Subject: Re: [Fot] Head question on TR-6

From: Jack Mc <[email-masked]>
Date: Sun, 18 Oct 2015 23:12:08 -0400

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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 T=
R6 engine THAT much. What am I missing ?

Cheers,
Jack Mc

Sent from my iPad

> On Oct 18, 2015, at 9:32 AM, Spitfire Racing <[email-masked]=
> wrote:
>=20
> 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 wo=
uld be ideal as a starting point for an eventual TR-250 project. Must to my d=
isappointment 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=E2=80=A6=E2=80=A6=E2=80=A6 Is it unreasonable to think I c=
an open up the combustion chamber to bring the CR down to ~ 10.5:1 using it o=
n a 2500cc application ?
> Any of you have the combustion chamber volume to achieve this using flat t=
op pistons ??
> =20
> 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 wint=
er project mode!
> =20
> Thanks,
> =20
> Russ Moore
> Spitfire #49
> =20
> =20
> _______________________________________________
> [email-masked]
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
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> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/limeyv8@aol.=
com
>=20
>=20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>How do you know that head will give yo=
u a compression ratio that high ?</div><div>Have you cc'ed the head?</div><d=
iv><br></div><div>I don't think a stock GT6 head will increase the compressi=
on ratio of stock TR6 engine THAT much. What am I missing ?</div><div><br></=
div><div>Cheers,</div><div>Jack Mc<br><br>Sent from my iPad</div><div><br>On=
 Oct 18, 2015, at 9:32 AM, Spitfire Racing &lt;<a href=3D"mailto:Spitfire_Ra=
[email-masked]">[email-masked]</a>&gt; wrote:<br><br></div>=
<blockquote type=3D"cite"><div><meta http-equiv=3D"Content-Type" content=3D"=
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<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--><div class=3D"WordSection1"><p class=3D"Ms=
oNormal"><span style=3D"font-size:14.0pt">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 r=
eason 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 s=
tock condition. <o:p></o:p></span></p><p class=3D"MsoNormal"><span style=3D"=
font-size:14.0pt">The question is=E2=80=A6=E2=80=A6=E2=80=A6 Is it unreasona=
ble to think I can open up the combustion chamber to bring the CR down to ~ 1=
0.5:1 using it on a 2500cc application ?<o:p></o:p></span></p><p class=3D"Ms=
oNormal"><span style=3D"font-size:14.0pt">Any of you have the combustion cha=
mber volume to achieve this using flat top pistons ??<o:p></o:p></span></p><=
p class=3D"MsoNormal"><span style=3D"font-size:14.0pt"><o:p>&nbsp;</o:p></sp=
an></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt">Anyone out th=
ere have done this before? No point in trying to reinvent the wheel. &nbsp;S=
erial number on head is 517528.<o:p></o:p></span></p><p class=3D"MsoNormal">=
<span style=3D"font-size:14.0pt">Snow on the ground this AM and temps in the=
 20s has me already in the winter project mode!<o:p></o:p></span></p><p clas=
s=3D"MsoNormal"><span style=3D"font-size:14.0pt"><o:p>&nbsp;</o:p></span></p=
><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt">Thanks,<o:p></o:p><=
/span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt"><o:p>&nbsp=
;</o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-size:14.0pt">Ru=
ss Moore<o:p></o:p></span></p><p class=3D"MsoNormal"><span style=3D"font-siz=
e:14.0pt">Spitfire #49<o:p></o:p></span></p><p class=3D"MsoNormal"><span sty=
le=3D"font-size:14.0pt"><o:p>&nbsp;</o:p></span></p><p class=3D"MsoNormal"><=
span style=3D"font-size:14.0pt"><o:p>&nbsp;</o:p></span></p></div></div></bl=
ockquote><blockquote type=3D"cite"><div><span>______________________________=
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autox.team.net</a></span><br><span></span><br><span><a href=3D"http://www.fo=
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r><span></span><br><span></span><br></div></blockquote></body></html>=

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_______________________________________________
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http://www.fot-racing.com

Archive: http://www.team.net/archive

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From: Bud Rolofson <[email-masked]>
Date: Mon, 19 Oct 2015 08:55:43 -0600

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Russ,=20
I have a TR6 circle B head (not NOS) sitting on the shelf if you decide to g=
o another way.
Bud

Sent from my Commodore 64

> On Oct 18, 2015, at 7:32 AM, Spitfire Racing <[email-masked]=
> wrote:
>=20
op pistons ??
er project mode!
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/levilevi@com=
cast.net

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utf-8"></head><body dir=3D"auto"><div>Russ,&nbsp;</div><div>I have a TR6 cir=
cle B head (not NOS) sitting on the shelf if you decide to go another way.</=
div><div>Bud<br><br>Sent from my Commodore 64</div><div><br>On Oct 18, 2015,=
 at 7:32 AM, Spitfire Racing &lt;<a href=3D"mailto:[email-masked].=
com">[email-masked]</a>&gt; wrote:<br><br></div><blockquote ty=
pe=3D"cite"><div><meta http-equiv=3D"Content-Type" content=3D"text/html; cha=
rset=3Dus-ascii"><meta name=3D"Generator" content=3D"Microsoft Word 12 (filt=
ered medium)"><style><!--
ate.html</a></span><br><span>Archive: <a href=3D"http://www.team.net/archive=
">http://www.team.net/archive</a></span><br><span>Forums: <a href=3D"http://=
www.team.net/forums">http://www.team.net/forums</a></span><br><span>Unsubscr=
ibe/Manage: <a href=3D"http://autox.team.net/mailman/options/fot/levilevi@co=
mcast.net">http://autox.team.net/mailman/options/fot/[email-masked]</a=
></span><br><span></span><br><span></span><br></div></blockquote></body></ht=
ml>=

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