Underdrive pulley

[csfirefighter23]

I know that this is prob. an old subject but i am new to nico, but i was wondering if the underdrive that i got for my s13 ka would harm the crank in anyway due to it not being the stock harmonic thanks

[TDS]

Over 2 yrs with one and never had problems...

[csfirefighter23]

thanks is it an ebay or name brand? i wasnt shure sence the stock harmonic didn't seem to have any specific balancing weights to it

[csfirefighter23]

and how much did it help power wise? and revs

[TDS]

Its a brand name (ASP). Alone, i doubt you could tell a significant difference, but add a lightweight flywheel and driveshaft and that should really improve revving

[csfirefighter23]

thanks my underdrive is an ebay hopefully it will hold up

[s13rb25det]

do you guys ever have your engine run a LITTLE hot due to the pulley being smaller and not moving the coolant fast enough? my friend had one on a old stang and it ran a little hot in the summer because of it.

[csfirefighter23]

not yet havent got the car on the road yet, but the make overdrive pulleys to correct the size diff for the water pump but i had a buddy this a fox body stang he put on a flex fan it it would run a little hot in warmer weather i thing it is a ford thing. lol