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JSeery · 06-19-2020, 07:16 PM

See if any of this is helpful.

Mfirth: What about NGK B6HS-7534 plugs? 1/2" reach compared to say an Autolite 216 with 7/16" reach, which Offy recomends.

Tubman: Everything I remember tells me that 1/2" reach plugs are the correct fit for Offenhauser heads. Champion "L" series plugs are 1/2" reach. I have a bunch of Champion "L" series plugs and a set of never been altered/never been installed Offenhauser 8BA heads at my shop. I will go up tomorrow with my camera and screw some 1/2" reach plugs into these heads and take some pictures and get to the bottom of this.

Mfirth: Thanks Denny [tubman]. Will be anxious to see those pics. I read on the H A M B, i think about guys using NGK B6HS- 7354 1/2 ' reach in Offys & like'n them. Mike

The Offenhauser references are not correct, but they are references to 1/2 reach spark plugs.

06-19-2020, 07:16 PM	#12
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: spark plug reach See if any of this is helpful. Mfirth: What about NGK B6HS-7534 plugs? 1/2" reach compared to say an Autolite 216 with 7/16" reach, which Offy recomends. Tubman: Everything I remember tells me that 1/2" reach plugs are the correct fit for Offenhauser heads. Champion "L" series plugs are 1/2" reach. I have a bunch of Champion "L" series plugs and a set of never been altered/never been installed Offenhauser 8BA heads at my shop. I will go up tomorrow with my camera and screw some 1/2" reach plugs into these heads and take some pictures and get to the bottom of this. Mfirth: Thanks Denny [tubman]. Will be anxious to see those pics. I read on the H A M B, i think about guys using NGK B6HS- 7354 1/2 ' reach in Offys & like'n them. Mike The Offenhauser references are not correct, but they are references to 1/2 reach spark plugs.