UD pulley
05-07-2007, 09:06 AM
#1
2nd Gear Member
Thread Starter
Join Date: Jan 2007
Location: MA
Posts: 201
UD pulley
What kind of gains would you expect out of an underdrive pulley?
heres one I was looking at
http://www.vmptuning.com/store/index...d=91&parent=46
heres one I was looking at
http://www.vmptuning.com/store/index...d=91&parent=46
05-07-2007, 11:00 AM
#2
3rd Gear Member
Join Date: Mar 2007
Location:
Posts: 843
RE: UD pulley
there are mixed reviews about the UDP. you should be expecting a 5hp-10hp increase if you install. the downside is to some it can be a hard installation, some said that they haven't had any increase in power, and some said that the power comes on 30 minutes after you start your car and the worst i've heard is that some of them have caused damage to the motor, but i'm sure that's on rare occasions.
im probably still going to get a UDP though. i'm still researching on which is the best and so far i think motoblue would probably be the best one. ADP is the cheapest, that's also something to consider.
im probably still going to get a UDP though. i'm still researching on which is the best and so far i think motoblue would probably be the best one. ADP is the cheapest, that's also something to consider.
05-07-2007, 11:46 AM
#3
2nd Gear Member
Join Date: Oct 2006
Posts: 383
RE: UD pulley
PITA install. takes forever, and you have to get the right tools (may need an air wrench to break the pulley free). I wouldn't bother, and besides, many of the people on the forums have had alternator failure issues after installing.
05-09-2007, 12:58 AM
#4
1st Gear Member
Join Date: Nov 2006
Location:
Posts: 55
RE: UD pulley
dunno if it really gives you an increase, never dyno'd the car...i can see where the idea of reducing the accessory drive would free up power but im not swearing to it or at it at the moment. been on about 6 months and no alternator/overheating/etc.problems either so dont be scared to do the crank udp.
05-09-2007, 01:23 AM
#5
3rd Gear Member
Join Date: Mar 2007
Location:
Posts: 843
RE: UD pulley
ORIGINAL: jettblack06
dunno if it really gives you an increase, never dyno'd the car...i can see where the idea of reducing the accessory drive would free up power but im not swearing to it or at it at the moment. been on about 6 months and no alternator/overheating/etc.problems either so dont be scared to do the crank udp.
dunno if it really gives you an increase, never dyno'd the car...i can see where the idea of reducing the accessory drive would free up power but im not swearing to it or at it at the moment. been on about 6 months and no alternator/overheating/etc.problems either so dont be scared to do the crank udp.
05-09-2007, 06:24 AM
#7
5th Gear Member
Join Date: May 2006
Location: DBN, MI
Posts: 2,578
RE: UD pulley
I did the Alt pulley, works nice and it was a 15 minute install. No breakage on the alt it still works fine. I got it used for $75 and am happy with the performance I've gotten. Pauls high performance in Michigan sells them. Cheaper than the crank pulley too.
05-09-2007, 10:08 AM
#8
5th Gear Member
Join Date: Sep 2005
Location:
Posts: 2,750
RE: UD pulley
The crank pulley has been shown to give you 4 to 6 RWHP... a far cry from the claimed gains... Also I found that the recommended belt was to long. It ended up rubbing on my alternator cover which covered everything is rubber dust and messed up my painted cover... also found it slipped a bit...
05-09-2007, 10:33 AM
#9
3rd Gear Member
Join Date: Mar 2007
Location:
Posts: 843
RE: UD pulley
ORIGINAL: rmays06
I did the Alt pulley, works nice and it was a 15 minute install. No breakage on the alt it still works fine. I got it used for $75 and am happy with the performance I've gotten. Pauls high performance in Michigan sells them. Cheaper than the crank pulley too.
I did the Alt pulley, works nice and it was a 15 minute install. No breakage on the alt it still works fine. I got it used for $75 and am happy with the performance I've gotten. Pauls high performance in Michigan sells them. Cheaper than the crank pulley too.
05-09-2007, 05:59 PM
#10
5th Gear Member
Join Date: May 2006
Location: DBN, MI
Posts: 2,578
RE: UD pulley
ORIGINAL: jaded seconds
i found the website. do you knowhow much does he sell them for?it doesn't list the alt pulley on the site. would i have to call them?
ORIGINAL: rmays06
I did the Alt pulley, works nice and it was a 15 minute install. No breakage on the alt it still works fine. I got it used for $75 and am happy with the performance I've gotten. Pauls high performance in Michigan sells them. Cheaper than the crank pulley too.
I did the Alt pulley, works nice and it was a 15 minute install. No breakage on the alt it still works fine. I got it used for $75 and am happy with the performance I've gotten. Pauls high performance in Michigan sells them. Cheaper than the crank pulley too.
GOOD LUCK!