underdrive pulleys

89-5oh · 05-25-2002, 10:59 PM

what kind do you suggest? I don't know much about them.

joe4speed · 05-26-2002, 01:23 AM

Basically they'll all be the same, really just the finish is different. I have Auto Specialties, and I believe March makes some nice polished aluminum ones...

Ieatcamaros · 05-26-2002, 12:36 PM

I had these on my 89 gt and they completely ruined my alternator and battery. I put a new one of each on and they ruined my second alternator. Of course, this time I caught it before I ran the battery down. Warranties are nice for this too. I didn't have to buy that third alternator, just traded. After that, I took the pulleys off and sold them as quick as I could. I could not be paid to buy another MAC product. The pullies didn't make any noticeable power on the street anyway. I hope this helps you on your decision.

joe4speed · 05-26-2002, 12:46 PM

That's true.... I got rid of the alternator pulley after the second battery and third alternator, finally upgraded to the 130 amp one but didn't put the pulley on... all was well after that...

1BAD302 · 05-26-2002, 04:30 PM

So you guys wouldnt really recommend under drive pulleys? I dont feel like going through the hastle of changing my alternator and battery 3 times....

Ieatcamaros · 05-26-2002, 10:51 PM

My suggestion is not on an everyday street driven car. In my opinion, they really do not make that much noticeable difference in power except for in the upper rpm range. Just my .02 worth.

89-5oh · 05-27-2002, 12:01 AM

why is it that everyone gets pulleys if they cause the alternater to go? I don't want to cause damage to my car, but I have heard that they are an advantage to have. Do you suggest that I not get them?

joe4speed · 05-27-2002, 12:39 AM

I still have the pullies on mine, just not the alternator one.
They also sell a pulley set that is big stereo friendly!

Ieatcamaros · 05-27-2002, 03:54 PM

I know a lot of people in my area who get them just to say that they have 'em. Also to say that they modified their stang. Every one of them has had to buy a new alternator. On a bone stock car, they do not make that much difference. Whey they make power is when you are turning higher rpms and have 15 other mods to go along with it. If you are hell bent on getting a set of pulleys get the stereo friendly set like JL1314 mentioned. I know $80 sounds like a cheap mod, but it will cost you in the long run. That is on a daily street driven car.

MattwantsSpeed · 05-27-2002, 08:21 PM

Some please remind me......there is the alternator pulley, crnk pulley and water pump (??) pulley??? So what I read is that it's recommended to get just the WP and crank pulley? What if u use the alt. pulley with a 130amp alt.?

Bad89stang · 05-28-2002, 01:54 AM

Quote:

Originally posted by MattwantsSpeed
Some please remind me......there is the alternator pulley, crnk pulley and water pump (??) pulley??? So what I read is that it's recommended to get just the WP and crank pulley? What if u use the alt. pulley with a 130amp alt.?

With the 130amp alternator you should definitely be able to run the alt. pulley. I have a set of March underdrives on my car and have had no problems at all. My lights get a little dim at night with the A/C on, but I never have any starting problems the next day. Eventually, I will change out my alternator, but I am in no hurry.

Coupe5oh · 05-28-2002, 02:30 AM

Yea i just have asp crank pulley, w/ steeda water pump pully, stock alt, no problems with an autocrap 60 amp alternator, like bad89 says, i get a little dim with my a/c, electric fan, ect...eventually im gonna order a 100 amp jegs alt.

1989GT · 05-28-2002, 06:46 AM

Yeah I run the ASP crank and water pump pulleys, haven't had any problems. I'd say they're worth a .1 or two and 1-2 MPH so yeah I think they're worth it. Just my $.02.

jrgoffin · 05-28-2002, 08:21 AM

Yeah, for drag racing, you might get a tenth or two at WOT, but for the street, they are a waste. As everyone agrees, your battery will not charge at idle (which eventually trashes your battery) and the lights will dim, etc. Also, the water pump now turns slower - for a car in traffic, this means it will run hotter. You won't notice any real improvement in every day driving!

UglyFast88 · 05-28-2002, 08:28 AM

Hey- not knowing crap about pullies and their effect on alternators, thinking back, my car already had pullies on it when I bought it. However, it also had a new alternator.

My lights are dim until the RPM's get above 1250, and are relatively sensitive to the throttle. Is this because of the pullies?

