George Lendich wrote:

Paul,
I've been trying to analyse our damper needs.

I've looked at Tracy's wide mounted donut dampers utilising the 
torque converter mounting holes. It's a good idea using
available mounting positions.

I've looked at Ken's suggested damper, which seems to be two 
mounting plates with rubber in between, but nicely made. The damper
material being more centrally located than Tracy's unit

I've looked at Don Dunbars unit, a nice one piece unit more centrally located than Tracy's unit.

I've taken account of what you have said in the past about having 
the damper mountings closer to the centre rather than out wide
and Tracy's testing of softer materials.

I also concur with your flange mount input shaft idea.

My only conclusion is that a one piece damper rubber about  5" diameter 
( of a yet to be defined hardness) about 20mm thick,
with mounting from the input shaft flange to the flex-plate, using 
the current flex-plate mounting bolt holes.

IMHO this is the easiest, cheapest, lightest and best solution, give 
all the information available to me, so far.

If you agree (and you may well not agree) - the finer points 
of mounting I leave open for discussion as this may require some
special mounting bolts.

I certainly will be using this idea on my own PSRU so any feed back is most welcome.

This may well solve Ken's immediate dilemma and test the concept for us.

George

Do you have the engineering data on the similar damper that Don Dunbar is using?

Paul Lamar
 
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