Spark Plug gap
 

I've looked this up on this forum and others but can't find a good answer.

My truck is a 81 c10, with a 350, aluminum heads, holley carb - what should I gap my plugs at? I bought new ones, and they're set at .03

BUT - Recently when I've been accelerating at highway speeds, it sort of "gurgles" on acceleration, popping almost.

The only thing I changed was plugs, any suggestions???

Re: Spark Plug gap
 

Is this correct?? http://wiki.answers.com/Q/What_is_pl...evy_350_engine

.035 for points, and .045 with HEI distributor? How do I know which I have? Check out my engine...

http://i241.photobucket.com/albums/f...r/DSC04817.jpg

Re: Spark Plug gap
 

if its a stock distributor it should be HEI most HEI have the coil in the top of the cap

Re: Spark Plug gap
 

You're right, it is HEI Just looked, so go with .045?

Re: Spark Plug gap
 

.45 yeapppers dude..

Re: Spark Plug gap
 

p.s. where did you get those valve covers?
and the air filter dish?
that looks good man

Re: Spark Plug gap
 

I run 0.045 on my ZZ4.
Specs: FR5LS Gap .035
Rapid Fire #5 Gap .045

Re: Spark Plug gap
 

One of the spark plug 'ports' (dont know official name) is cracking spark plugs when I tighten it, anyone know anything about this?

Re: Spark Plug gap
 

I gap mine at .050 with a HyperTech Supercoil and it improved the idle and overall performance of the engine ;)

Re: Spark Plug gap
 

Sounds like your over tightening.

Hand tighten and then just snug them up.

They don't need to be that tight.

Re: Spark Plug gap
 

if you check your shop manual or the specific brand of plug's site they will have the torque specifications for each individual string of plugs..

Re: Spark Plug gap
 

Wait. So if I have a coil on top of my distributor I def have HEI? I just ordered mad 8.5 wires NOT for HEI. Do I need to order HEI wires?
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Re: Spark Plug gap
 

yes, coil on top is HEI. Will require plug wires for HEI, will have female boots on each end (90* at the dist terminals, and the specified straight or 90* at the plug). Standard points type plug wires will have male ends on the dist terminals.

Re: Spark Plug gap
 

Oh, add a bigger air filter!! At mid to high RPMs you need more air!! Stock was 4" for gas engines. Your engine will run cooler too!