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<DIV>TSI can make any length you want.</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=dave1massey@cs.com>DAVID
MASSEY</A> </DIV>
<DIV><B>Sent:</B> Wednesday, April 7, 2021 5:39 PM</DIV>
<DIV><B>To:</B> <A title=cliff_hansen@outlook.com>cliff_hansen@outlook.com</A> ;
<A title=triumphs@autox.team.net>triumphs@autox.team.net</A> </DIV>
<DIV><B>Subject:</B> Re: [TR] Advice on high compression head</DIV></DIV></DIV>
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<DIV><FONT size=3>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.</FONT><BR></DIV>
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<DIV style="CLEAR: both"><FONT size=4>Dave </FONT><BR><BR></DIV>
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<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: arial,helvetica; COLOR: black"><FONT
size=2>-----Original Message-----<BR>From: Cliff Hansen
<cliff_hansen@outlook.com><BR>To: list Triumph
<triumphs@autox.team.net><BR>Sent: Wed, Apr 7, 2021 4:23 pm<BR>Subject:
[TR] Advice on high compression head<BR><BR>
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<DIV class=yiv4309632913MsoNormal>The telenovela “What’s going on with this 4A
cylinder head” has developed a new plot twist.</DIV>
<DIV class=yiv4309632913MsoNormal> </DIV>
<DIV class=yiv4309632913MsoNormal>The head, after cleanup, measures 3.21” 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” was removed in this
round of clean up. Now I can see an explanation for the persistent pinging I’ve
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
– I’m getting this from Kastner’s preparation book), which I had thought was due
to leaking intakes, carb shafts, or operating at higher altitude.</DIV>
<DIV class=yiv4309632913MsoNormal> </DIV>
<DIV class=yiv4309632913MsoNormal>As is, I can’t use this head because there is
not enough slack in the valve train to give 0.010” clearance on several valves.
I didn’t notice before, but now that I am looking, all the valve adjusters were
nearly backed out all the way.</DIV>
<DIV class=yiv4309632913MsoNormal> </DIV>
<DIV class=yiv4309632913MsoNormal>Looking for advice from the list: is there any
reasonable way to use this head?</DIV>
<DIV class=yiv4309632913MsoNormal>- I’d prefer to reduce compression but don’t
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’d be
better off finding a head which had not been milled so much. </DIV>
<DIV class=yiv4309632913MsoNormal>- Shimming the rocker pedestals to get valve
clearance feels like a bandaid which certainly won’t address the pinging
(assuming that the pinging is a result of the shortened head).</DIV>
<DIV class=yiv4309632913MsoNormal> </DIV>
<DIV class=yiv4309632913MsoNormal>Would appreciate any advice on the way
forward.</DIV>
<DIV class=yiv4309632913MsoNormal> </DIV>
<DIV class=yiv4309632913MsoNormal>Cliff</DIV>
<DIV class=yiv4309632913MsoNormal> </DIV>
<DIV class=yiv4309632913MsoNormal>Sent from <A
href="https://go.microsoft.com/fwlink/?LinkId=550986"
rel="nofollow noopener noreferrer" target=_blank>Mail</A> for Windows 10</DIV>
<DIV class=yiv4309632913MsoNormal> </DIV></DIV></DIV></DIV>** <A
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