newbie question - underdrive PUlley

[mynismo]

QUICK QUESTION...

is there an underdrive pully in a 1990 240sx automatic??? if so where is it located?

[95_SX_SE]

Unorthodox Racing and Automotive Specialties Performance (ASP) are the two I know of. Here's a better question though...what is the difference between them besides price?

[TatII]

they can fit on any KA. they fit in place of hte stock crank pulley. to remove them you need to take out all 3 belts , a/c, power steering, and alternator. you can reuse the a/c belt beucsae they are the same size. but you will need to change the alternator and power steering to smaller sizes. i forgot what sizes i put on my car. but if you do get it, i can always just look in my car and get the belt numbers off my car. anyhow. from what i've read, there is a difference between the asp and UR. but its not worth the extra cash. here is the order to in stall the pulley.
1:remove the stock pulley you need to take a breaker bar, put the on the pulley nut, then hit the starter then the nut will come loose.

2:then as your replace it with the new unit, you need to put lithium grease on the grooves so you don't tear your seals up on the crankcase.

3: then to tighten the car, you put the car in gear, then you have someone step on the brake. this will lock the engine. so you can torque down the center bolt.

[Sanchi]

Hey thats a very good detailed step by step instructions on how to change it your self TatII it should go in the FAQ hahahah but hey now i have a good ideal on how to do it myself hehe

[TatII]

if you have a friend a all the right tools, (pry bar, 14mm socket, deep sockets, lithium grease, and a 1 1/8th inch socket for the crank bolt) it should take no longer then 2 hours. when we were installin it in the corner of my friends block, it was dark and freakin cold. plus we didn't have a pry bar. so we had to use a screw driver. that was not cool. it took us atleast an hour tryin to pry that sucker off. the cops even came and questioned us. they were like

cop:"what are you guys doin?"
us: "we're fixin the car"
cop: "is this car yours?"
us: "yeah, why?"
cops: someone called the cops sayin that they see 2 guys tryin to break in to a car"
us: "we'll we've been here for almost 3 hours now, if we're car theives that takes this long, we deserve to get caught"
cops: "ha, yeah i remmeber seeing you guys around before workin on the same car, alright carry on"