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I find it hard to believe that light oils contribute to =E2=80=9Cwear=E2=80=
=9D in the carbs. The oil isn=E2=80=99t there to lubricate the carb =E2=80=
=94 it=E2=80=99s there so that its viscosity acts as a damper to piston =
movement. Higher viscosity would enhance dampening (and then, consider, =
how much dampening do you want?), but it wouldn=E2=80=99t have any =
effect on wear that I could see. I suppose it is conceivable that it =
would help mitigate the effects of prior wear (presumably there is some =
on 60-year-old carbs) by filling the gaps and restoring the intended =
level of dampening, but this would need to be established on a =
case-by-case basis.
Are you sure he wasn=E2=80=99t merely using the 90W as a cure for this =
particular application?
--
Max Heim
'66 MGB
> On Jun 15, 2021, at 1:17 PM, Michael MacLean =
<springer.mike51@gmail.com> wrote:
>=20
> I watched a recent John Twist video today on fitting H type SU carbs =
to a T type MG. In the video he says to use 90 wt gear oil in the =
dashpot. He also said the lighter oils and ATF that so many people =
recommend contribute to the early wear and tear on the carb. Anyone =
else using this weight oil in the carb? All my life I have been putting =
20 wt oil inthe dashpot.
> Mike MacLean
> 1969 MGB GT
> 1960 Austin Healey Sprite
> 1956 Austin Healey BN2 LeMans
> _______________________________________________
>=20
> Mgs@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.75
>=20
> Archive: http://www.team.net/pipermail/mgs =
http://autox.team.net/archive
>=20
> Unsubscribe: =
http://autox.team.net/mailman/options/mgs/mvheim@sonic.net
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">I =
find it hard to believe that light oils contribute to =E2=80=9Cwear=E2=80=9D=
in the carbs. The oil isn=E2=80=99t there to lubricate the carb =E2=80=94=
it=E2=80=99s there so that its viscosity acts as a damper to piston =
movement. Higher viscosity would enhance dampening (and then, consider, =
how much dampening do you want?), but it wouldn=E2=80=99t have any =
effect on wear that I could see. I suppose it is conceivable that it =
would help mitigate the effects of prior wear (presumably there is some =
on 60-year-old carbs) by filling the gaps and restoring the intended =
level of dampening, but this would need to be established on a =
case-by-case basis.<div class=3D""><br class=3D""></div><div =
class=3D"">Are you sure he wasn=E2=80=99t merely using the 90W as a cure =
for this particular application?<br class=3D""><div class=3D""><br =
class=3D""><div class=3D"">
<div style=3D"color: rgb(0, 0, 0); letter-spacing: normal; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;" class=3D""><div style=3D"color: rgb(0, 0, 0); =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"margin: 0px; font-size: 13px;" =
class=3D"">--</div><div style=3D"margin: 0px; font-size: 13px; =
min-height: 16px;" class=3D"">Max Heim</div><div style=3D"margin: 0px; =
font-size: 13px;" class=3D"">'66 MGB</div></div></div>
</div>
<div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Jun 15, 2021, at 1:17 PM, Michael MacLean <<a =
href=3D"mailto:springer.mike51@gmail.com"; =
class=3D"">springer.mike51@gmail.com</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div dir=3D"ltr" =
class=3D""><div class=3D"">I watched a recent John Twist video today on =
fitting H type SU carbs to a T type MG. In the video he says to =
use 90 wt gear oil in the dashpot. He also said the lighter oils =
and ATF that so many people recommend contribute to the early wear and =
tear on the carb. Anyone else using this weight oil in the =
carb? All my life I have been putting 20 wt oil inthe =
dashpot.</div><div class=3D"">Mike MacLean</div><div class=3D"">1969 MGB =
GT</div><div class=3D"">1960 Austin Healey Sprite</div><div =
class=3D"">1956 Austin Healey BN2 LeMans<br class=3D""></div></div>
_______________________________________________<br class=3D""><br =
class=3D""><a href=3D"mailto:Mgs@autox.team.net"; =
class=3D"">Mgs@autox.team.net</a><br class=3D"">Donate: =
$12.75<br class=3D""><br class=3D"">Archive: =
http://www.team.net/pipermail/mgs http://autox.team.net/archive<br =
class=3D""><br class=3D"">Unsubscribe: =
http://autox.team.net/mailman/options/mgs/mvheim@sonic.net<br =
class=3D""></div></blockquote></div><br =
class=3D""></div></div></body></html>=
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