<div dir="ltr"><div class="gmail_default" style="font-size:small">I don't see how you can run wider tappets in the TR6 without a custom cam with wider lobes. From what I have seen, even the stock cam isn't cast or machined to provide full contact across the width of a stock lifters on the lobe. </div><div class="gmail_default" style="font-size:small"><br></div></div><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br>
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</table><a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"></a></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Nov 15, 2017 at 4:56 AM, van.mulders.marcel--- via Fot <span dir="ltr"><<a href="mailto:fot@autox.team.net" target="_blank">fot@autox.team.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
The engine that was in the TR4A that I bought from Bob Kramer has the sleeved tappet bores as pictured in a Kas Kastner book: these tappets have a diameter of 22.17mm.(Standard TR2-4 tappets are 23.76mm, that is 1.6mm wider, so the cams have 0.8mm more room)<br>
A friend's TR6 engine I'm working on (for too long, but it will be ready before New Yearr) has the enlarged bores to accept the wider tappets : the diameter of these tappets is exactly the same, also 22.17mm. So I believe both are the "GT40"/Ford tappets. The advantage is that there is a choice of these quality Ford tappets. When you have the tappet bores enlarged in a TR6 engine, it is important to mention to the machine shop that these bores are almost but not dead vertical.<br>
Marcel<br>
<br>
----- Oorspronkelijk bericht -----<br>
Van: "fot" <<a href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br>
Aan: "Chuck Arnold and/or Kathleen Kelley" <<a href="mailto:triosan@gmail.com">triosan@gmail.com</a>>, "fot" <<a href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br>
Verzonden: Woensdag 15 november 2017 02:59:02<br>
Onderwerp: Re: [Fot] "GT40" lifters<br>
<div><div class="h5"><br>
They are commonly used in the TR-2/3/4 block in<br>
place of stock lifters by using a sleeve - in<br>
this case they are smaller than stock. If you<br>
use the cam developed by Larry Young you can't<br>
use those lifters as he needs the full diameter<br>
of the stock lifter. The Elgin cams work OK with them though.<br>
<br>
I'd not heard of using them in a TR-6 until now though.<br>
<br>
Regards, Tony<br>
<br>
At 01:02 PM 11/14/2017, Chuck Arnold and/or Kathleen Kelley via Fot wrote:<br>
>Somewhere in a Triumph post I read about using<br>
>what I think were referred to as GT40 liofters<br>
>[tappets]. They are slightly larger in<br>
>diameter than stock TR6 ones. A set came with<br>
>my car, but have never been used. Does anyone<br>
>know of there and the modification [or where I<br>
>might have read about them?]. Also, they are for sale.<br>
><br>
>Thanks,<br>
><br>
>Chuck<br>
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