Spark plug gap?

A

ARTTII

New Member

Jan 13, 2004

272

2

0

Detroit, MI

May 23, 2006

#1

• May 23, 2006

• #1

I'm converting an early 302 (with 351w cam) to fox style EFI. What should I gap my spark plugs at? I was using 0.038 with an MSD ready-to-run distributor while the engine was carbed, I believe I will have to open the gaps up now? If so what is the stock spec of say an 87-93 Mustang?

Thanks!

 

sunil6784

Member

Mar 31, 2005

620

0

18

Boston, MA

May 23, 2006

#2

• May 23, 2006

• #2

I believe stock is .054, but most of us run about .050 to compensate for time...

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

May 23, 2006

#3

• May 23, 2006

• #3

Sunil is right - 0.052-0.056" is the aero fox gap (for most of them atleast - I've seen guys post different specs for later foxes).

I also run 'em tight - at about 0.045". No need to do it - it's a personal decision.

 

I

Insane3D

New Member

Jul 21, 2004

310

0

0

May 24, 2006

#4

• May 24, 2006

• #4

I recently set mine up with a .060 gap, and the car seems to like it. The idle is a bit smoother and throttle response seems a bit snappier....although that might just be the new plugs themselves...