Those of you running a blown motor with AFR heads. What plugs are you using?

I HAD been using the NGK TR6's on my LT1 heads but AFR says that I need a gasket. The TR6's do NOT have a gasket.

When I bought the heads they came with some NGK plugs that DO have a gasket.

The model number is "BCPR6E - 11" and are *gasp* "for imports"

Can anyone give me some idea if these plugs are the right ones to use, and if not, which ones.

 

Well, I don't know anything about the plugs you mention, but I use Autolite 3923's with my 190's. They are three ranges colder than the "normal" heat range, a 3926. They seem to work well for me.

 

I am using ngk bpr7es which are one range colder plugs...

 

I have the AFR heads and have been running with the TR6 for 3 years with no problems. ?

cheers

 

same here, im use the TR6's in my car and they work great, have had alot better luck with these over the autolites

 

Do you guys running the TR6's have any kind of gasket with them?

NGK sent me an email saying the ones I have would be fine but to gap them to .350 which I was going to do anyway.

 

nope no gaskets...

 

no. Don't ever remember seeing a gasket for the TR6 with the AFR heads.

--Hugh

 

Well it was AFR that said I should have gaskets and they recomended Autolites, but the heads came with these NGK plugs and it looks like they will work.

*shrug*

Thanks for the response guys.

 

The AFR heads are machined for a gasket seat plug. The area around the threads is machined flat for the gasket to seat. This is common in aftermarket aluminim heads. I use A/C FR3LS, but the Autolite 3924 / 4 / 5's will work.

The stock heads are machined for taper seat plugs. The area around the threads is machined with a taper for the plug to seal against.

Mike