[Fot] "GT40" lifters

[van.mulders.marcel at telenet.be]

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
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