I had to mill 0.272" off of a TR6 head that had been put on my GT6
engine by some GDPO. Worked fine - still working fine, in fact. That
took the GT6 motor from 6.2:1 compression to 9.5:1. Much improved!
Scott B.
-----Original Message-----
From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
Behalf Of robert bownes
Sent: Thursday, August 04, 2011 11:48 AM
To: Charly Mitchel
Cc: fot@autox.team.net
Subject: Re: [Fot] Fw: [CWE] 6 cylinder head
And I can personally attest to having taken 0.250" (yes 1/4") off of
one.
I think the next one I do will be a bit less radical. :) and yes, I'm
still
looking for a late head.
Bob
On Thu, Aug 4, 2011 at 12:26 PM, Charly Mitchel
<charly@mitchelplumbing.com>wrote:
> More 6 cylinder head info
> Charly Mitchel
> ----- Original Message ----- From: "Robert M. Lang"
<lang@isis.mit.edu>
> To: "Charly Mitchel" <charly@mitchelplumbing.com>
> Sent: Thursday, June 16, 2011 8:17 AM
>
> Subject: Re: [CWE] 6 cylinder head
>
>
>
>> Hi Charly,
>>
>> I won't comment on cwe right now...
>>
>> Regarding head thickness, Richard Good has a pretty good table on his
web
>> site (www.goodparts.com) that can be used as a guideline, but keep in
>> mind that production of TR6 heads is far from perfect (owing to
multiple
>> foundries and some other details), so the actual volume of the
combustion
>> chambers can vary a few cc's here and there.
>>
>> The late heads (73 and later) for US federal emmision specs were cast
/
>> finished at over 3.550 thickness to get the 7.75:1 compression ratio.
YOu
>> have to mill a crap load of metal off those heads to get resonable
>> compression gain.
>>
>> I hope this helps!
>>
>> rml
>> ------------------------------**------------------------------**
>> ---------------
>> Bob Lang Triumph TR6!! | This space for rent
>> Former NER Solo Chair |
>> Voice:617-253-7438 | Cell: 339-927-4489
>> ------------------------------**------------------------------**
>> ---------------
>>
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