Who has played around with underdrive pulleys?

[ACiFiC]

Just looking around at some things.. and wondering and actual gains from these?

[mrhobbz]

Re: Who has played around with underdrive pulleys?

waste of money on these cars even if you can find some imo.

[darkflare999]

Re: Who has played around with underdrive pulleys?

s0o what its better to buy the stock ones??...i wanna know bout these t0o cuz 2-3 of my pulley's are squeaking...

[whitdog54]

Re: Who has played around with underdrive pulleys?

ZZP makes them i believe. Good for a couple ponys and probably faster acceleration..idk.

[Derek3.4]

Re: Who has played around with underdrive pulleys?

If I remember correctly, the underdrive pulley set works well for the 3.4 and doesnt make much of a difference for the 3.8. Someone correct me if I'm wrong.

[ACiFiC]

Re: Who has played around with underdrive pulleys?

I dont know they make it sound good when they sell it

[Derek3.4]

Re: Who has played around with underdrive pulleys?

look around in the search a little. I pretty sure I'm right though. I'm sure they help a little on the 3.8. Do whatever you want tho, it's your ride and every little bit counts in HP. :)

[ACiFiC]

Re: Who has played around with underdrive pulleys?

Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air conditioner all rob horsepower from the engine. By replacing factory-sized crank and accessory drive pulleys with a resized pulley, the accessories are slowed, resulting in more horsepower available to drive the rear wheels. Typically, a set of underdrive pulleys will increase output by 7-12 horsepower, resulting in quarter mile improvements of .1 to .2 seconds.... so probably 1-2 ponies

[bwkmaro]

Re: Who has played around with underdrive pulleys?

ive heard useless on the 3.8 but nice upgrade on a 3.4

[darkflare999]

Re: Who has played around with underdrive pulleys?

soo whats the good pulley set thats out there??

[mrhobbz]

Re: Who has played around with underdrive pulleys?

Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air conditioner all rob horsepower from the engine. By replacing factory-sized crank and accessory drive pulleys with a resized pulley, the accessories are slowed, resulting in more horsepower available to drive the rear wheels. Typically, a set of underdrive pulleys will increase output by 7-12 horsepower, resulting in quarter mile improvements of .1 to .2 seconds.... so probably 1-2 ponies

The 3.8 pulleys are already underdriven out of the factory i doubt you'll see 12hp out of buying an aftermarket set

[ssms5411]

Re: Who has played around with underdrive pulleys?

On my 200 amp Alt that just came , it has a smaller pulley on it, they say its suppose to help the output of the Alt. at idle, I haven't installed it yet but will see.

[97rs4life]

Re: Who has played around with underdrive pulleys?

On my 200 amp Alt that just came , it has a smaller pulley on it, they say its suppose to help the output of the Alt. at idle, I haven't installed it yet but will see.

yea my reman. alternator came with a smaller pulley too. I left it on there. :)

[ssms5411]

Re: Who has played around with underdrive pulleys?

yea my reman. alternator came with a smaller pulley too. I left it on there. :)

Did you notice a difference at idle in voltage?

[97rs4life]

Re: Who has played around with underdrive pulleys?

Did you notice a difference at idle in voltage?

no idea really, I did it before I got into heavily modifying the car and didn't pay attention to it before as I didn't plan on the pulley being different.