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Redpoint5,
The pulley set is machined from some high grade aluminum yet retains the old harmonic balancer. It appears to be about 25% smaller in diameter than the stock crank pulley.
It is made by BBK and on YouTube there is a short video showing the installation of a similar set of parts on a Mustang. At the end they do a dyno test to show the increase in power across the RPM band. Their results do not match the claims of 10-15 horsepower but are more like 3-8 horsepower. Even at that level, one can feel the difference. It is the most impressive increase in power I have noticed to date with all the different things I have done to make things more fuel efficient.
I will be doing a 90 mile road test tomorrow on a regular route I have done other road tests on recently. That will be a better evaluation than the short test I just completed yesterday.
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