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Re: 83mm/86mm Heads

To: triumphs <triumphs@autox.team.net>
Subject: Re: 83mm/86mm Heads
From: Steven Newell <steven@newellboys.com>
Date: Sat, 03 Sep 2005 08:37:10 -0600
TeriAnn Wakeman wrote:

>> I visited Steve Newell, the Newell boys and the Newell TR4's this 
>> summer.  We looked at the head off of Steve's early TR4.  It looked 
>> like a TR3 head from the top (no flat area above the #1 intake port), 
>> but from the bottom it looked like a TR4 head (with the cast in 
>> chamfers).  I've not read of a head made like this.  It must of been 
>> cast during the change of design.  Any one else seen heads like 
>> this?  I'm just a curious kinda guy.  Kent Shrack TR3a
>
> Steve has an interesting cylinder head.  When I first put my head 
> diagram together I was allowed to spend a day browsing through a wall 
> of TR2 through 4A heads at a British car wrecking yard that was big on 
> Triumphs.  I went through well over 40 cylinder heads, each marked 
> with the model they came off of, measuring each one and marking them 
> down in my notebook. In my research I did not come across a head like 
> Steve's. His head seems to be the last TR3A (83mm standard 
> fittment)casting that had been machined for 86mm pistons.  This head 
> is a question that will probably never be answered.  Was the factory 
> just using up castings on hand during the transition?  Was this an 
> official configuration for a short time at the beginning of TR4/3B 
> production? 

I'll take a few photos for you, TeriAnn, as my strange head is resting 
on the workbench today.

Steven




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