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Old October 14th, 2018, 04:23 PM
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Cayoterun Cayoterun is offline
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Join Date: Jan 2013
Location: Guymon, Ok.
Truck: GMC V12 powered '46 Chevy pu
Age: 84
Posts: 167
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Default Re: Gmc V12 in trucks

Quote:
Originally Posted by BillT View Post
On my '62 6500 with the 478 V-6, once in a while when driving a hi-way speed of about 55 to 60 for a length of time and then coasting some slowing down for the exit ramp, it would let out a back fire equal to an M-80.

The first time it happened it sure scared the heck out of me.
Thanks, BillT for a good belly-laugh to start the day. Did the floor boards shake, and you looked in the rear mirror to see how much pig iron was scattered on the pavement??

Since on wells, the motors ran a constant speed, we'd tune them at night and use the exhaust as a guide. With the stub pipes on each head, blue flame would be at the pipe tips, so we could tune each distributor on each side of the motor, by tuning in each distributor to max blue flame.
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Cayoterun
Okla Panhandle

I think I'll fix it myself, and pay the extra $500.
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