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I Want a 5.25" Crank Pulley

  • Thread starter Thread starter Noobz347
  • Start date Start date Jul 20, 2024
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Noobz347

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#1
  • Jul 20, 2024
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For a 302 Windsor Serpentine drive. Where can I get one?
 

TOOLOW91

If you're the village idiot what's that make me?
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#2
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Did you try asp ?
 

Noobz347

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#3
  • Jul 21, 2024
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Are they even in business anymore? Their website appears to be broke.

Ford - Auto Specialties Performance - Quality Performance Products

What do Underdrive Pulleys do? Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air compressor rob horsepower from the engine. By replacing factory-sized...
www.autospecialties.com
 

TOOLOW91

If you're the village idiot what's that make me?
20+ Year Stangneter
Nov 29, 1999
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#4
  • Jul 21, 2024
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Noobz347 said:
Are they even in business anymore? Their website appears to be broke.

Ford - Auto Specialties Performance - Quality Performance Products

What do Underdrive Pulleys do? Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air compressor rob horsepower from the engine. By replacing factory-sized...
www.autospecialties.com
Click to expand...
Wow I was on there not long ago. Wonder if they are done
 

TOOLOW91

If you're the village idiot what's that make me?
20+ Year Stangneter
Nov 29, 1999
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#5
  • Jul 21, 2024
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Noobz347 said:
For a 302 Windsor Serpentine drive. Where can I get one?
Click to expand...
https://lmr.com/item/LRS-8221D/mustang-50-resto-93-cobra-underdrive-crankshaft-pulley-79-93

Closest you’re going to get I think
 

Noobz347

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  • Jul 21, 2024
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I don't know what they are measuring.

Isn't the OEM crank pulley 4.375 inches?

Small Block Ford Performance Ratio Serpentine Crankshaft Pulley

Performance Ratio Serpentine Crankshaft Pulley for Small Block Ford Engines
marchperformance.com
 

85GTStangGuy

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#7
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I'm seeing 5.791" effective belt diameter for stock crank pulley.

That LMR "Cobra Style" pulley (5.109") provides an 11.78% underdrive.

That March "Performance Ratio" pulley (4.375") would provide a 24.45% underdrive. That's a pretty substantial reduction.
 
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Noobz347

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  • Jul 21, 2024
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85GTStangGuy said:
I'm seeing 5.791" effective belt diameter for stock crank pulley.

That LMR "Cobra Style" pulley (5.109") provides an 11.78% underdrive.

That March "Performance Ratio" pulley (4.375") would provide a 24.45% underdrive. That's a pretty substantial reduction.
Click to expand...

Bleh!

Those are the opposite of what I'm actually looking for.

So... If the stock crank pulley is 5.791 then the one I'm looking for would be 6.949" (+ 20%). I'd call it even at 7

The plan is to overdrive the crank and underdrive everything else so that I have even more 'belt real-estate' for the Kenne Bell.
 

85GTStangGuy

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May 19, 2021
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Noobz347 said:
Are they even in business anymore? Their website appears to be broke.

Ford - Auto Specialties Performance - Quality Performance Products

What do Underdrive Pulleys do? Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air compressor rob horsepower from the engine. By replacing factory-sized...
www.autospecialties.com
Click to expand...

I know you've determined that you are no longer desirous of a smaller diameter crank pulley....

but, for future reference, in case anybody is interested in the ASP crank pulley, LMR sells it....

https://lmr.com/item/ASP-520100/85-93-Mustang-50L-58L-Underdrive-Crank-Pulley-Black-Steel
 
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Noobz347

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#10
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Yeah, I want overdrive crank, not underdrive.
 

General karthief

wonder how much it would cost to ship you a pair
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More squeeze at less RPMs, right?
 

Noobz347

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General karthief said:
More squeeze at less RPMs, right?
Click to expand...

The setup I have now with the stock crank pulley works pretty well but I can tell that it slips on occasion. I'd like to go to a larger crank and blower pulley then I'll just reduce everything else with a set of off-the-shelf underdrive pulleys.
 

TOOLOW91

If you're the village idiot what's that make me?
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#13
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Noobz347 said:
The setup I have now with the stock crank pulley works pretty well but I can tell that it slips on occasion. I'd like to go to a larger crank and blower pulley then I'll just reduce everything else with a set of off-the-shelf underdrive pulleys.
Click to expand...
Exactly , I have a 8 inch crank pulley on mine for my blower
 

Noobz347

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TOOLOW91 said:
Exactly , I have a 8 inch crank pulley on mine for my blower
Click to expand...
Is it for a Vortech?
 

TOOLOW91

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#15
  • Jul 22, 2024
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Noobz347 said:
Is it for a Vortech?
Click to expand...
Yes . So the closest I think you’re going to get to what you’re looking for is a 96 f150 5.8 crank pulley , from what I see that is 6.5 or a hair over 6.5 inch dia
 

Noobz347

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#16
  • Jul 22, 2024
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TOOLOW91 said:
Yes . So the closest I think you’re going to get to what you’re looking for is a 96 f150 5.8 crank pulley , from what I see that is 6.5 or a hair over 6.5 inch dia
Click to expand...
I will look into that. Thanks!
 
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TOOLOW91

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Ford Pulley F2ua 6312 Ca 351w 302 Mustang Bronco F150 SBF for sale online | eBay

Find many great new & used options and get the best deals for Ford Pulley F2ua 6312 Ca 351w 302 Mustang Bronco F150 SBF at the best online prices at eBay! Free shipping for many products!
www.ebay.com
 
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Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
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Jan 4, 1985
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#18
  • Jul 22, 2024
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TOOLOW91 said:

Ford Pulley F2ua 6312 Ca 351w 302 Mustang Bronco F150 SBF for sale online | eBay

Find many great new & used options and get the best deals for Ford Pulley F2ua 6312 Ca 351w 302 Mustang Bronco F150 SBF at the best online prices at eBay! Free shipping for many products!
www.ebay.com
Click to expand...

Mine!

I'll holler back once I get it and get muh peeperz on the alignments.
 
Reactions: General karthief

TOOLOW91

If you're the village idiot what's that make me?
20+ Year Stangneter
Nov 29, 1999
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  • Jul 22, 2024
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Noobz347 said:
Mine!

I'll holler back once I get it and get muh peeperz on the alignments.
Click to expand...
I hope it works out !!!!
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
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#20
  • Jul 27, 2024
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TOOLOW91 said:

Ford Pulley F2ua 6312 Ca 351w 302 Mustang Bronco F150 SBF for sale online | eBay

Find many great new & used options and get the best deals for Ford Pulley F2ua 6312 Ca 351w 302 Mustang Bronco F150 SBF at the best online prices at eBay! Free shipping for many products!
www.ebay.com
Click to expand...

So, I got my pulley. The outside diameter is def larger. I cannot do a side-by-side eyeball or comparison with my shroud and all the accoutrements in the way. So, no pics yet.

I can't verify the belt lineup either.

I can say that it [looks] like should work.

and look!

Ford - Auto Specialties Performance - Quality Performance Products

What do Underdrive Pulleys do? Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air compressor rob horsepower from the engine. By replacing factory-sized...
www.autospecialties.com

Their site is back up.

I'm going to do that math and get as close as I can at turning the alt and WP at OEM speeds. I guess the power steering and A/C are just going to have to hold TF on unless...

I'll have to check on those pulleys from an 87-96 Ford F-150. Might just be another bolt-on affair.


The important question is (after get this all mocked up and see if it even works etc...): I wonder what color I'll paint them.
 
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