Stock Pulleys

91Stang5.0 · October 10th, 2009, 04:43 PM

Since my under drive pulleys are probably the reason for my cooling issues, since I've changed my thermostat twice and changed the water pump. Does anyone know what the diameters are of the stock pulleys for a 5.0 or where to buy them? I've searched everywhere and cant find any.

flyin ryan · October 11th, 2009, 12:33 AM

you could try switching to a cobra water pump pulley.. they are smaller diameter then stock to flow more out of your water pump. just an idea

91Stang5.0 · October 11th, 2009, 12:44 AM

that's actually a good idea! I totally forgot about those lol! thanks!

flyin ryan · October 11th, 2009, 02:12 PM

I've always just ran an under sized crank pulley... when I was in high school I ran the three piece pulley set and had nothing but issues. Never had a problem with just the crank pulley

Notcho · October 13th, 2009, 01:45 AM

What size are your underdrive pulleys? A previous owner put them on my car. I know the crank pulley is underdrive (its about 4 inches diameter) but I'm not sure about the rest of them. Not sure which are stock and which have been changed.

October 10th, 2009, 04:43 PM	#1
91Stang5.0 Regular 1991 Ford Mustang GT 5.0 Join Date: Sep 2009 Location: San Antonio, TX Posts: 89 iTrader: 0 reviews	Stock Pulleys Since my under drive pulleys are probably the reason for my cooling issues, since I've changed my thermostat twice and changed the water pump. Does anyone know what the diameters are of the stock pulleys for a 5.0 or where to buy them? I've searched everywhere and cant find any.

October 13th, 2009, 01:45 AM	#5
Notcho meh ======== Join Date: Oct 2006 Location: New Braunfels, Tex / Seguin, Tex Posts: 5,184 iTrader: 0 reviews	What size are your underdrive pulleys? A previous owner put them on my car. I know the crank pulley is underdrive (its about 4 inches diameter) but I'm not sure about the rest of them. Not sure which are stock and which have been changed. __________________ '87 2.3 Notch with +4 cylinder mod Ass, Cash, or Grass.. nobody rides for free Black Stang Crew Member #11

October 11th, 2009, 12:33 AM	#2
flyin ryan Banned Join Date: Jun 2008 Posts: 3,387 iTrader: 0 reviews	you could try switching to a cobra water pump pulley.. they are smaller diameter then stock to flow more out of your water pump. just an idea

October 11th, 2009, 12:44 AM	#3
91Stang5.0 Regular 1991 Ford Mustang GT 5.0 Join Date: Sep 2009 Location: San Antonio, TX Posts: 89 iTrader: 0 reviews	that's actually a good idea! I totally forgot about those lol! thanks!

October 11th, 2009, 02:12 PM	#4
flyin ryan Banned Join Date: Jun 2008 Posts: 3,387 iTrader: 0 reviews	I've always just ran an under sized crank pulley... when I was in high school I ran the three piece pulley set and had nothing but issues. Never had a problem with just the crank pulley

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