[91Stang5.0]

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]

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]

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

 

[flyin ryan]

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]

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.