[Fot] Spitfire 1300 Piston Rings

[Enquiries Road & Track]

if JE are making pistons, surely they will supply rings???

In general, ring & piston design has improved a lot in recent decades

in most cases, you will head for a nitrided steel top ring, a steel centre
ring (possibly filled with something) and a 3-piece segmented oil ring

in many cases, they can now make a perfectly satisfactory top and second
ring at or under 1mm in thickness. Generally, the thinner it is, the lower
the friction but really thin rings require super careful honing and bed-in

best practise is to not have any slots behind the oil ring, but rather a
ring of small holes

some piston makers have all sorts of clever micro 'tricks" like
anti-flutter grooves they machine in the lands between the rings

Whomever supplies the rings will specify the final hone finish required

best practise is to use double "spiro-locks" to retain the gudgeon pin

Terry
Australia


On Fri, Mar 19, 2021 at 9:26 AM Brad Eells via Fot <fot at autox.team.net>
wrote:

> Hello Amici,
>
> A discussion with my machine shop man led to some thoughts about piston
> ring selection.
>
> He recommended getting in touch with Total Seal. I of course took a look
> at their website to discover a mind boggling selection of ring types.
>
> Can any of you share your ring choices?
>
> I will be having JE Pistons make a custom set of forged pistons for me.
>
> I am in need of ring thickness dimensions as well. Should this come from
> the factory (GT6) pistons I currently have in the car?
>
> Your thoughts are appreciated!
> *Brad Eells*
> *Chino CA*
> *#72 FP 1969 Triumph Spitfire Mk3*
> *#35 DP 1962 Triumph TR4*
> *1965 Triumph TR4A IRS...for the road!*
>
>
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