03-11-2017, 07:25 AM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,533
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Not Ranked
I will admit I was a little apprehensive when I selected the 4.25 crank for mine having been mostly a magazine engine builder for the most part and buying into the long strokes don't rev hype. But I have a Lightning PU and a Mustang GT with those long stroke modular motors and they rev like crazy so I went ahead with it. I mated it with a mid-weight Mcleod aluminum flywheel and I swear this hydraulic cam 459 revs like an electric motor nearly. I think a lot of it is in the balance work and care in assembly.
But, I can kind of agree with Patrick's view. If building a mechanical lifter, high compression, high reving motor a 4.125 crank makes Spock-type logical sense. If building a hydraulic lifter, mid-range torque motor, a 4.25 crank would appeal to Spock.
But from my limited experience I'm with Brent.
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