[Healeys] 100 piston rings- Moss

[Alan Seigrist]

I put 40 over / 5 ring pistons on my BJ8 - 100K miles later the car burns
no oil & hone is as good as the day it was machined.... so I do prefer that
it doesn't eat any oil.  I am not averse to putting all 5 on if you can.

Best,

Alan

On Sat, Apr 30, 2022 at 1:11 AM Henry G Leach via Healeys <
healeys at autox.team.net> wrote:

> The way I understand it, is today its all about friction. Many of the
> modern day pistons are three ring only. In the old days we needed all the
> squeeze we could get to keep oil out of the combustion. With todays
> machining capabilities, tolerances are so close that its not as much an
> issue as in the past. If you want less drag on your engine you can leave
> out the oil control set, but you may get some blow by on these old iron
> clunkers.
>
> I tend to follow the proper parts assembly, so that if there are five
> slots I fill them with 5 rings. My NOS replacement .020 Mahle pistons had 4
> and a matched set of Grant rings fit perfect. No blowby and good
> compression. Hank
>
>
>
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