In a message dated 98-09-18 15:48:15 EDT, you write:
<< Maybe detonation is caused by the head design. I don't know how the
chambers are finished. Maybe there are some rough spots that become hot
spots causing it.
I would definitely use a (one step) colder plug.
Do a full throttle run and shut down right after you lift and check the
plugs for signs of detonation.
Going to have to do something before the '99 Ford Lightning RC comes out
(roots blown 5.4 SOHC) >>
One thing Frank didn't mention was his pulley size (Frank?) ... I'm not sure
about his truck, but I don't get anywhere near 4lbs in the 2000-3000rpm range
he mentioned. I think I might get 3psi at 3000rpm, but my truck really doesnt
start moving until 3000+ anyway. That would be from the combination of my
exhaust, and cam killing the low end torque my truck once had.
I have done a full throttle run through 1st, 2nd, and half of 3rd at my
appropriate test and tune area (infront of my shop, hehe.) and the plug didn't
show any appreciable signs of detonation. I checked it with a loop. Showed a
darker tannish color with a light shade of orange (damn 104+....)
ttyl
Patrick
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