Underdrive Pulleys

[Paseo2nr]

I've heard some both positive and negative things about underdrive pulleys, and i know some members have them here. have you had problems with them, seen any damage to the engine or otherwise? I'm thinking about buying them, but some supra owners have told me that it's screwed up their crankshaft, which worries me. please

[toyotasera.co.uk]

They don't have any damping to them which is the main problem. I would get your flywheel lightened slightly instead and retain the original pulley.

[Maximum Paseo]

I heard they had 40-50 hp to the wheels, but I wouldn't get them unless i got a stronger crank.

[Paseo2nr]

no. 8whp.