Plug Gap

[Mike Coffey]

Hey Jim, What is a good plug gap for my F-2 blower motor? .025 to .030?
COFFEY

[Jim Monson]

Not a blower motor but I run mine at .025".

[Mike Coffey]

Thanks Jim M. :-D

[Scott McMullen]

With Good ignition I would Say .54 But thats On if your Running HEI :p

[Mike Coffey]

With Good ignition I would Say .54 But thats On if your Running HEI :pOver a half inch plug gap?:eek: Your a pretty funny guy Scott.:p

[Scott McMullen]

;) :smt082

[Tims86]

I would think .25-.30 depending on your boost. I would think closer to the .25

[Pooch565]

I run .20 with no problems so far.

[morris]

I still run .035 with 7 box or more on gas.

[Ron Clevenger]

There's a lot of misunderstanding about spark plug gap. You should always run as much gap as your ignition system will allow. The things that will regulate the gap is cylinder pressure and the overall ability of the ignition system.
For example, if you only run .020 gap, but the system is capable of delivering enough energy (millijoules) to jump a .035 gap, the ignition will discharge at what ever it took to jump that .020 gap. When you start widening the gap, the ignition will be pushed to delivery enough energy to jump that wider gap. The things to watch for to know if you have exceeded the ignitions capability are, misfiring, tracking marks in the dist cap or spark plug wires failing.

It's always a good idea to run as much as you can get away with. Personally at 32 PSI and a Digital 7 with 16v battery I run about .028. If you run a MSD 10 Plus you could probably run even more at that boost.

Just for comparisons, a Digital 7 delivers 190 millijoules at the plug, MSD 10 Plus is rated at 700 millijoules and a MSD ProMag 44 is rated at 950 millijoules.

Blessings..........Ron Clevenger.

[Mike Coffey]

I have been running .025 gap like Jim said and that has been working out great so far.

[Scott McMullen]

I was Just Stating old Stock HEI From the Late 70's Gap as a Joke I run .35 N/A

[mikes]

Hi mike. Do you have a web site? Id like to see more of your car/combo. Thanks!!

[junior]

scott you mean .035 ;) i run .030 f2 40lbs of boost msd 7531

[Prochargedstang]

ttt

[BJCRAZYZ]

ttt
you should check with nathan aka "silverstang" he has a real similar setup , i am sure he has a wealth of info for a combo like yours
jason