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Old 12-27-2009, 12:30 PM   #1
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underdrive pulley

is the 15hp maybe even 10(thats a guess- i dont really know how much hp it gives-lmk) from an aluminum underdrive pulley really worth the $250? heres what i was looking at.

Mustang ASP Underdrive Pulleys & Belt Package =
ASP Underdrive Pulley/Harmonic Balancer & Belt Package for 01-04 V6
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Old 12-27-2009, 12:46 PM   #2
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Re: underdrive pulley

andwill someone tell me what a turbonator is...that goes in your CAI. i mean i know what it is but does it actually do anything? seems like it would do....nothing....
plus i never see a place where u can get one. idkkk
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Old 12-27-2009, 03:31 PM   #3
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Re: underdrive pulley

If you go back and read it again, it says "Gain up to 10 HP & 10 FT/LB of torque" make sure you note how it says (UP TO) which basically means if you have some other engine parts and modifications with the pulley and a tune you might be able to pull 10hp from it. so basically no, you really wont get 10, especially in a V6.

out of curiosity, does anyone know if this will work for an 00 V6?
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Old 12-27-2009, 05:47 PM   #4
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Re: underdrive pulley

A turbonater is said to make the air coming in like spin or something like that but it actually doesn't. It clogs up the intake and makes you lose horsepower. And you can get underdrive pulleys for alot less than that go to Summit Racing - High Performance Car and Truck Parts l 800-230-3030 and look for summit brand
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Old 12-27-2009, 07:30 PM   #5
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Re: underdrive pulley

i have other parts ad a tune but. still not worth it
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Old 12-27-2009, 07:39 PM   #6
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Re: underdrive pulley

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i have other parts ad a tune but. still not worth it
if you have the money to spend, and dont have something else you are saving for, sure. Go for it. You'll get some power, but dont expect a lot. If you do get it, dont forget to retune.
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Old 12-27-2009, 07:43 PM   #7
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Re: underdrive pulley

ive got the money but eh. i want a cool *** hood.
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Old 12-27-2009, 07:48 PM   #8
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Re: underdrive pulley

steeda has one for $225.

hey upton7, i looked through that site, but couldnt find one for v6 mustangs. maybe i just missed it.
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Old 12-27-2009, 07:50 PM   #9
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Re: underdrive pulley

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steeda has one for $225.

hey upton7, i looked through that site, but couldnt find one for v6 mustangs. maybe i just missed it.
couldnt find one either
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Old 12-28-2009, 02:03 AM   #10
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Re: underdrive pulley

I found one when i was shopping for my car but i got a v8 my bad but you can surely find some for cheaper than 250.
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Old 12-28-2009, 01:56 PM   #11
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Re: underdrive pulley

If you don't have a huge audio system and don't plan on supercharging in the future, you might as well get a udp. You'll gain a few hp's and tq, and the tune will make it more effective along with the other bolt ons.

Turbonators are about as useful as a screen door on a submarine...so, don't even consider it
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Old 12-28-2009, 04:19 PM   #12
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Re: underdrive pulley

hey sonicpony, why would you not want an udp if you have a huge sound system or a supercharge?
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Old 12-28-2009, 04:21 PM   #13
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Re: underdrive pulley

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hey sonicpony, why would you not want an udp if you have a huge sound system or a supercharge?
id like to know as well. 2 10" subs in the back
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Old 12-28-2009, 06:45 PM   #14
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Re: underdrive pulley

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Originally Posted by blue-saleen View Post
hey sonicpony, why would you not want an udp if you have a huge sound system or a supercharge?
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Originally Posted by blackonblack View Post
id like to know as well. 2 10" subs in the back
The smaller pulley will slow the charge of the accessories running off that pulley. Some people with larger systems (1400 rms amps and 2 12" subs) had some issues at idle. The idle speed when the v6 is warmed up is 700-800 RPM. The ASP 25% UDP allows the alternator to provide a full charge when the engine is turning over at 850 RPM. Some people have had issues with this, and others didn't.

