[TR] fan extension, fan belt, steering rack

[Jack W. Drews]

I've run the MGB conversion on my race car for eleven years. I 
honestly don't know if it does any good or not, but it makes me feel 
like I've done everything possible short of buying a high priced 
aftermarket dampener. The theory of these dampener is that it helps 
dampen the torsional vibration imparted to the crank by our four 
banger engines. I agree with Randall that it doesn't make much 
difference on an engine seldom over the 6000 rpm line. You can do 
almost anything with these engines if you keep it below 6000.

What's required for the conversion is to shorten the extendion of the 
MGB pulley that would normally go through the front seal, and cut 
enough off of that portion of the TR pulley that it can serve as an 
extension plus give the right diameter for the seal. The only part 
that leaves me uneasy is the key in the crank does not engage much of 
the keyway in the pulley, but that hasn't caused a problem i my car 
and others with the same conversion. If anyone wants dimensions to 
cut these two pieces, contact me off list and I'll send them to you.

At 06:11 PM 9/1/2007, Randall wrote:
>Randall wrote
> >>  TriumphTune used to sell the parts to allow using the dampener from a
>BMC motor, but
> >>              AFAIK that kit has been NLA for a long time.
>
>Btmfdchn at aol.com replied
>
> > The dampener from a 3-main MGB will fit with slight modification to the
>key-way to make it a bit deeper.
>
>It takes a bit more than that, at least for the dampener I sourced from a
>MGB (maybe it was a 5 main ?).  The hub area is both shorter and smaller
>diameter; meaning you need a spacer between it and the crank gear to clear
>the timing cover (and line the belts up), plus a special seal to fit both
>the cavity in the cover and the smaller hub.  My understanding is that the
>TT kit was the spacer and special seal.  Of course, someone that was handy
>with a lathe could probably create a spacer that would perform both
>functions; or the seal might even be available off the shelf somewhere.
>
> > He didn't recall the details for the waterpump pulley, maybe TR6.
>
>Only the TR5/250 and possibly very early TR6 had removable pulleys.  At one
>time, VB had some NOS pulleys, but most likely they are gone now.
>
> >  His further recommendations were tufftriding the crank and a very precise
>balance job.
>
>Good advice.
>
>Randall
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uncle jack 



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