Date sent: Sun, 17 Sep 2000 04:55:18 -0400
From: David Massey <105671.471@compuserve.com>
Subject: Re: Triumph TR6 on the dyno [long]
To: Trevor Boicey <tboicey@brit.ca>
Copies to: "triumphs@autox.team.net" <triumphs@autox.team.net>,
"[unknown]" <ingate@horizon.com>
Send reply to: David Massey <105671.471@compuserve.com>
Message text written by Trevor Boicey
> As the years of the TR6 went on, the 150hp of the UK spec
car got knocked down a few pegs, I think it finished up around
125hp. I am unsure of the details why, it wasn't emissions. Maybe
it was trying to improve the reliability of the PI and the
manners of that crazy cam?
<
According to Bill Poggott it was a combination of the camshaft change and
the change in measurement to the DIN standard so the actual reduction in HP
was not as dramatic as it would seem.
Dave Massey
----------------------------
Dave you are right,speeking in DIN HP the 69 to 72 TR6, CP series,
delivered 143HP at 5500 RPM at the flywheel, to improve driving
comfort,( the 143HP TR6 is terrible to drive in town and in traffic
jams), a milder cam was fitted from model year 73, CR series, and
HP decreased to 124 DIN at 5000 RPM. So the difference is less
than 20 HP DIN for the fuel injection models. Whith the new cam
the best volumetric efficiency was probably attained at lower RPM
As on the CP models the clutch was very heavy and leading to
cramps in the left leg , the master cylinder was also replaced to
improve the clutch operation.
To compare with the American market TR6 with Strombergs the
DIN figures should be the following: up to 72 - 98 HP DIN at 4900
RPM and from model year 73 - 95 HP DIN at 4500 RPM.
The information is as published in factory folders and in different
European Classic car magazines, but there is always a certain
discrepancy to be noticed of 1 or 2 HP due to conversion from
SAE to DIN.
Regards
Jean
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