[Fot] Head question on TR-6

[Jack Mc]

How do you know that head will give you a compression ratio that high ?
Have you cc'ed the head?

I don't think a stock GT6 head will increase the compression ratio of stock TR6 engine THAT much. What am I missing ?

Cheers,
Jack Mc

Sent from my iPad

> On Oct 18, 2015, at 9:32 AM, Spitfire Racing <Spitfire_Racing at twcny.rr.com> wrote:
> 
> For the past 20 years or so I have had a NOS Circle B 6 cylinder head on a shelf in the parts room. For some reason I assumed it was for a TR-6 and would be ideal as a starting point for an eventual TR-250 project. Must to my disappointment I find it is a Mk2 GT-6 head. Likely it would afford too high a CR sitting on a 2500cc engine in stock condition.
> The question is……… Is it unreasonable to think I can open up the combustion chamber to bring the CR down to ~ 10.5:1 using it on a 2500cc application ?
> Any of you have the combustion chamber volume to achieve this using flat top pistons ??
>  
> Anyone out there have done this before? No point in trying to reinvent the wheel.  Serial number on head is 517528.
> Snow on the ground this AM and temps in the 20s has me already in the winter project mode!
>  
> Thanks,
>  
> Russ Moore
> Spitfire #49
>  
>  
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