what sparkplugs do you run?

[Blown 88 Gt]

I would like to get some plug numbers & gaps you run.I was originally told to use autolite 3910s cant find them at any of the part stores then i was told to run ngk 7371 s cant find those either. Pep boys would have to special order 7-10 days all replies appreciated

[midnight]

Autolite 3923's 24's or 25's...23's being the coldest..gap at .035..They work fine..

[Trey]

Yep i use to run Auotlite 24's in my 91 gaped at .035. worked great for me.

[Redsnk95]

For your TFS heads, AutoLite 3923s are the way to go. I run the 3923s in my AFRs with a gap of .038-.042" depending on conditions.

Troy

[blownaway]

What about "p" heads?

[xator]

What about NGK's FR5 ?? for TFS TW's

[MoDo]

autolite ar3923

.035

[ray95]

i've always run ngk's gapped at .035

[HotPony]

GT40 heads use an AWSF22C Motorcraft plug, I'm using the AWSF32C right now gapped at .035 and I have no issues with detonation, but it's been very cool lately, low 60's, so possibly I will see some detonation come summer time... I do have a little tip in detonation while racing but I just up the Boost Retard a little and that goes away (at 1 degree, starting at 2lbs of boost)

[BK Meyers]

If you have an Advance Auto Parts or a Discount Auto parts near you give them a call. I know Advance carries or can get the Autolite AR's and the NGK 5671A's, and the prices are very good.

Advance and Discount are owned by the same company so hopefully their warehousing is the same.

BK Meyers

[blown89stang]

I run autolite's, can't remember the number but they are 2 degrees colder than stock and I have AFR-185 heads. They are gapped at 35.

[Blown 88 Gt]

would running the 3823s @ 38 cause missing above 4000 under boost ive read on corral some are running plugs gapped as low as 28

[Blown 88 Gt]

would running the 3923s @ 38 cause missing above 4000 under boost ive read on corral some are running plugs gapped as low as 28