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I would agree with Tony. Given that you never know if the casting of your =
head is thin at some location it is better to start on the conservative sid=
e. Better to leave a little power for next time than ruin a head you have =
lots of work in. I say this because there is far more power in the valves =
and porting than a .010 cut off the head for more compression. Ken
Sent from Mail for Windows
From: Tony Drews via Fot
Sent: Saturday, April 6, 2024 1:50 PM
To: GREGORY THOMPSON; FOT Triumph
Subject: Re: [Fot] TR4 head milling
Working with my dad (uncle jack) we considered 0.130 to 0.150 "normal" to m=
ill, 0.190 to be where it started to get dangerous.=C2=A0 That said, there =
is some variability from head to head on where the internal water passages =
are.
Regards, Tony
On 4/5/2024 6:27 AM, GREGORY THOMPSON via Fot wrote:
Has anyone had an issue with breaking into a water jacket on the TR4A head =
with taking off .150?=20
Thank you,
Greg Thompson=C2=A0
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
s.com
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72" style=3D=
'word-wrap:break-word'><div class=3DWordSection1><p class=3DMsoNormal>I wou=
ld agree with Tony.=C2=A0 Given that you never know if the casting of your =
head is thin at some location it is better to start on the conservative sid=
e. =C2=A0Better to leave a little power for next time than ruin a head you =
have lots of work in.=C2=A0 I say this because there is far more power in t=
he valves and porting than a .010 cut off the head for more compression.=C2=
=A0 Ken</p><p class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>S=
ent from <a href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550986";>Mail<=
/a> for Windows</p><p class=3DMsoNormal><o:p> </o:p></p><div style=3D'=
mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padd=
ing:3.0pt 0in 0in 0in'><p class=3DMsoNormal style=3D'border:none;padding:0i=
n'><b>From: </b><a href=3D"mailto:fot@autox.team.net";>Tony Drews via Fot</a=
><br><b>Sent: </b>Saturday, April 6, 2024 1:50 PM<br><b>To: </b><a href=3D"=
mailto:thompsong@prodigy.net";>GREGORY THOMPSON</a>; <a href=3D"mailto:fot@a=
utox.team.net">FOT Triumph</a><br><b>Subject: </b>Re: [Fot] TR4 head millin=
g</p></div><p class=3DMsoNormal><o:p> </o:p></p><p>Working with my dad=
(uncle jack) we considered 0.130 to 0.150 "normal" to mill, 0.19=
0 to be where it started to get dangerous. That said, there is some v=
ariability from head to head on where the internal water passages are.</p><=
p>Regards, Tony</p><div><p class=3DMsoNormal>On 4/5/2024 6:27 AM, GREGORY T=
HOMPSON via Fot wrote:<o:p></o:p></p></div><blockquote style=3D'margin-top:=
5.0pt;margin-bottom:5.0pt'><p class=3DMsoNormal>Has anyone had an issue wit=
h breaking into a water jacket on the TR4A head with taking off .150? <o:p>=
</o:p></p><div><p class=3DMsoNormal><o:p> </o:p></p></div><div><div><d=
iv><div><p class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"H=
elvetica",sans-serif'>Thank you,<o:p></o:p></span></p></div><div><p class=
=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Helvetica",sans-s=
erif'><o:p> </o:p></span></p></div><div><p class=3DMsoNormal><span sty=
le=3D'font-size:12.0pt;font-family:"Helvetica",sans-serif'>Greg Thompson&nb=
sp;<o:p></o:p></span></p></div></div></div></div><p class=3DMsoNormal><br><=
br><o:p></o:p></p><pre>_______________________________________________</pre=
><pre><a href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a></pre><pr=
e><o:p> </o:p></pre><pre><a href=3D"http://www.fot-racing.com";>http://=
www.fot-racing.com</a></pre><pre><o:p> </o:p></pre><pre>Donate: <a hre=
f=3D"http://www.team.net/donate.html";>http://www.team.net/donate.html</a></=
pre><pre>Archive: <a href=3D"http://autox.team.net/archive";>http://autox.te=
am.net/archive</a> <a href=3D"http://www.team.net/pipermail/fot";>http://www=
.team.net/pipermail/fot</a></pre><pre>Unsubscribe/Manage: <a href=3D"http:/=
/autox.team.net/mailman/options/fot/tony@tonydrews.com">http://autox.team.n=
et/mailman/options/fot/tony@tonydrews.com</a></pre><pre><o:p> </o:p></=
pre></blockquote><pre style=3D'mso-margin-top-alt:0in;margin-right:.5in;mar=
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<o:p> </o:p></span></p></div></body></html>=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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