The pulley is underdriven, they reduce the speed of accessories relative to the crankshaft speed, which in turn reduces the parasitic drag on the engine causing more hp and tq. You don't want your supercharger (or any belt driven power adder) to be underdriven. Since the supercharger is belt driven, you want the larger stock pulley.
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Old 12-29-2009, 04:34 AM   #15
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Re: underdrive pulley

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Originally Posted by sonicpony03 View Post
The smaller pulley will slow the charge of the accessories running off that pulley. Some people with larger systems (1400 rms amps and 2 12" subs) had some issues at idle. The idle speed when the v6 is warmed up is 700-800 RPM. The ASP 25% UDP allows the alternator to provide a full charge when the engine is turning over at 850 RPM. Some people have had issues with this, and others didn't.

The pulley is underdriven, they reduce the speed of accessories relative to the crankshaft speed, which in turn reduces the parasitic drag on the engine causing more hp and tq. You don't want your supercharger (or any belt driven power adder) to be underdriven. Since the supercharger is belt driven, you want the larger stock pulley.
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Old 12-29-2009, 10:46 AM   #16
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Re: underdrive pulley

Quote:
Originally Posted by sonicpony03 View Post
The smaller pulley will slow the charge of the accessories running off that pulley. Some people with larger systems (1400 rms amps and 2 12" subs) had some issues at idle. The idle speed when the v6 is warmed up is 700-800 RPM. The ASP 25% UDP allows the alternator to provide a full charge when the engine is turning over at 850 RPM. Some people have had issues with this, and others didn't.

The pulley is underdriven, they reduce the speed of accessories relative to the crankshaft speed, which in turn reduces the parasitic drag on the engine causing more hp and tq. You don't want your supercharger (or any belt driven power adder) to be underdriven. Since the supercharger is belt driven, you want the larger stock pulley.
Damn Your getting good !!! get the UDP any HP gain is a plus !!! Check with VMP Tuning - Buy Ford SCT & GM Custom Handheld Flash Tuners Performance Economy Towing for UDP and the 01-04 V6 don't require a tune for the pulley


Here's a link to the pulley http://www.vmptuning.com/store/index...id=85&parent=0
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Old 12-29-2009, 11:33 AM   #17
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Re: underdrive pulley

Quote:
Originally Posted by sonicpony03 View Post
The smaller pulley will slow the charge of the accessories running off that pulley. Some people with larger systems (1400 rms amps and 2 12" subs) had some issues at idle. The idle speed when the v6 is warmed up is 700-800 RPM. The ASP 25% UDP allows the alternator to provide a full charge when the engine is turning over at 850 RPM. Some people have had issues with this, and others didn't.

The pulley is underdriven, they reduce the speed of accessories relative to the crankshaft speed, which in turn reduces the parasitic drag on the engine causing more hp and tq. You don't want your supercharger (or any belt driven power adder) to be underdriven. Since the supercharger is belt driven, you want the larger stock pulley.
+1, When driving in traffic at night with the ac on my car charges very low when idling on the brakes. A slight tap of the throttle & the charge goes to normal. All good any other time.
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Old 12-29-2009, 09:46 PM   #18
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Re: underdrive pulley

Make sure you get a pulley that is for your year model car. They changed from an internally balanced setup to an externally balanced setup.

Also, there are ways to keep from losing your alternator charge with u/d pulley and that is to get an overdrive pulley for the alternator so it's running the right voltage. Same trick used by some of us overspinning the stock alternators that are having to put an underdrive pulley on the alternator to keep from blowing it up...

I never saw the gain to be worth the money on my own car, but it's all up to what you want to do. If you decide to go over 15% I would definitely recommend getting a corresponding pulley for your alternator. I wouldn't go over 15% in the first place but that is up to you...
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