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It=E2=80=99s all about compression, higher compression needs higher octane t=
o prevent the pinging/knocking that will damage the pistons. That said, I u=
sually run regular grade in my stock TR3 or maybe step up to mid grade durin=
g the hot Texas summer months. =20
Bill B
Sent from my Handspring Treo
On Sep 23, 2018, at 9:51 AM, Geo Hahn <ahwahneetr@gmail.com> wrote:
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 S=
hell or Chevron. My TR3A doesn't seem to care what I put in it, runs fine o=
n 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 suppos=
e 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? =20
>=20
> Thanks, everyone,
> Terry
> ** triumphs@autox.team.net **
>=20
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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">It=E2=80=99s all about compression, higher c=
ompression needs higher octane to prevent the pinging/knocking that will dam=
age the pistons. That said, I usually run regular grade in my stock T=
R3 or maybe step up to mid grade during the hot Texas summer months. <=
div>Bill B<br><br><div id=3D"AppleMailSignature" dir=3D"ltr"><span style=3D"=
background-color: rgba(255, 255, 255, 0);">Sent from my Handspring Treo</spa=
n></div><div dir=3D"ltr"><br>On Sep 23, 2018, at 9:51 AM, Geo Hahn <<a hr=
ef=3D"mailto:ahwahneetr@gmail.com";>ahwahneetr@gmail.com</a>> wrote:<br><b=
r></div><div dir=3D"ltr"><div dir=3D"ltr">Terry -<div><br></div><div>I rathe=
r think it was due to compression ratio more than anything else. But y=
ou may just have to experiment a bit to see what works (adjusting advance, l=
istening for ping).</div><div><br></div><div>My TR4 uses premium at off-bran=
d stations but seems okay with regular from Shell or Chevron. My TR3A d=
oesn't seem to care what I put in it, runs fine on almost anything.</div><di=
v><br></div><div>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@comcas=
t.net</a>></span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Just curious.&n=
bsp; Why is Premium gasoline recommended for a TR3 (and I suppose other Triu=
mphs?)while regular is just fine for other vintage cars. I know it's t=
o prevent knocking, but how and why? Does it have to do with being a s=
hort-stroke engine or something? <br>
<br>
Thanks, everyone,<br>
Terry<br>
** <a href=3D"mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **=
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t=3D"_blank">http://www.team.net/donate.<wbr>html</a><br>
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a href=3D"http://www.team.net/archive"; rel=3D"noreferrer" target=3D"_blank">=
<br>
s/ahwahneetr@gmail.com" rel=3D"noreferrer" target=3D"_blank">http://autox.te=
am.net/mailman/<wbr>options/triumphs/ahwahneetr@<wbr>gmail.com</a><br>
</blockquote></div><br></div>
</div><div dir=3D"ltr"><span>** <a href=3D"mailto:triumphs@autox.team.net";>t=
riumphs@autox.team.net</a> **</span><br><span></span><br><span>Donate: <a hr=
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