[Fot] "GT40" lifters

[John Styduhar]

​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.


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On Wed, Nov 15, 2017 at 4:56 AM, van.mulders.marcel--- via Fot <
fot at autox.team.net> wrote:

>
> 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)
> 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.
> Marcel
>
> ----- Oorspronkelijk bericht -----
> Van: "fot" <fot at autox.team.net>
> Aan: "Chuck Arnold and/or Kathleen Kelley" <triosan at gmail.com>, "fot" <
> fot at autox.team.net>
> Verzonden: Woensdag 15 november 2017 02:59:02
> Onderwerp: Re: [Fot] "GT40" lifters
>
> They are commonly used in the TR-2/3/4 block in
> place of stock lifters by using a sleeve - in
> this case they are smaller than stock.  If you
> use the cam developed by Larry Young you can't
> use those lifters as he needs the full diameter
> of the stock lifter.  The Elgin cams work OK with them though.
>
> I'd not heard of using them in a TR-6 until now though.
>
> Regards, Tony
>
> At 01:02 PM 11/14/2017, Chuck Arnold and/or Kathleen Kelley via Fot wrote:
> >Somewhere in a Triumph post I read about using
> >what I think were referred to as GT40 liofters
> >[tappets].  They are slightly larger in
> >diameter than stock TR6 ones.  A set came with
> >my car, but have never been used.  Does anyone
> >know of there and the modification [or where I
> >might have read about them?].  Also, they are for sale.
> >
> >Thanks,
> >
> >Chuck
> >_______________________________________________
> >fot at autox.team.net
> >
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>
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> marcel at telenet.be
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