Subject: Re: [Fot] Head Thickness

From: marty via Fot <[email-masked]>
Date: Mon, 6 Apr 2015 08:10:23 -0400

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Hi Dave. I think Kas covered that in the GT6 competition manual. Don't have=
 mine handy so I'm afraid I'm not much help.  Kind of going through the sam=
e exercise on my spitfire. Current thickness in 2.990 and I need to mill .0=
50 off to hit 12:1.  I'm concerned about breaking into water jackets if I d=
o that though.

=20

Good luck.

=20

Marty
=20

Date: Mon=2C 6 Apr 2015 07:27:42 -0400
To: [email-masked]
Subject: [Fot] Head Thickness
From: [email-masked]

Wondering if anyone can tell me the max I can shave off my GT6 head. Actual=
ly looking for the minimum height of the head after milling.  Right now the=
 head stands at 3.283".  With a 2.95 bore=2C 2.99 stroke=2C .033 squished h=
ead gasket and 34.5 cc valve pockets.  The compression=2C as I figure it=2C=
 is 9.76:1.  I'm looking for 12:1.
The head is stamped V3119 and 308361.   It's off of a 1970 GT6+ that we're =
building strictly for racing.  Looks like we can still remove at least .040=
.
Any help will be greatly appreciated.

Dave
_______________________________________________ [email-masked] http://w=
ww.fot-racing.com Donate: http://www.team.net/donate.html Archive: http://w=
ww.team.net/archive Forums: http://www.team.net/forums Unsubscribe/Manage: =
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<body class=3D'hmmessage'><div dir=3D'ltr'>Hi Dave. I think Kas covered tha=
t in the GT6 competition manual. Don't have mine handy so I'm afraid I'm no=
t much help.&nbsp=3B Kind of going through the same exercise on my spitfire=
. Current thickness in 2.990 and I need to mill .050 off to hit 12:1.&nbsp=
=3B I'm concerned about breaking into water jackets if I do that though.<BR=
&nbsp=3B<BR>
Good luck.<BR>
&nbsp=3B<BR>
Marty<BR>&nbsp=3B<BR>
<DIV>
<HR id=3DstopSpelling>
Date: Mon=2C 6 Apr 2015 07:27:42 -0400<BR>To: [email-masked]<BR>Subject=
: [Fot] Head Thickness<BR>From: [email-masked]<BR><BR>
<DIV align=3Dleft><FONT color=3D#000000 size=3D2 face=3DVerdana>Wondering i=
f anyone can tell me the max I can shave off my GT6 head. Actually looking =
for the minimum height of the head after milling.&nbsp=3B Right now the hea=
d stands at 3.283".&nbsp=3B With a 2.95 bore=2C 2.99 stroke=2C .033 squishe=
d head gasket and 34.5 cc valve pockets.&nbsp=3B The compression=2C as I fi=
gure it=2C is 9.76:1.&nbsp=3B I'm looking for 12:1.</FONT></DIV>
<DIV align=3Dleft><FONT color=3D#000000 size=3D2 face=3DVerdana>The head is=
 stamped V3119 and 308361.&nbsp=3B&nbsp=3B It's off of a 1970 GT6+ that we'=
re building strictly for racing.&nbsp=3B Looks like we can still remove at =
least .040.</FONT></DIV>
<DIV align=3Dleft><FONT color=3D#000000 size=3D2 face=3DVerdana>Any help wi=
ll be greatly appreciated.</FONT></DIV><FONT color=3D#000000 size=3D2 face=
=3DVerdana><BR></FONT>
<DIV align=3Dleft><FONT color=3D#000000 size=3D2 face=3DVerdana>Dave</FONT>=
</DIV><BR>_______________________________________________ [email-masked]=
t http://www.fot-racing.com Donate: http://www.team.net/donate.html Archive=
: http://www.team.net/archive Forums: http://www.team.net/forums Unsubscrib=
e/Manage: http://autox.team.net/mailman/options/fot/[email-masked]</DI=
V> 		 	   		  </div></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: SCOTT JANZEN via Fot <[email-masked]>
Date: Mon, 06 Apr 2015 08:14:24 -0400

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I will measure two of mine when I get home . There's no single answer as eve=
ry casting is different. I've got one at 12:1 compression with no thin spots=
 and another at 11.5:1 where you can clearly see a thin spot where the metal=
 is deforming near a cooling passage. The machinist did several light passes=
, looking for this.
There was an email just over a week ago with photos of a head marked with th=
e thin spots. Look for that for guidance and find a good machinist that will=
 take a little off at a time, looking for trouble.

Sent from my mobile device=20

> On Apr 6, 2015, at 7:27 AM, damys--- via Fot <[email-masked]> wrote:
>=20
> Wondering if anyone can tell me the max I can shave off my GT6 head. Actua=
lly looking for the minimum height of the head after milling.  Right now the=
 head stands at 3.283".  With a 2.95 bore, 2.99 stroke, .033 squished head g=
asket and 34.5 cc valve pockets.  The compression, as I figure it, is 9.76:1=
.  I'm looking for 12:1.
> The head is stamped V3119 and 308361.   It's off of a 1970 GT6+ that we're=
> Donate: http://www.team.net/donate.html
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/[email-masked]=
om

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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>I will measure two of mine when I get h=
ome . There's no single answer as every casting is different. I've got one a=
t 12:1 compression with no thin spots and another at 11.5:1 where you can cl=
early see a thin spot where the metal is deforming near a cooling passage. T=
he machinist did several light passes, looking for this.</div><div>There was=
 an email just over a week ago with photos of a head marked with the thin sp=
ots. Look for that for guidance and find a good machinist that will take a l=
ittle off at a time, looking for trouble.<br><br>Sent from my mobile device&=
nbsp;</div><div><br>On Apr 6, 2015, at 7:27 AM, damys--- via Fot &lt;<a href=
=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:<br><br></di=
v><blockquote type=3D"cite"><div><div align=3D"LEFT"><font face=3D"Verdana" s=
ize=3D"2" color=3D"#000000" letterspacing=3D"0" kerning=3D"0">Wondering if a=
nyone can tell me the max I can shave off my GT6 head. Actually looking for t=
he minimum height of the head after milling.&nbsp; Right now the head stands=
 at 3.283".&nbsp; With a 2.95 bore, 2.99 stroke, .033 squished head gasket a=
nd 34.5 cc valve pockets.&nbsp; The compression, as I figure it, is 9.76:1.&=
nbsp; I'm looking for 12:1.</font></div><div align=3D"LEFT"><font face=3D"Ve=
rdana" size=3D"2" color=3D"#000000" letterspacing=3D"0" kerning=3D"0">The he=
ad is stamped V3119 and 308361.&nbsp;&nbsp; It's off of a 1970 GT6+ that we'=
re building strictly for racing.&nbsp; Looks like we can still remove at lea=
st .040.</font></div><div align=3D"LEFT"><font face=3D"Verdana" size=3D"2" c=
olor=3D"#000000" letterspacing=3D"0" kerning=3D"0">Any help will be greatly a=
ppreciated.</font></div><font face=3D"Verdana" size=3D"2" color=3D"#000000" l=
etterspacing=3D"0" kerning=3D"0"><br></font><div align=3D"LEFT"><font face=3D=
"Verdana" size=3D"2" color=3D"#000000" letterspacing=3D"0" kerning=3D"0">Dav=
e</font></div></div></blockquote><blockquote type=3D"cite"><div><span>______=
_________________________________________</span><br><span><a href=3D"mailto:=
[email-masked]">[email-masked]</a></span><br><span></span><br><span>=
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></body></html>=

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