And I've seen cranks broken by those who drive on public roads whose engines
had the factory fan and rubber "dampers"... A lonely Sunday night on Highway
301 near Folkston,GA 40 years ago: "What was that noise Barry?"
Ed Woods
----- Original Message -----
From: "Randall" <tr3driver@comcast.net>
To: <triumphs@autox.team.net>
Sent: Tuesday, May 30, 2006 4:34 PM
Subject: RE: [TR] TR3a without mechanical fan
>> Jim, Those small rubber grommets would not serve as a vibration
>> damper for the crank in the traditional sense of crank dampers.
>
> I'm curious why you think that, Jerry. I've seen statements from both the
> factory, and race engine builders, that they do serve that purpose. That
> big metal fan provides the weight (usually found in a solid ring on a
> 'normal' damper) and the rubber provides the elastomeric element to dampen
> ringing. I've also seen the cranks broken by those who race without a
> damper.
>
>> That is at idle at a long stop light or
>> in slow traffic and before the electric fan's thermostat kicks
>> the fan on there is considerable build up of underhood
>> temperature. This leads to gas boiling in the float bowls from
>> latent heat from the exhaust manifold not being blown away by the
>> engine driven fan. I use a manual over ride when I'm in that situation.
>
> Another solution of course would be to add a thermostat to sense underhood
> temperature and start the fan. Even some 'modern' cars did this, before
> fuel injection eliminated the float bowls.
>
> Randall
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