I was interested in if they give better results on turbo cars, from what I have heard that the more powerful the engine the more power they give like for example if you have a 200 hp set up and you get maybe 6-8 hp and 3-5 lbs of tourqe for 300 bucks its probly not worth it but with my setup I am making 423whp and 300 lbs of tourqe @ 20 psi so I would logically believe that the gains would be much greater??

also I am loking for actual proof like dyno or personal experience thanks

 

also whats the current verdict on lighter crank pullies in general? the repeated myth i kept hearing last time i looked into this is that it would throw the crank off balance from its factory form and stress the bearings, etc. any truth to this? it seems many people run these without premature wear. not to hi-jack your thread or anything...

 

i would stay away from aftermarkey pulleys. especially in high hp/torque applications.

I shattered 2 oil pumps thanks to mine. the lack of harmonic balance will create too much vibration...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tofurky &raquo;</TD></TR><TR><TD CLASS="quote">i would stay away from aftermarkey pulleys. especially in high hp/torque applications.

I shattered 2 oil pumps thanks to mine. the lack of harmonic balance will create too much vibration...</TD></TR></TABLE>

this is what i was talking about...thanks

 

underdriving the accessories is ok in my opinion, if you have any acc.'s left that is.

I would not invest in any kind of aftermarket crank pulley.

 

take out your a/c and power steering and that's the gain you would see MAYBE from an underdrive pulley, only this way you don't screw up oil pumps and spin rod bearings/throw rods through your block