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TSI can make any length you want.
From: DAVID MASSEY=20
Sent: Wednesday, April 7, 2021 5:39 PM
To: cliff_hansen@outlook.com ; triumphs@autox.team.net=20
Subject: Re: [TR] Advice on high compression head
I went the band-aid route on my TR3 for the same reason. But the right =
way is to get a machinist to shorten the pushrods. BPNW sells short =
rods for the TR6/SC engine but at that time they didn't have any for the =
wet-sleeve engine.
Dave=20
-----Original Message-----
From: Cliff Hansen <cliff_hansen@outlook.com>
To: list Triumph <triumphs@autox.team.net>
Sent: Wed, Apr 7, 2021 4:23 pm
Subject: [TR] Advice on high compression head
The telenovela =E2=80=9CWhat=E2=80=99s going on with this 4A cylinder =
head=E2=80=9D has developed a new plot twist.
The head, after cleanup, measures 3.21=E2=80=9D from bottom to the =
surface for the valve cover gasket. Stock is 3.330 (if I got the number =
correctly). Some PO cut 0.11 off, because only 0.010=E2=80=9D was =
removed in this round of clean up. Now I can see an explanation for the =
persistent pinging I=E2=80=99ve dealt with over the last few years (head =
has been milled so compression is high, material near intake valves has =
been thinned, increasing likelihood of hot spots =E2=80=93 I=E2=80=99m =
getting this from Kastner=E2=80=99s preparation book), which I had =
thought was due to leaking intakes, carb shafts, or operating at higher =
altitude.
As is, I can=E2=80=99t use this head because there is not enough slack =
in the valve train to give 0.010=E2=80=9D clearance on several valves. I =
didn=E2=80=99t notice before, but now that I am looking, all the valve =
adjusters were nearly backed out all the way.
Looking for advice from the list: is there any reasonable way to use =
this head?
- I=E2=80=99d prefer to reduce compression but don=E2=80=99t see any =
reasonable way to accomplish that. I called GasketWorks and he gently =
discouraged me from getting a custom thick head gasket, saying instead =
I=E2=80=99d be better off finding a head which had not been milled so =
much.=20
- Shimming the rocker pedestals to get valve clearance feels like a =
bandaid which certainly won=E2=80=99t address the pinging (assuming that =
the pinging is a result of the shortened head).
Would appreciate any advice on the way forward.
Cliff
Sent from Mail for Windows 10
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs =
http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com
-------------------------------------------------------------------------=
-------
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs =
http://autox.team.net/mailman/options/triumphs/jerryvv@roadrunner.com
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<BODY dir=3Dltr>
<DIV dir=3Dltr>
<DIV style=3D"FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">
<DIV>TSI can make any length you want.</DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'>
<DIV style=3D"FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style=3D"BACKGROUND: #f5f5f5">
<DIV style=3D"font-color: black"><B>From:</B> <A =
title=3Ddave1massey@cs.com>DAVID=20
MASSEY</A> </DIV>
<DIV><B>Sent:</B> Wednesday, April 7, 2021 5:39 PM</DIV>
<DIV><B>To:</B> <A =
title=3Dcliff_hansen@outlook.com>cliff_hansen@outlook.com</A> ;=20
<A title=3Dtriumphs@autox.team.net>triumphs@autox.team.net</A> </DIV>
<DIV><B>Subject:</B> Re: [TR] Advice on high compression =
head</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV=20
style=3D'FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: =
"Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; =
DISPLAY: inline'>
<DIV style=3D"COLOR: black; FONT: 12pt arial, helvetica, sans-serif">
<DIV><FONT size=3D3>I went the band-aid route on my TR3 for the same =
reason. =20
But the right way is to get a machinist to shorten the pushrods. =
BPNW=20
