[AT] Compression test on 7/8 inch plugs

[JOHN MAXWELL]

Dean,
I suspect you are aware that there was an Autolite 3077. I was interested a year or two ago, but most places I looked were out of stock. 
John in Ferndale 

Sent from my iPhone

> On Nov 18, 2020, at 5:09 PM, Dean VP <deanvp at att.net> wrote:
> 
> 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. 
>> 
>> Sent from my iPhone
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