Question: Underdrive Pulleys
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MBWorld Fanatic!
Joined: Mar 2010
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From: San Diego
F-250
Question: Underdrive Pulleys
One of the things on my list is 180mm Pulley upgrade. The kits come with underdrive pulleys for Water Pump, Alt, and Power Steering. Are all of these nessesary?
I do not see anyone that sells JUST the underdrive pullys, and do not know which are *really* required. A lot of used 180mm pulleys come up on the boards, and I am just wondering what else (besides tune and cooling) would be required to intstall, and where to get them.
Thanks!!
I do not see anyone that sells JUST the underdrive pullys, and do not know which are *really* required. A lot of used 180mm pulleys come up on the boards, and I am just wondering what else (besides tune and cooling) would be required to intstall, and where to get them.
Thanks!!
MBWorld Fanatic!
Joined: Oct 2009
Posts: 2,825
Likes: 17
From: Southern California
E55 w/ goods, Z32 Project underway
One of the things on my list is 180mm Pulley upgrade. The kits come with underdrive pulleys for Water Pump, Alt, and Power Steering. Are all of these nessesary?
I do not see anyone that sells JUST the underdrive pullys, and do not know which are *really* required. A lot of used 180mm pulleys come up on the boards, and I am just wondering what else (besides tune and cooling) would be required to intstall, and where to get them.
Thanks!!
I do not see anyone that sells JUST the underdrive pullys, and do not know which are *really* required. A lot of used 180mm pulleys come up on the boards, and I am just wondering what else (besides tune and cooling) would be required to intstall, and where to get them.
Thanks!!
A new crank bolt, belt, WP pulley, and crank pulley is all you need. Optional though recommended-a quality tune.
If you are looking to purchase a used unit, ensure that it is a quality unit that is true and straight. There are many that have wobbles and that is not what you want on the end of the crankshaft that drives an incredibly expensive motor. No such thing as a little wobble, either it does or does not. Sort of like being a little pregnant.
Last edited by pearlpower; May 23, 2010 at 02:24 PM.
Thread Starter
MBWorld Fanatic!
Joined: Mar 2010
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From: San Diego
F-250
OK, now another question... In other circles, the Pulley swap is done on the Super Charger (only), not on the Crank. I read one post on here where someone had a smaller SC pulley. I am curious why this is not the standard. Maybe you just cant get the drive differencial with only the SC; meaning to get the same gains, the pulley would disappear. Are there options for a dual pulley set up, and are there any advantages?
Thread Starter
MBWorld Fanatic!
Joined: Mar 2010
Posts: 1,909
Likes: 4
From: San Diego
F-250
My guess is that the smaller waterpump pulley is a stock pulley on another model. I seached parts, and it looks like a lot of MB's have the same basic design, with 4 bolts. I would guess the waterpump is interchangable on a lot of models (and even if not) - have the same bolt pattern. So the trick would be to determine what the stock application is that provides same bolt patten and width - but smaller in diameter. That would allow people to used the stock (Model XXX) and the larger crank pulley at a bit of a discount. If anyone could confirm, that would be great!
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MBWorld Fanatic!
Joined: Oct 2009
Posts: 2,825
Likes: 17
From: Southern California
E55 w/ goods, Z32 Project underway
OK, now another question... In other circles, the Pulley swap is done on the Super Charger (only), not on the Crank. I read one post on here where someone had a smaller SC pulley. I am curious why this is not the standard. Maybe you just cant get the drive differencial with only the SC; meaning to get the same gains, the pulley would disappear. Are there options for a dual pulley set up, and are there any advantages?
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