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Old 03-13-2022, 03:07 PM
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25stevem 25stevem is offline
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I would check your cranking compression.
It sounds like your cam is in retarded.

I have run a Isky 270 mega cam in a bone stock 77 400 with only 8 to 1 compression and not had to idle the motor that high.

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Old 03-13-2022, 06:45 PM
TA-71 TA-71 is offline
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Quote:
Originally Posted by 25stevem View Post
I would check your cranking compression.
It sounds like your cam is in retarded.

I have run a Isky 270 mega cam in a bone stock 77 400 with only 8 to 1 compression and not had to idle the motor that high.
I checked with the previous owner and the cam was installed straight up.

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Old 03-14-2022, 04:35 AM
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Do you have full battery voltage/current to the ignition coil for the Pertronix?
What carb-#?
Is the idle/lowspeed circuit in carb adjusted/modified for the cam/today fuels?
Are the S.C.S. and C.S.C. systems intact and functional?

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