I've already replaced the battery, thinking it was weak but it wasn't bad, anyway.

jrgoffin · 05-28-2002, 08:34 AM

The alternator ALSO turns slower which means it won't charge the battery until the RPM's increase, usually above 1200-1500.

mysweetlx · 05-28-2002, 01:14 PM

I've got the March pulley set......and I can't stand the dimming lights at idle and not beig able to start te car after 3 days of non-use. I'm thinking about throwing the stoc pulleys back in, but I was told that getting an Optima battery would help w/ the starting problem. Input?

joe4speed · 05-28-2002, 02:37 PM

I have an Optima battery and it's great, but even the best batteries will lose charge if the alternator isn't putting out!! (heh heh)

Hethj7 · 05-28-2002, 09:48 PM

I have the march pulleys and notice the dim lights and low charge at idle, but I have never had a problem starting the car or had to replace a battery or alternator because of the pulleys.

mysweetlx · 05-29-2002, 01:18 PM

Hethj7, even after 3 days of not starting it up???

05-25-2002, 10:59 PM	#1
89-5oh Registered Member Join Date: May 2002 Location: avon lake, ohio Posts: 8	underdrive pulleys what kind do you suggest? I don't know much about them. __________________ 89 lx 5.0, ram air w/ K&N filter, 1 5/8 in bbk shorty headers, 2 1/5 in dynomax exhaust (soon to be flowmaster), pony wheels.

05-26-2002, 01:23 AM	#2
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	Basically they'll all be the same, really just the finish is different. I have Auto Specialties, and I believe March makes some nice polished aluminum ones... __________________ *Joe!* 1988 GT, 13.58@101mph Check out my listing! Click here! Or my website:www.joe4speed.com

05-26-2002, 12:36 PM	#3
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Mac pulleys I had these on my 89 gt and they completely ruined my alternator and battery. I put a new one of each on and they ruined my second alternator. Of course, this time I caught it before I ran the battery down. Warranties are nice for this too. I didn't have to buy that third alternator, just traded. After that, I took the pulleys off and sold them as quick as I could. I could not be paid to buy another MAC product. The pullies didn't make any noticeable power on the street anyway. I hope this helps you on your decision. __________________ The sig says it all.

05-26-2002, 12:46 PM	#4
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	That's true.... I got rid of the alternator pulley after the second battery and third alternator, finally upgraded to the 130 amp one but didn't put the pulley on... all was well after that... __________________ *Joe!* 1988 GT, 13.58@101mph Check out my listing! Click here! Or my website:www.joe4speed.com

05-26-2002, 04:30 PM	#5
1BAD302 Registered Member Join Date: May 2002 Location: Vancouver, BC Posts: 79	So you guys wouldnt really recommend under drive pulleys? I dont feel like going through the hastle of changing my alternator and battery 3 times.... __________________ 95 gts (forest green, 1 of 1002 made) - 2.5" Off road H-pipe; 2.5" Blowmaster catback with 3" tailpipes; K&N air farter; Cobra front bumper Rice Haters club member #29 Stereo - 2/1000watt 12" MTX subs; Kenwood 1000watt amp; Pioneer 4/ 50watt deck

05-26-2002, 10:51 PM	#6
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	My suggestion is not on an everyday street driven car. In my opinion, they really do not make that much noticeable difference in power except for in the upper rpm range. Just my .02 worth. __________________ The sig says it all.

05-27-2002, 12:01 AM	#7
89-5oh Registered Member Join Date: May 2002 Location: avon lake, ohio Posts: 8	pulleys? why is it that everyone gets pulleys if they cause the alternater to go? I don't want to cause damage to my car, but I have heard that they are an advantage to have. Do you suggest that I not get them? __________________ 89 lx 5.0, ram air w/ K&N filter, 1 5/8 in bbk shorty headers, 2 1/5 in dynomax exhaust (soon to be flowmaster), pony wheels.

05-27-2002, 12:39 AM	#8
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	I still have the pullies on mine, just not the alternator one. They also sell a pulley set that is big stereo friendly! __________________ *Joe!* 1988 GT, 13.58@101mph Check out my listing! Click here! Or my website:www.joe4speed.com

05-27-2002, 03:54 PM	#9
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	I know a lot of people in my area who get them just to say that they have 'em. Also to say that they modified their stang. Every one of them has had to buy a new alternator. On a bone stock car, they do not make that much difference. Whey they make power is when you are turning higher rpms and have 15 other mods to go along with it. If you are hell bent on getting a set of pulleys get the stereo friendly set like JL1314 mentioned. I know $80 sounds like a cheap mod, but it will cost you in the long run. That is on a daily street driven car. __________________ The sig says it all.

