On 26 Dec 2006 at 13:48, John Macartney wrote: > It's clear to me in the UK that the US and Europe generally > have different methods for calculating octane. We use RM for > 'research method, whereas I think you guys in the US have a > comparable fuel, though the octane is measured differently?
Pumps used to list it as (R+M)/2. I haven't noticed lately, but it has been this way for at least 25 years, IIRC. AS I understand it, it lowered the rating by a click or two, but I can't recall which was the lower of the two ratings, R or M. But the specified target of 95 was for an '80 car, well after that had become the standard for octane rating here in the US. So unless that target was meant for UK gas and never corrected for the US, the 95 figure would still apply. > I was taken for a ride in one of the last US spec Spitfires less > than a month ago that had been re-imported to the UK... > there was just no way it would do more than 60mph. Wow. They do not have that reputation here, AFAIK. Even before my tired engine was rebuilt it had no trouble doing 85. I'm pretty sure it would do 90 now, though I have never tried. Admittedly it does not have all the original plumbing but it does have some, and back when Massachusetts' emission rules still applied to '80 cars it met them with ease. -- Jim Muller [EMAIL PROTECTED] '80 Spitfire, '70 GT6+ Your messages not reaching the list? Check out http://www.team.net/posting.html === This list supported in part by The Vintage Triumph Register === http://www.vtr.org === Help keep Team.Net on the air === http://www.team.net/donate.html === unsubscribe/change address requests to [EMAIL PROTECTED] or try === http://www.team.net/cgi-bin/majorcool === Other lists available at === http://www.team.net/mailman/listinfo === Archives at http://www.team.net/archive === http://www.team.net/the-local === Edit your replies!
