So i picked me up a pair of AEM underdrive pulleys anyone have any experience from these good bad any info would be appreciated

 

anyone?

 

There is no noticeable difference besides the A/C is a little weak at idle.

-Aaron

 

yes on the P/S pulley.

an emphatic NO on the Alternator pulley if you have any sort of additional electronics (subs, neon, etc.). it'll kill your battery.

 

what about power differences? install them and do a post

 

parts already installed. have been for quite some time. had them on the old motor.

as for gains, minimal. nothing you can feel by the ***-dyno, but in your mind you can. but i'm sure it does help out somewhere. not sure if anyone has actually dynoed their car after JUST the pulley install.

 

I searched this topic last night and found that they make 4whp on 5th gen preludes

 

Not that it is the same case, but when I put them on my old R and dyno'd them, I made a whopping 0-2 whp accross the board and 0-1 wtq. Not really worth much, but every little bit helped.

For a $150 or so, they are worth it if you have the money to blow. But that is only after you have done the i/h/e/cam gears/timing/tuning route. You can get more whp adjusting your timing for a half hour on the dyno at about $50 then you can from the pulleys.

 

yeah i was just given these otherwise i wouldnt have bought it, as for the people who said if i put the alternator itll kill my batt if i have a system, could i knot put it on the alternator one and just like ps?

 

It doesn't actually kill your battery. It doesnt let it charge right cuz the pulley is too big and it doesnt spin fast enough. If I let my car sit for more than a week then my battery would be dead. But driving around daily it remains charged. I have a some what decent sound sytem in my car.

 

yeah, you could forsake the alt. pulley and just do the p/s pulley. that is what i have done. i have approx. 1000watt RMS system in the car, and that plus the PIAA foglights is a killer. and mine was daily driven too, but it all depends on your car.

 

if you put it on the alternator, at idle it will not product enough current even if you don't have a big stereo system, it will drain ur battery, that's what happened to mines

 

they won't give produce significant power gains. waste of money imo...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by safe driver &raquo;</TD></TR><TR><TD CLASS="quote">they won't give produce significant power gains. waste of money imo...</TD></TR></TABLE>

got them for free so i dont care haha i wouldnt buy these personally either