
232/238 111lsa cam
Racetronix pump
KB BAP 40%
Returnstyle line
plugs gapped ~.036
race fuel
The fuel wants to jump around from 12.5:1 to 15.5:1. Should I reduce timing? Should I tighten up the plug gap? Should I turn up the BAP?
Phillip
Built bottom end
TEA heads 12.25:1 CR
232/238 111lsa cam
Racetronix pump
KB BAP 40%
Returnstyle line
plugs gapped ~.036
race fuel
The fuel wants to jump around from 12.5:1 to 15.5:1. Should I reduce timing? Should I tighten up the plug gap? Should I turn up the BAP?
Phillip
Are you talking your Air Fuel (A/F) is jumping from 12.5 to 15.5?
If so you are NOT running rich, you are running lean.
If it would drop from 12.5 to say 11.5 than it would be rich.
Rule of tumb is drop 2 degrees for each 50 hp shot -- so you should be droping your timing from 4-6 degrees.
A-tap it at the same time, watch your O2's. They should NOT be below .900 at WOT.
David
If so you are NOT running rich, you are running lean.
If it would drop from 12.5 to say 11.5 than it would be rich.
Rule of tumb is drop 2 degrees for each 50 hp shot -- so you should be droping your timing from 4-6 degrees.
A-tap it at the same time, watch your O2's. They should NOT be below .900 at WOT.
David
Are you running the stock pump with the BAP on it? I had trouble doing that on my brother's car running over a 100 shot. I changed out the stock pump for a walbro 340 and all is well now on the 150 shot.. I even went down on the fuel jet size a little after changing the pump, took care of all his problems.
