carb and ignition question

[BOE]

I have a 64 c10 with a 292 and rochester b carb and hei that i can't identify as to manufacturer. had the carb rebuilt and valves adjusted by a reputable shop close by. ran great for a few days and even better with fresh plugs until today.when i accelerate there is a hesitation before it reacts. i have the plugs gapped at .037 because i have read you can increase gap slightly for hei.
my next question is about running dedicated 12 volt wire to hei. where does the wire run from? i can take truck back to shop as it is under warranty but wondered if i should regap plugs back to .035?

[TJ's Chevy]

Originally Posted by BOE

I have a 64 c10 with a 292 and rochester b carb and hei that i can't identify as to manufacturer. had the carb rebuilt and valves adjusted by a reputable shop close by. ran great for a few days and even better with fresh plugs until today.when i accelerate there is a hesitation before it reacts. i have the plugs gapped at .037 because i have read you can increase gap slightly for hei.
my next question is about running dedicated 12 volt wire to hei. where does the wire run from? i can take truck back to shop as it is under warranty but wondered if i should regap plugs back to .035?

With an HEI I would run the plug gap at .045. It will be perfectly fine. Sounds like you have a vacuum leak somewhere if there is some hesitation. While the engine is cold and running spray some carb cleaner around the intake manifold and carb base. Any change in RPM will tell you where the leak is. Could be the advance springs in the dizzy as well. Try the carb cleaner and go from there. But I would widen the gap on the plugs to .040 or .045. Makes for a bigger spark which is the point of an HEI.

[BOE]

good advice TJ. definite change when i sprayed around base of carb. easy fix.
also tried increasing spark plug gap but it would barely run at all. i don't have a voltmeter but wonder if i can run wire straight from positive side of battery to dizzy to insure I am getting 12 volts.

[Jurassic-1]

You can run a new wire from the ignition . The old one probably is a resister wire. Did you see if your Vac advance is working? I had a carb done and the accelerator pump was defective and it had to come apart again. The guy said he installed a heavy duty one. Why are they all not the heavy duty ones? Makes no sense.

[TJ's Chevy]

Originally Posted by BOE

good advice TJ. definite change when i sprayed around base of carb. easy fix.
also tried increasing spark plug gap but it would barely run at all. i don't have a voltmeter but wonder if i can run wire straight from positive side of battery to dizzy to insure I am getting 12 volts.

When I converted to an HEI I wired it from the ignition side of the starter solenoid directly to the coil....the side of the solenoid where the yellow wire comes off. Seemed to work fine.

[BOE]

thanks T.J.

[1963c-10]

Easiest route to get the power to the HEI

[BOE]

thanks for the picture 63. I'll get er done along with other wiring I need done and then let the guy who rebuilt carb check that out. He said old accelerator pump was shot out real bad.

[1963c-10]

Originally Posted by BOE

thanks for the picture 63. I'll get er done along with other wiring I need done and then let the guy who rebuilt carb check that out. He said old accelerator pump was shot out real bad.

No problem. I just did the same conversion as I went from points to HEI. Was a simple conversion, but the diagrams help a bunch.