Spark plug gap??

Running a 302, decent cam, headers, 600cfm carb...any recommendations on a spark plug gap. I am using autolites.

 

Unless you have upgraded the ignition system I would think you should stick with stock ... .036?

 

Dang...forgot the most important part. MSD 6al ignition and blaster coil.

 

for my mallory points its .024 and i dont konw what it is on my mustang

 

I personally run .45 with Crane Box and MSD dizzy

 

I run .040 with factory Duraspark-II (converted from points). I could run .045 but there's no need to...

 

some say run it as wide as you can until it starts to misfire. I personally don't think it makes much difference, as long as it's got more than .020" and less than .100" it usually works fine. That is, unless it's boosted or bottle-fed, then you normally have to close 'em up to about .025" or thereabouts to keep the spark from blowing out.

 

I meant to say .045 I guess I would need one hell of a ignition system for .45

 

i'm running an msd 6al, blaster II coil nand i set them at .045

 

yeah, the MSD can handle that just fine, in fact you could go a lot wider if you wanted to with the MSD...

 

Thanks guys. It looks like the general consensus is .045. Will do. What would I do without you???

JP

 

Also, don't forget to "index" your plugs.....helps fuel economy and probably about 3-5 horsepwower.

 

Index? Never even thought of it before. I just checked it out on-line. I will have to do that.

 

I think I heard this - once. :confused:


http://www.fordmuscle.com/archives/2000/07/indexplugs/index.shtml

 

Another reason for me, is running dome pistons without alot of clearance, it keeps the plug away from the piston so that the plug does not get hit by the piston......been there,,,,,,done that!

But it is a very neat subject that alot of people over look.
I first learned in a magazine a few years back did a "cheap speed" article and I learned a few little tricks like that.