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#1 |
Registered Member
Join Date: Feb 2004
Location: louisville, kentucky
Posts: 88
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![]() ive been looking at a bunch of stangs and reading there mods list. a lot of them have an under drive pulley. i know where it goes on the engine but what does it do.
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#2 |
Registered Member
Join Date: Feb 2004
Location: Carson, Ca
Posts: 4
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![]() All I know is that they add like 8 to 10 more hp I wanna get some to but my friend told me that it drains tha batt I don't trust him to much though cuz he lies allot but yea its a pretty good mod for like 80 bux for Mac under drive pulleys
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#3 |
Registered Member
Join Date: Aug 1999
Location: New Port Richey, Florida
Posts: 483
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![]() The diamater of the pullies are different. This is why the alternater might not charge fully, it will turn less than with the regular pulley. I had this problem at night with the lights and radio on. A local speed shop changed out the alt pulley and over drived it so it would fully charge. In short they turn your accessories less, which takes power.
Hope that helps
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1969 Mach 1 351C with a c6(for now) Sold 92 Rag Top GT Procharged & intercooled DSS 331 LC Holley Systemax 2 Intake, Edelbrock RPM Heads,E 303 ,blow thru air meter, race bypass, 42 pph injectors,65mm tb,1.7 rr, Mac long tube headers w/off road H pipe, Force 2 catback, TKO,Pro 5.0, K&N, Alum DS,3 core radiator, subframe connectors,3.73`s, Nitto DR`s and a Heavy Foot. |
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#4 |
Registered Member
Join Date: Mar 2004
Location: Arvada, Colorado
Posts: 6
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![]() This might be a little late, but an underdrive pulley does a few things. It increases HP a little, increases gas millage, and reduces wear on your belt driven accessories. Because the pulley slows down the belt, it's recomended that you get a different alternator that can handle the slower belt.
Hope this helps. ![]()
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--- If you can't beat em', blow their ear drums out with bass |
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Thread | Thread Starter | Forum | Replies | Last Post |
Underdrive Pulley Thoughts? | Tincan18 | Windsor Power | 6 | 08-26-2004 11:32 PM |
underdrive pulley question? | stang_guy_95 | Windsor Power | 6 | 04-25-2003 07:38 PM |
Underdrive pulley question? | AntwaanRandleEL | Windsor Power | 20 | 11-20-2002 11:32 AM |
Underdrive pulley install | CaliJ1 | Modular Madness | 2 | 09-26-2001 06:06 PM |
Underdrive performance W/O alt. pulley. | Shotgun28 | Windsor Power | 16 | 02-04-2001 11:24 AM |