Underdrive pulley install

[YZF]

First car Ive owned worthy of modding so this is my first time around with it.

Its a 94 LT...lah dee dah..

From what I gather I need to pull the balancer off, put the underdrive on, then stab the balancer on top of it? Will the factory bolts be long enough?

Any info would be grand.

[jaysz2893]

should come with longer bolts and you will need a shorter belt. It is installed like you said.

[YZF]

I bought a set of headers/ORY from a guy and he threw the pulley and a 160 t-stat in with the deal.. along with 2 belts because he wasnt sure which one it was. So Ill have to get some longer bolts. I cant seem to get a puller on the balancer to get it off...

I just had it off doing the opti about 3k miles ago :(

Wish I had the pulley back then!

[BIGT94z]

its not hard at all. hell on my asp i ran a stock belt

[YZF]

I just need to know how long the bolts should be.

[Z28pr0jekt]

underdrive crank pulleys on our cars are pointless, I actually took mine off because of its idiocy. what sense does it make to shrink the diameter of the crank pulley when you're directly addicting mass to the rotating assembly. I had crappy charging with the crank pulley also.

[James Montigny]

I like the ASP 23% overdrive that replaces the stock balancer.
Specifically, I like it on a H/C car that runs a higher idle speed
(eliminates the charging issues Z28pr0jekt mentioned)
I had one on my old setup and I did notice that the motor revved up much quicker.

Keeping in mind that I also retained my PS and AC.
Cars without those accessories probably don't see as much of a gain.

I ran a slightly shorter belt, I have the PN around here somewhere.

[KissMyWhtSS]

Not worth it for a DD IMO, but since you got it as a package, why not install it.

I've heard of charging issues, but if you drive it daily I doubt you'll have a problem. Make sure the serpentine belt is the right size / tight.

[lt1-xjs]

underdrive crank pulleys on our cars are pointless, I actually took mine off because of its idiocy. what sense does it make to shrink the diameter of the crank pulley when you're directly addicting mass to the rotating assembly. I had crappy charging with the crank pulley also.
I would have to agree, although the ASP 945103 has the integrated balancer at half the weight and the overdrive alt. pulley. Mine have been on for 5-6 years with no issues and I assure you you will notice a gain. Pulley only = problems. A bolt-on 3900# at 12.86 et.

[Z28pr0jekt]

I like the ASP 23% overdrive that replaces the stock balancer.
Specifically, I like it on a H/C car that runs a higher idle speed
(eliminates the charging issues Z28pr0jekt mentioned)
I had one on my old setup and I did notice that the motor revved up much quicker.

Keeping in mind that I also retained my PS and AC.
Cars without those accessories probably don't see as much of a gain.

I ran a slightly shorter belt, I have the PN around here somewhere.

yes a replacement pulley isn't bad. I was more directing towards the piggyback pulleys such as the one he got.. I have mine laying around here somewhere.. i found it more trouble than it was worth

[sdmws6]

i have an underdrive pulley and have no charging issues. mine charges around 12 only when i have my lights on and brake pedal pressed, otherwise it's around 13. i think mine is a march pulley w/ 25% or so U/D.

[Adam]

underdrive crank pulleys on our cars are pointless, I actually took mine off because of its idiocy. what sense does it make to shrink the diameter of the crank pulley when you're directly addicting mass to the rotating assembly. I had crappy charging with the crank pulley also.

I have to disagree. A 25% loss in accessories for a aluminum pulley that weighs hardly anything. It is very light. I agree that you won't gain alot but heck every bit counts in my opinion.