Today is my birthday, so I thought I'd take a ride in the Bay Area
mountains. I went about 25 miles to get to the mountain roads to take me
towards home. After a quarter mile into climbing the first hill, the car
shut down. I think I need to adjust my carburetors!! Just kidding, it was
an ignition issue, most likely the coil. My local LBC mechanic sourced one
locally and will be able to put it in tomorrow. I'm not sure why a coil
would go out. It was a two year old Petronix Flamethrower unit. While
waiting for the flatbed tow truck, I switched out the dist cap, rotor, no
change. I then pulled the Petronix out and put in my spare set of points,
still nothing. Testing later showed power going into the coil, but none
coming out during starting. I guess we'll know with a new coil.
Unfortunately, there was not a spare around to test our hypothesis.
I'll also be working with my LBC mechanic on the Mallory Unilite dizzy.
Drilling the shaft for the drive dog is beyond my scope of tools, and
getting help with timing always seems to be helpful. I'll surely show my
ignorance when I ask the list for help with the timing settings. I
understand stock settings of 4 ATDC at idle. I don't understand the
"static" setting of 10 BTDC. I understand that the timing should advance
as higher rpms are reached, but I don't what the proper advance should be.
Should all these guidelines be thrown out with my set up described below?
What should I be looking for with the new dizzy installed?
So, here is the info on my setup: Compression ratio between 9.5 and 10:1.
GP2 cam with 1.65 roller rockers. Rimflow valves, 6-3-1 pulse header,
triple weber carbs, vales gapped at .015 and .017, spark plugs gapped at
.035, Sport coil, new Mallory Unilite dizzy with 24 degrees mechanical
advance. I prefer top end power, but a balance is good too.
Andy Packard
CD6746L-T(O) (Toyota Overdrive)
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