triumphs
[Top] [All Lists]

Re: [TR] Octane

To: <triumphs@autox.team.net>
Subject: Re: [TR] Octane
From: "dave" <dave@ranteer.com>
Date: Sun, 23 Sep 2018 11:44:52 -0500
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <007f01d452cd$46febd20$d4fc3760$@gmail.com> <1423983306.496331.1537709185209@connect.xfinity.com>
Thread-index: AQIOqEJxLdd/D6PFA5Vv0oDgLk26/AKqRyh+pHQWgcA=
Imho its all about compression ratio.   I believe once you get to about 9:1
you need premium.

Wikipedia shows it to be 9:1.  
Wikipedia show a TR4 and TR4a at 9:1, which makes sense, since they are
extremely similar to a TR3
W shows a TR250 at 8.5:1
W shows a spitfire at 8:1

I think that's your answer

-----Original Message-----
From: Triumphs <triumphs-bounces@autox.team.net> On Behalf Of TERRY SMITH
Sent: Sunday, September 23, 2018 8:26 AM
To: triumphs@autox.team.net
Subject: [TR] Octane

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
** triumphs@autox.team.net **

Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive

http://autox.team.net/mailman/options/triumphs/dave@ranteer.com

** triumphs@autox.team.net **

Archive: http://www.team.net/pipermail/triumphs  http://www.team.net/archive


<Prev in Thread] Current Thread [Next in Thread>