Crank pulley question

[kfellers]

I'm thinking of getting pulleys for my '88GT, I've ben told to get only the crank pulley because of the heat here in Texas and the charge problems many have spoken of. My question is can I buy just the crank pulley from a company such as ASP, BBK, etc.

Also, what are the size differences of all three pulleys, crank, alt, and water pump, as compared to stock.

Lastly, of the 10-15 HP gain that is advertised, does most of that come from the crank pulley change or the other two pulleys?
Thanks in advance.

 

[90mustangGT]

There are usually street sets and race sets. With the street sets, it won't really make that much difference in drivability, but you will feel the difference. Race sets are not designed for idle. I have the ASP kit, but I also have the ASP 3" Race crank pulley, the alt, which is a 160amp 3G unit doesn't even move the voltage gauge until 1600rpm.

 

[kfellers]

I've heard the ASP set is good stuff. But can I just buy the crank pulley?
And is it worth the $ just buying the crank pulley?

 

[89MustangGX]

I believe I have only seen race crank pullies separate.

 

[ECU5.0]

where are you? ive got underdrives and i wouldnt mind getting rid of mine. its a daily driver and i hate seeing my alt. gauge down around 12 or lower with the wipers on and lights on and vents on at idle. i dont have any problem with charging because as soon as i hit the gas it jumps to normal charging, but im always worried its gonna cut off for some reason

 

[90mustangGT]

I bought my crank pulley separate, but still have the larger street crank pulley. At idle, the belt moved so slow you could read the part number of the belt!!!

 

[NUTCASE]

I baught the asp crank pullie separate from summit. just, what ever you get, make sure you compare the part ### with what is on asp's website to make sure you are getting what you want

I dunno about 10-15hp but you will feel a difference with just a crank pullie

 

[04sleeper]

I've heard the ASP set is good stuff. But can I just buy the crank pulley?
And is it worth the $ just buying the crank pulley?

Yes it is worth it.
I suggest buying the street crank pulley, "4 inch", and getting an overdrive alternator pulley, "1 7/8 inch", and leaving the stock water pump pulley and you will be just fine.
I have had this setup in Texas and Florida with little or no side affects and good power gains.

 

[txgunrunner]

just wondering why you would keep the stock water pump pulley. have some overheated with the underdrive pulley. thanks

 

[Daniel50]

from my experience i had not cooling or charging problems with my mac pulleys. i say put them all on and than see what happens. any problems take them off

 

[NUTCASE]

I have just the crank pullie and I have NEVER had an overheating issue

as far as the alt. pullie, be careful, some of them are so small only certain shops will have a pullie puller small enough to get it on

 

[Curse]

I'm thinking of getting pulleys for my '88GT, I've ben told to get only the crank pulley because of the heat here in Texas and the charge problems many have spoken of. My question is can I buy just the crank pulley from a company such as ASP, BBK, etc.

Also, what are the size differences of all three pulleys, crank, alt, and water pump, as compared to stock.

Lastly, of the 10-15 HP gain that is advertised, does most of that come from the crank pulley change or the other two pulleys?
Thanks in advance.

With my u/ds, I haven't had any problems with the 100+ Texas heat. The charging problems are there though. I did notice a difference, but just hope you don't have to wait in traffic.