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Terry -
I rather think it was due to compression ratio more than anything else.
But you may just have to experiment a bit to see what works (adjusting
advance, listening for ping).
My TR4 uses premium at off-brand stations but seems okay with regular from
Shell or Chevron. My TR3A doesn't seem to care what I put in it, runs fine
on almost anything.
Geo
On Sun, Sep 23, 2018 at 6:26 AM, TERRY SMITH <terryrs@comcast.net> wrote:
> Just curious. Why is Premium gasoline recommended for a TR3 (and I
> suppose other Triumphs?)while regular is just fine for other vintage cars.
> I know it's to prevent knocking, but how and why? Does it have to do with
> being a short-stroke engine or something?
>
> Thanks, everyone,
> Terry
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<div dir=3D"ltr">Terry -<div><br></div><div>I rather think it was due to co=
mpression ratio more than anything else.=C2=A0 But you may just have to exp=
eriment a bit to see what works (adjusting advance, listening for ping).</d=
iv><div><br></div><div>My TR4 uses premium at off-brand stations but seems =
okay with regular from Shell or Chevron.=C2=A0 My TR3A doesn't seem to =
care what I put in it, runs fine on almost anything.</div><div><br></div><d=
iv>Geo</div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote"=
>On Sun, Sep 23, 2018 at 6:26 AM, TERRY SMITH <span dir=3D"ltr"><<a href=
=3D"mailto:terryrs@comcast.net"; target=3D"_blank">terryrs@comcast.net</a>&g=
t;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
.8ex;border-left:1px #ccc solid;padding-left:1ex">Just curious.=C2=A0 Why =
is Premium gasoline recommended for a TR3 (and I suppose other Triumphs?)wh=
ile regular is just fine for other vintage cars.=C2=A0 I know it's to p=
revent knocking, but how and why?=C2=A0 Does it have to do with being a sho=
rt-stroke engine or something?=C2=A0 <br>
<br>
Thanks, everyone,<br>
Terry<br>
** <a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> *=
*<br>
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et=3D"_blank">http://www.team.net/donate.<wbr>html</a><br>
Archive: <a href=3D"http://www.team.net/pipermail/triumphs"; rel=3D"noreferr=
er" target=3D"_blank">http://www.team.net/pipermail/<wbr>triumphs</a>=C2=A0=
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k">http://www.team.net/archive</a><br>
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hs/ahwahneetr@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.=
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</blockquote></div><br></div>
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