I have owned my TR250 since it was new and many of the period road tests
stated that emissions was the reason for using carbs on the TR250.
Ironically, fuel injection is now the cleaner system, but it was at a
much more primitive stage of development in 1968. There were many other
modifications required to meet US emissions - cam, compression,
ignition, etc. I don't believe there were any appreciable differences
in fuels. My 250 was delivered in Coventry and was driven all over
Europe before shipment back to the states. It required premium
everywhere which was leaded in those days. It has never run as well on
lead free premium.
Larry
On 1/11/2013 2:23 PM, David Fidler wrote:
> Are you sure about that Larry? I've never actually seen the test results,
> have you?
>
> My guess is that the problem was more to do with the lower octane (RON)
> rating of US fuel. The UK PI TR5s (and TR6s) were designed to run on 4 star
> leaded fuel (97 octane), if they didn't meet the US regs, it's most likely
> the inferior fuel quality/lower octane was the cause. Europe has as strict,
> if not more stringent, emissions regs than the US and the PI TR5s and 6s
> passed those. Injected cars typically have better emissions than carbs,
> although the Lucas system was totally mechanical and therefore didn't have
> any of the modern electronic emissions control systems.y
>
> Just sayin'
>
> Fid.
>
> -----Original Message-----
> From: Larry Young [mailto:cartravel@pobox.com]
> Sent: Friday, January 11, 2013 11:36 AM
> To: David Fidler
> Cc: 6pack@autox.team.net
> Subject: Re: [6pack] Canada - TR5 or TR250
>
> The TR5 did not meet US Emission standards and could not legally be
> imported into the US.
>
> On 1/11/2013 10:27 AM, David Fidler wrote:
>> Larry,
>>
>> I don't think the dealer cared about that. The TR5s were able to exceed US
> and Canadian emissions standards anyway. The real reason (so I'm told) is
> they were dumbed down to Stroms because the US dealers created hell about
> having to maintain the Lucas injection system and the boffins at Triumph
> acquiesced.
>> Best regards,
>>
>> David.
>>
>> Sent from my iPad
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