[Fot] TR Racing cranks

[Larry Young]

Greg,
To get a larger radius on the crankpins, do you weld the edges and then 
regrind? On my current engine, I welded the edges of the crankpins to 
reduce their width so they would accommodate chevy rods. I them reground 
with a larger radius to reduce the stress riser.  This is a cheap 
approach that addresses both weaknesses, rods and cranks.  Others on the 
list have used chevy or other commodity rods, but have used spacers at 
the wrist pin to center the rod. The only problem is that welding puts a 
lot of stresses in the crank and proper nitriding requires stress 
relieving.  The grinder had a hard time getting it straight.  He said it 
was out 0.022 the first time it came out of the oven.
Larry Young

Greg Solow wrote:
> A good used crank properly race prepared, deep case nitrided and 
> ground with the proper radii on the journals, is very reliable at 
> power outputs of up to 165 hp as long as the revs are kept below 6800 
> rpm. The weak link in bottom end is the connecting rod. For use over 
> 6,000 rpm they need to be replaced with steel billet rods.
>                                                                     
>                             Greg Solow
>
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