My search for a cure for my TR6's front shimmy at 60 mph and over
included wheel balancing on and off the car, wheel straightening, front
suspension rebuild, replacement of one bent hub, new tires, and Panasport
wheels. The cause was most likely bent wheels and a second bent hub. The
moral is, investigate it all before spending money like Jay Leno- unless you
have that much. I found the wheels were bent laterally, and even though
"straightened", they were not true enough. The bent hub was discovered by
the shop turning the rotors for new pads. Unfortunately, the replacement I
bolted on was not straight either, and I assumed it was. The replacement
hub was trued up on a brake lathe by another shop after removing the wheel
studs. I had taken it in since the old rotor and the replacement hub were
not true to one another, causing excessive push back of the pads and
subsequent low pedal on first application. (keeps the pulse rate up!)
My second thought is a question: Does an Eaton/Magnusson supercharger
give more immediate low rpm improvement than a turbo even though the turbo
could give more upper rpm power?
The supercharger installations that have been done, how is the increase
measurable compared to stock, 3rd gear acceleration 2000-5500 rpm, or? The
McInnes and Bell books lead me to believe an intercooler is necessary, and
without it the improvement is an increase in density to 1.4. That would be
140 hp or so-is this correct? Also, the calculated flow through the 2"
carburetor should be around 280 cfm at 10 psi. boost. Can the 2" flow that
much?
Dennis,
'73 TR6
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