[Fot] pop up pistons for the TR2-4 engine ? RE: TR3 Race pistons and liners

[Don Marshall]

On Tue, Nov 9, 2021, 12:26 PM Henry Frye via Fot <fot at autox.team.net> wrote:

> A heck of a lot of races have been won by wet-liner TR's running pop-up
> pistons. And I'll bet none of them ever had a head collapse.
>
> Just sayin'...
>
> On 2021-11-09 11:44, Alexandre Camoletti via Fot wrote:
> > Gents,
> >
> > I recall, but I may be mistaken, that Kas wrote in one of his books
> > that he had experimented pop up pistons but because of the specific
> > shape of the TR2-4 combustion chambers the pop up design was
> > detrimental to the propagation of the flame front and actually this
> > was offsetting the compression gain, so he abandoned this route to
> > remain on the traditional milling one (with thin steel headgasket,
> > which can make quite an additional difference).
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