Spark plug gap?
Thread Starter
Melting Slicks
Joined: Dec 2001
Posts: 2,025
Likes: 1
From: Billings MT
Spark plug gap?
I just bought some ACdelco rapidfires for my current setup, and i'm not sure what to gap them too. These are not pregapped.
Here is what i have:
'69 041 closed chamber heads
9.8:1 compression
Flatop piston with .025 deck
Thanks
Here is what i have:
'69 041 closed chamber heads
9.8:1 compression
Flatop piston with .025 deck
Thanks
Team Owner
Joined: Jul 2001
Posts: 182,997
Likes: 88
From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
Re: Spark plug gap? (VETDRMS)
I'm not sure but I think it's .35 with regular ignition, .40 with HEI and .45+ with HEI + MSD box. However - I could be wrong about that...
:cheers:
Olivier
:cheers:
Olivier
Drifting
Joined: Jan 2002
Posts: 1,645
Likes: 11
From: Schaumburg IL
Re: Spark plug gap? (GrandSportC3)
Delco recommends to use a .035 gap on the Rapid Fire. I run them with a Crane HI-6, same CD as MSD and use a .045 gap due to the hotter spark and they work fine on a BB.