sells short rods for the TR6/SC engine but at that time they didn't have =
any for=20
the wet-sleeve engine.</FONT><BR></DIV>
<DIV> </DIV>
<DIV style=3D"CLEAR: both"><FONT size=3D4>Dave </FONT><BR><BR></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial,helvetica; COLOR: =
black"><FONT=20
size=3D2>-----Original Message-----<BR>From: Cliff Hansen=20
<cliff_hansen@outlook.com><BR>To: list Triumph=20
<triumphs@autox.team.net><BR>Sent: Wed, Apr 7, 2021 4:23 =
pm<BR>Subject:=20
[TR] Advice on high compression head<BR><BR>
<DIV id=3Dyiv4309632913>
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<DIV>
<DIV class=3Dyiv4309632913WordSection1>
<DIV class=3Dyiv4309632913MsoNormal>The telenovela =
=E2=80=9CWhat=E2=80=99s going on with this 4A=20
cylinder head=E2=80=9D has developed a new plot twist.</DIV>
<DIV class=3Dyiv4309632913MsoNormal> </DIV>
<DIV class=3Dyiv4309632913MsoNormal>The head, after cleanup, measures =
3.21=E2=80=9D from=20
bottom to the surface for the valve cover gasket. Stock is 3.330 (if I =
got the=20
number correctly). Some PO cut 0.11 off, because only 0.010=E2=80=9D was =
removed in this=20
round of clean up. Now I can see an explanation for the persistent =
pinging I=E2=80=99ve=20
dealt with over the last few years (head has been milled so compression =
is high,=20
material near intake valves has been thinned, increasing likelihood of =
hot spots=20
=E2=80=93 I=E2=80=99m getting this from Kastner=E2=80=99s preparation =
book), which I had thought was due=20
to leaking intakes, carb shafts, or operating at higher altitude.</DIV>
<DIV class=3Dyiv4309632913MsoNormal> </DIV>
<DIV class=3Dyiv4309632913MsoNormal>As is, I can=E2=80=99t use this head =
because there is=20
not enough slack in the valve train to give 0.010=E2=80=9D clearance on =
several valves.=20
I didn=E2=80=99t notice before, but now that I am looking, all the valve =
adjusters were=20
nearly backed out all the way.</DIV>
<DIV class=3Dyiv4309632913MsoNormal> </DIV>
<DIV class=3Dyiv4309632913MsoNormal>Looking for advice from the list: is =
there any=20
reasonable way to use this head?</DIV>
<DIV class=3Dyiv4309632913MsoNormal>- I=E2=80=99d prefer to reduce =
compression but don=E2=80=99t=20
see any reasonable way to accomplish that. I called GasketWorks and he =
gently=20
discouraged me from getting a custom thick head gasket, saying instead =
I=E2=80=99d be=20
better off finding a head which had not been milled so much. </DIV>
<DIV class=3Dyiv4309632913MsoNormal>- Shimming the rocker pedestals to =
get valve=20
clearance feels like a bandaid which certainly won=E2=80=99t address the =
pinging=20
(assuming that the pinging is a result of the shortened head).</DIV>
<DIV class=3Dyiv4309632913MsoNormal> </DIV>
<DIV class=3Dyiv4309632913MsoNormal>Would appreciate any advice on the =
way=20
forward.</DIV>
<DIV class=3Dyiv4309632913MsoNormal> </DIV>
<DIV class=3Dyiv4309632913MsoNormal>Cliff</DIV>
<DIV class=3Dyiv4309632913MsoNormal> </DIV>
<DIV class=3Dyiv4309632913MsoNormal>Sent from <A=20
href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550986"=20
rel=3D"nofollow noopener noreferrer" target=3D_blank>Mail</A> for =
Windows 10</DIV>
<DIV class=3Dyiv4309632913MsoNormal> </DIV></DIV></DIV></DIV>** <A=20
ymailto=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</A>=20
**<BR><BR>Donate: <A href=3D"http://www.team.net/donate.html"=20
target=3D_blank>http://www.team.net/donate.html</A><BR>Archive: <A=20
href=3D"http://www.team.net/pipermail/triumphs"=20
target=3D_blank>http://www.team.net/pipermail/triumphs </A><A=20
href=3D"http://www.team.net/archive"=20
target=3D_blank>http://www.team.net/archive</A><BR><BR>Unsubscribe/Manage=
: <A=20
href=3D"http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com=
"=20
target=3D_blank>http://autox.team.net/mailman/options/triumphs/dave1masse=
y@cs.com</A><BR></FONT></DIV></DIV>
<P>
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