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- - Spark Plugs for BB (https://67-72chevytrucks.com/vboard/showthread.php?t=80548)

72superBB

12-10-2003 09:52 PM

Spark Plugs for BB

What kind and what gap does everyone use fortheir big block motor if they haveone?

I am running a .35 gap now and wonder if that is correct. I have an HEI, Holly 750 carb, edlebrock performer intake.

thanks

Ron

Cat Fuzz

12-10-2003 09:56 PM

HEI gap is .045 :metal:

1tonswb

12-11-2003 12:59 AM

I run .35 gap on mine with a mallory unilite, blasters 3 coil, and a msd 6al box.

cableguy0

12-11-2003 01:03 AM

72super open your gap up to .045 you will probably get a lil better gas mileage and some more power.
1tonswb open your gap to .050-.055 and that truck will liven up a bit. with an msd box you can actually run up to about .065 plug gap

72superBB

12-11-2003 01:10 AM

thanks for the info. As soon as it is not as cold as a witch's tata, I will get that taken care of!

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