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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@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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<div dir=3D"ltr"><div dir=3D"ltr">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.=C2=A0 I a=
m not averse to putting all 5 on if you can.<div><br></div><div>Best,</div>=
<div><br></div><div>Alan</div></div><br><div class=3D"gmail_quote"><div dir=
=3D"ltr" class=3D"gmail_attr">On Sat, Apr 30, 2022 at 1:11 AM Henry G Leach=
via Healeys <<a href=3D"mailto:healeys@autox.team.net";>healeys@autox.te=
am.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"m=
argin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left=
:1ex"><div>The way I understand it, is today its all about friction. Many o=
f 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 ma=
chining 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.=
=C2=A0<div><br></div><div>I tend to follow the proper parts assembly, so th=
at if there are five slots I fill them with 5 rings. My NOS replacement .02=
0 Mahle pistons had 4 and a matched set of Grant rings fit perfect. No blow=
by and good compression. Hank<br><br><div></div><p><br></p></div></div>
</blockquote></div></div>
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