03-19-2007, 07:53 AM
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CC Member
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Join Date: Mar 2004
Location: miami,
FL
Cobra Make, Engine: E-M Cobra Ford FE 427 w/ Webers 48 IDA
Posts: 1,383
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Not Ranked
Need Help with tuning Webers
Hello All,
I have been trying to figure out these webers for awhile now. Of course the more you play with them, the more you will understand them.
My questions is, I installed a fresh set plugs NGK # 7 in my 427 SO engine and ran the motor for about 3-5 minutes at idle and plulled the plugs and found that they were black carbon. Here are my specs:
Main Jet - 160
Air Corrector - 210
Emulsion tube - F-7
Chokes - 37
Bypass - 55
Idle Jet - 55 F10
Idle Jet holder - 120
Pump Jet - 45
Aux Venturi - 45
I also noticed that my mix screws are about 2 to 2 1/2 turns out. Whats funny is I am using an LM-1 to tune the carbs and I set it lean to about 17.1 -18.1 and it still runs rich.
I read the articles on the web from inglese and it states that it should be 3/4 turn on the mix screw. I am suspecting that I need to change the value on my my Idle Jet and Idle jet holder.
Any suggestions  |
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