05-27-2002, 08:21 PM	#10
MattwantsSpeed Registered Member Join Date: Apr 2002 Location: Lakeland, Fl Posts: 224	Some please remind me......there is the alternator pulley, crnk pulley and water pump (??) pulley??? So what I read is that it's recommended to get just the WP and crank pulley? What if u use the alt. pulley with a 130amp alt.? __________________ 89 LX Hatch 5.0 5spd, alot of miles, terrible 2.73's, mac cai, pullies, Tri-Ax, 16* timing, elect fan, 3G alt Best to date: 14.331@97.46mph with 14*/stock fan/short belt and a 2.222 60' in 90 degree weather Waiting to put on Off road H and 1 5/8 headers Rice Hater's Club #36

05-28-2002, 02:30 AM	#12
Coupe5oh Registered Member Join Date: Nov 2001 Location: SanAntonio, Tx Posts: 734	Yea i just have asp crank pulley, w/ steeda water pump pully, stock alt, no problems with an autocrap 60 amp alternator, like bad89 says, i get a little dim with my a/c, electric fan, ect...eventually im gonna order a 100 amp jegs alt. __________________ Police package 5spd 90 Lx, Stock original motor, 3.27grs, BM fan, fms 10.5 clutch, D&D quadrant, and adjuster, ADS chip, 180 stat, mac cai, mac h-pipe, mac subframe connectors, ASP crank pulley, ripper shifter, 26x10.5 M/T sport pros welds. 246 hp according to analyzer Race weight: 3,120 E.t-13.57 with 26x10.50's e.t. streets. 1.88 60' mph- 99.92 mph

05-28-2002, 06:46 AM	#13
1989GT Registered Member Join Date: Apr 1999 Location: Cincinnati,OH Posts: 1,511	Yeah I run the ASP crank and water pump pulleys, haven't had any problems. I'd say they're worth a .1 or two and 1-2 MPH so yeah I think they're worth it. Just my $.02. __________________ 89GT,Pro-Bullet 306, H/C/I and a bunch of other stuff. Sold 00GT, Vortech S-Trim, Steeda Boost Pipe, C&L intake, Mac off-road H-pipe, Flowmasters, B&M Ripper shifter, Eibach Sportline springs, Koni Struts/shocks, MM full length subframe connectors, Cobra brakes, 3.73's. My Car Domain Page

05-28-2002, 08:21 AM	#14
jrgoffin Registered Member Join Date: May 2002 Location: The Midwest Posts: 79	Yeah, for drag racing, you might get a tenth or two at WOT, but for the street, they are a waste. As everyone agrees, your battery will not charge at idle (which eventually trashes your battery) and the lights will dim, etc. Also, the water pump now turns slower - for a car in traffic, this means it will run hotter. You won't notice any real improvement in every day driving!

05-28-2002, 08:28 AM	#15
UglyFast88 Registered Member Join Date: Apr 2002 Location: Fordland Posts: 117	Hey- not knowing crap about pullies and their effect on alternators, thinking back, my car already had pullies on it when I bought it. However, it also had a new alternator. My lights are dim until the RPM's get above 1250, and are relatively sensitive to the throttle. Is this because of the pullies? I've already replaced the battery, thinking it was weak but it wasn't bad, anyway. __________________ '88 Speed Density LX 1998 Explorer motor 1.7 Roller Rockers GT-40 lower ported & polished Cobra upper intake MAC CAI Aluminum Pullies FRPP P-Shortys Cop car cam (to insult) Competition Engineering F/R adjustables Flowmasters New black carpet and... '84 Racin' Tempo seats! Cars' best run in 2002 with stock 150,000 mile 302 with pullies, exhaust and roller rockers only... 13.27 at 101.5 mph

05-28-2002, 08:34 AM	#16
jrgoffin Registered Member Join Date: May 2002 Location: The Midwest Posts: 79	The alternator ALSO turns slower which means it won't charge the battery until the RPM's increase, usually above 1200-1500. __________________ '90 LX Too many mods... Rear-Disc tech

05-28-2002, 01:14 PM	#17
mysweetlx Registered Member Join Date: Apr 2002 Location: New York Posts: 248	I've got the March pulley set......and I can't stand the dimming lights at idle and not beig able to start te car after 3 days of non-use. I'm thinking about throwing the stoc pulleys back in, but I was told that getting an Optima battery would help w/ the starting problem. Input? __________________ Damn this thing's fast!

05-28-2002, 02:37 PM	#18
joe4speed He said Member...heh, heh Join Date: Sep 1999 Location: Jupiter, Florida U.S.A. Posts: 3,718	I have an Optima battery and it's great, but even the best batteries will lose charge if the alternator isn't putting out!! (heh heh) __________________ *Joe!* 1988 GT, 13.58@101mph Check out my listing! Click here! Or my website:www.joe4speed.com

05-28-2002, 09:48 PM	#19
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	I have the march pulleys and notice the dim lights and low charge at idle, but I have never had a problem starting the car or had to replace a battery or alternator because of the pulleys. __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

05-29-2002, 01:18 PM	#20
mysweetlx Registered Member Join Date: Apr 2002 Location: New York Posts: 248	Hethj7, even after 3 days of not starting it up??? __________________ Damn this thing's fast!

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