Quote:
Probably because the link is 8 years old........
Yep.
There just isn't a real need for a gear drive like Dan said except may the top guys with the fastest cars...even then it is a "push" at that...
Most of the "other" brand guys in my local use them on the V-8's... since I work with some that are hard core racers, I asked one day what the parasitic loss was on their engines.... the answers I got back were about the same... quite a few have dyno'd their engines over the years, and they loose about 10% of their power over all on a mild engine (NA under 600 HP)... they loose a lot less if it's a big block torque monster in the 800+ HP range.... the reason they install it, is so that they don't get timing chain stretch repeatedly hammering the engine the amount that they do...so ultimately it's about keeping the timing and cam to crank phasing rock solid over the course of the engine's race duration...
Since we have to crape for every penny and nickel of power in our engine, I would never want to build up a street engine at 250 hp, then give back 25....that just doesn't pencil out economically in the build...
Even if I justified it with solid phasing and say a crank trigger to keep the timing from eventually walking, it's still a high price to pay for most of our applications..