[AT] Compression test on 7/8 inch plugs

[Dean VP]

Autolite 3076 is the plug I'm using right now in the 1935 B.  I would like to find something much hotter. The 3076 in the plug number and the 6 is the way Autolite designates heat range of the plug so it is already on the high side.  But since I'm going to have a 7/8" to 14MM adapter there may be a 14 mm plug that is hotter.  I've not found a reference that compares heat ranges between manufacturers

Dean VP
Apache Junction, AZ

-----Original Message-----
From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of Brian VanDragt
Sent: Wednesday, November 18, 2020 1:53 PM
To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
Subject: Re: [AT] Compression test on 7/8 inch plugs

There were 1/2" pipe thread spark plugs (14 threads per inch), but what Dean has is 7/8"-18 straight machine threads, like an Autolite 3076 plug has.

Brian

> On 11/18/2020 3:46 PM Claude Kyker <claudekyker at gmail.com> wrote:
> 
>  
> Dean, if my memory serves me correctly seven eights inch is the same threads that’s on 1/2 inch pipe I assume your plug threads are tapered; pipe threads would be.  If that be the case you can make your own adapter using a half inch pipe. 
> 
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