Quote:
Originally Posted by lippy
One lingering problem I had was that my plugs were fouling with fuel. It was a tough nut to crack but I finally did. Turns out that with such a big cam, you need to run almost full advance at idle. I purchased a 10 degree MSD bushing from 4secondsflat.com, set my full advance at 36, and my initial at 26, and it solved the problem. At that point I wasn't using the wideband anymore to chase this problem. I left the wideband on just for WOT and tuning about 3k RPM, and I think I got it pretty close. Plugs look good now, even when I cut them apart, and I took the wideband off.
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Lippy,
I just picked up theis thread after doing some researching to solve similar problems to yours. I have just installed a new 468 shelby stroker with dual quads and a fairly large cam/overlap. Runs fine under load, but surges like hell below 2,500rpm, part throttle cruise and runs-on after ignition off. I am considering to get a wideband to help me tune the carb, but your point about increasing the initial timing is interesting. I'm at around 15degrees initial and 36 Total.
Did you solve the run-on problem by increasing the initial advance or something else?
Thanks
Stuart