Underdrive Pulleys - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 06-26-2013, 11:26 PM   #1
Registered Member
Regular
 
XSlashDashX's Avatar
 
Join Date: Nov 2011
Location: Silsbee
Region: Texas
Posts: 1,224
Underdrive Pulleys

Is it worth getting? Was looking into the Steeda Pulleys on AM. How much mpg would I gain?
XSlashDashX is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-27-2013, 12:03 AM   #2
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: JB MDL
Region: New Jersey
Posts: 16,604
3-5hp at the wheels... I had the BBK aluminums on my 5.0, they were very nice. I recommend not installing the alternator pulley. Its worth 1hp at most and the potential for charging issues makes it really not worth it.
__________________
2000 Mustang GT Steeda #0048

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Old 06-27-2013, 12:07 AM   #3
Registered Member
Regular
 
XSlashDashX's Avatar
 
Join Date: Nov 2011
Location: Silsbee
Region: Texas
Posts: 1,224
What's wrong with the alt pulley?
XSlashDashX is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-27-2013, 12:42 AM   #4
Registered Member
Regular
 
Join Date: Mar 2013
Location: Salinas
Region: California
Posts: 7,417
Quote:
Originally Posted by XSlashDashX View Post
What's wrong with the alt pulley?
There can be issues with the alternator charging at low RPM. For what it's worth, Ford used uderdrive pulleys on the Bullitt. All of the accessories are underdriven but they left the crank pulley the original diameter.
straybullitt is offline   Reply With Quote
Old 06-27-2013, 05:14 AM   #5
Registered Member
Regular
 
cliffyk's Avatar
 
Join Date: Oct 2012
Region: Florida
Posts: 1,001
I have the Steeda UDPs on my '03 GT, including the generator pulley, and have never had any charging problems. As to increase in fuel economy it will be minimal; 0.5 mpg at very best.

The most noticeable difference will manifest itself on hard acceleration in the lower gears, especially over 4000 rpm. If you are not the sort to do that you might want to reconsider spending time and money on UDPs...
__________________
SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
cliffyk is offline   Reply With Quote
Old 06-27-2013, 10:57 AM   #6
Registered Member
Regular
 
BigB227's Avatar
 
Join Date: Aug 2011
Location: West Palm Beach
Region: Florida
Posts: 1,120
Quote:
Originally Posted by cliffyk View Post
I have the Steeda UDPs on my '03 GT, including the generator pulley, and have never had any charging problems. As to increase in fuel economy it will be minimal; 0.5 mpg at very best.

The most noticeable difference will manifest itself on hard acceleration in the lower gears, especially over 4000 rpm. If you are not the sort to do that you might want to reconsider spending time and money on UDPs...
+1 this is one of those mods that if you dot spend quite a bit of time in the upper rpms you'll wonder if it was worth it. Like an aluminum driveshaft, only makes a big difference in high rpms for the rotational mass
BigB227 is offline   Reply With Quote
Old 06-30-2013, 06:37 PM   #7
Registered Member
Regular
 
Perricanfalcon's Avatar
 
Join Date: Jul 2012
Region: Pennsylvania
Posts: 22
I had the Steeda UDPs on my 03 GT and had charging issues which left me stranded twice and after the second time the next day switched back over to the stock pulleys.
Perricanfalcon is offline   Reply With Quote
Old 07-01-2013, 12:03 PM   #8
Registered Member
Regular
 
Nitrous02gt's Avatar
 
Join Date: Feb 2013
Location: Sugar Land
Region: Texas
Posts: 124
Quote:
Originally Posted by Perricanfalcon View Post
I had the Steeda UDPs on my 03 GT and had charging issues which left me stranded twice and after the second time the next day switched back over to the stock pulleys.
Do u have a system in your car?
Nitrous02gt is offline   Reply With Quote
Old 07-01-2013, 12:20 PM   #9
Staff
Regular
Staff
 
scottydsntknow's Avatar
 
Join Date: Apr 2013
Location: JB MDL
Region: New Jersey
Posts: 16,604
I had a "system" in my 95 Cobra. Kicker Amp, two 12s, aftermarket headunit and Pioneer speakers. Not so much a system as a decent stereo setup. I had 0 charging issues with the BBKs and the stock alt pulley. Even with the headlights on and the AC on at idle at night when the bass hit it was totally fine. No capacitor or anything. If there are charging issues that severe in a newer Mustang it might be the charging system is already weak and the pullies are just helping it along in its failure .
__________________
2000 Mustang GT Steeda #0048

Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.
scottydsntknow is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1996-2004 Mustang GT

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


» Like Us On Facebook



02:04 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.