[TR] Electric Fans: Something Different

[Andrew Uprichard]

Both my TR3s have lightened flywheels which came from Racetorations.  No financial interest, but it is owned by my cousin, Darryl Uprichard, and if he is in a good mood I sometimes get a family discount.

 

Having driven several stock TR3s, I do notice the difference.  But then, both cars also have 89mm pistons, so I cannot ascribe it entirely to the flywheel.

 

Andrew Uprichard

Jackson, Michigan

 

From: Paul Dorsey [mailto:dorpaul1 at gmail.com] 
Sent: Monday, September 10, 2018 3:17 PM
To: john.macartney at ukpips.org.uk
Cc: jpaynepbr at cox.net; TERRY SMITH; Randall; auprichard at uprichard.net; ghaynestr4 at aol.com; Triumph list Team.net
Subject: Re: [TR] Electric Fans: Something Different

 

do they make a lighter flywheel?  What about Aluminum?

Paul

 

On Mon, Sep 10, 2018 at 9:30 AM John Macartney <john.macartney at ukpips.org.uk> wrote:

I think I'm correct in saying one of the reasons for the heavier flywheel is
that the wet liner four engine was originally designed for the Standard
Vanguard with a two speed (low and high) gearbox with overdrive and also the
Ferguson tractor - both of which engines needed to develop shedloads of
torque at very low engine speeds. In both instances, much heavier flywheels
were required. Even if the early TR's could have got away with lighter
units, that would have meant having two different units. In those early post
WW2 days, iron and steel in the UK was in such short supply that having a
'common' flywheel across the range made economic sense from a production
cost viewpoint. Just an opinion

Jonmac

-----Original Message-----
From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of
jpaynepbr at cox.net
Sent: 23 July 2018 00:38
To: 'TERRY SMITH' <terryrs at comcast.net>; Randall <tr3driver at ca.rr.com>;
Andrew Uprichard <auprichard at uprichard.net>; George Haynes
<ghaynestr4 at aol.com>; triumphs at autox.team.net
Subject: Re: [TR] Electric Fans: Something Different

I believe the TR2/3/4 was more or less "balanced" internally.  The flywheel
weighs about 3x what it needs to.  I believe they used the flywheel to
smooth it out.

Jonas Payne
PBR Consulting Services, LLC
702.882.6711



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