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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 <fot@autox.team.net> 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=
building strictly for racing. Looks like we can still remove at least .040=
.
> Any help will be greatly appreciated.
>=20
> Dave
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/sjanzen@me.c=
om
>=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>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 <<a href=
=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a>> 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. Right now the head stands=
at 3.283". With a 2.95 bore, 2.99 stroke, .033 squished head gasket a=
nd 34.5 cc valve pockets. 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. It's off of a 1970 GT6+ that we'=
re building strictly for racing. 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:=
fot@autox.team.net">fot@autox.team.net</a></span><br><span></span><br><span>=
<a href=3D"http://www.fot-racing.com";>http://www.fot-racing.com</a></span><b=
r><span></span><br><span>Donate: <a href=3D"http://www.team.net/donate.html"=
>http://www.team.net/donate.html</a></span><br><span>Archive: <a href=3D"htt=
p://www.team.net/archive">http://www.team.net/archive</a></span><br><span>Fo=
rums: <a href=3D"http://www.team.net/forums";>http://www.team.net/forums</a><=
/span><br><span>Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailman=
/options/fot/sjanzen@me.com">http://autox.team.net/mailman/options/fot/sjanz=
en@me.com</a></span><br><span></span><br><span></span><br></div></blockquote=
></body></html>=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
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