How much HP will I get out of Mac Underdrive Pullys

steedamustang01 · 03-24-2002, 02:37 AM

I'm about to buy MAC Underdrive Pullys and I was wanting to know how much HP I would get after the install?

Hammer · 03-24-2002, 02:59 PM

Probably around 5 rwhp...

steedamustang01 · 03-24-2002, 03:39 PM

What about at the Fly Wheel?

Hammer · 03-24-2002, 04:09 PM

In general,
A stang with a 5 speed manual transmission will suffer about a 15% drivetrain loss before the power gets to the wheels...

so, maybe about 7 hp?

03-25-2002, 09:41 AM

I have a set of the mac power pulleys on my 97 stang gt !! It was a good mod and for the cost not a bad mod ! But the aftermarket people that state this and that about the horses you will gain from there mods are lies , I take what ever they say ( like 15 horse gain ) and cut it in half , so you will see like 5 to 7 rwhp maybe !! The more mods that you do the better everything gets !!!

blue00gt · 03-25-2002, 02:09 PM

If I were you I would go with the Steeda pullies because they have a new balancer built into the crank pully instead of having to try to reuse the stock one.

ForPointSex · 03-27-2002, 08:37 PM

They are the same size as steeda's under drive pulleys. So according to MM&FF, you will get 3 HP, 12 lbs-ft torque.

03-24-2002, 02:37 AM	#1
steedamustang01 Registered Member Join Date: Jan 2002 Location: Florence, KY Posts: 120	How much HP will I get out of Mac Underdrive Pullys I'm about to buy MAC Underdrive Pullys and I was wanting to know how much HP I would get after the install? __________________ MODS: - Painted Side Mirrors, Straight Pipes, K&N Filtercharger, Modified Air Silencer, Steeda Tremex 3650 Short Throw Tri-Ax Shifter, Saleen MOMO Shifter, Custom Painted Interior, Modified Saleen Racecraft Progressive Sport Springs SLAMMED 3 1/2 inches, Saleen S-281 Wing, Saleen chrome wheels 18x9 front and 18x10 rear, Saleen Locking Lugs, 265-35-ZR18 Toyo Proxes T1-S's, White Face Indiglo Gauges, 9007 Silver Star HID Headlights, Personalized Licence Plate " 2L8 I 1 " (To Late I Won), Chrome Bumper Decal inserts, Lowered Windshield Wiper MOD, MAC Offset rack bushings, 5% Limo Window Tint.

03-24-2002, 02:59 PM	#2
Hammer AKA "Dr. Evil" Join Date: Feb 1999 Location: South Fork Ranch Posts: 1,721	Probably around 5 rwhp... __________________ Uncle Sam "What the hell is up with all the gauges? Calling Captain Kirk, your ride awaits... Phasers on stun...."

03-24-2002, 03:39 PM	#3
steedamustang01 Registered Member Join Date: Jan 2002 Location: Florence, KY Posts: 120	What about at the Fly Wheel? __________________ MODS: - Painted Side Mirrors, Straight Pipes, K&N Filtercharger, Modified Air Silencer, Steeda Tremex 3650 Short Throw Tri-Ax Shifter, Saleen MOMO Shifter, Custom Painted Interior, Modified Saleen Racecraft Progressive Sport Springs SLAMMED 3 1/2 inches, Saleen S-281 Wing, Saleen chrome wheels 18x9 front and 18x10 rear, Saleen Locking Lugs, 265-35-ZR18 Toyo Proxes T1-S's, White Face Indiglo Gauges, 9007 Silver Star HID Headlights, Personalized Licence Plate " 2L8 I 1 " (To Late I Won), Chrome Bumper Decal inserts, Lowered Windshield Wiper MOD, MAC Offset rack bushings, 5% Limo Window Tint.

03-24-2002, 04:09 PM	#4
Hammer AKA "Dr. Evil" Join Date: Feb 1999 Location: South Fork Ranch Posts: 1,721	In general, A stang with a 5 speed manual transmission will suffer about a 15% drivetrain loss before the power gets to the wheels... so, maybe about 7 hp? __________________ Uncle Sam "What the hell is up with all the gauges? Calling Captain Kirk, your ride awaits... Phasers on stun...."

03-25-2002, 09:41 AM	#5
southernstang97 Guest Posts: n/a	mac power pulleys I have a set of the mac power pulleys on my 97 stang gt !! It was a good mod and for the cost not a bad mod ! But the aftermarket people that state this and that about the horses you will gain from there mods are lies , I take what ever they say ( like 15 horse gain ) and cut it in half , so you will see like 5 to 7 rwhp maybe !! The more mods that you do the better everything gets !!!

03-25-2002, 02:09 PM	#6
blue00gt Mustang Addict Join Date: Jan 2001 Location: McKinney, TX Posts: 1,294	If I were you I would go with the Steeda pullies because they have a new balancer built into the crank pully instead of having to try to reuse the stock one. __________________ Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s

03-27-2002, 08:37 PM	#7
ForPointSex Registered Member Join Date: Mar 2002 Location: Central NJ Posts: 9	They are the same size as steeda's under drive pulleys. So according to MM&FF, you will get 3 HP, 12 lbs-ft torque. __________________ 2002 GT, 5 sp -K&N drop in -tri ax -Steeda pulleys, Timing adjuster -FRPP 3.73 -SpeedCal -Magnaflow cat-back

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