Quick U/D Pulley Question...need the alt pully?

[91LX_5L]

Do I really need the alternator underdrive pulley? I have a large system and my voltage is allready pretty low. Will it sacrafice much power? Whats the deal with running stock alt pulley?

Thanks!!!

 

[donjohn]

i'd need a second opinion but it looked really similar in size to me

of course the smallest difference could change a lot

 

[wytstang]

I have yet to put my alt pulley on but the ASP alt pulley looks like the same size as stock.:dunno:

 

[super302]

you don't need to use the alt. pulley, it can (and will) cause charging issues when at idle.

 

[94DreamGT]

Use the stock alternator pulley...the underdrive one will most likely cause you nothing but problems, I know it did for me.

 

[donjohn]

well in the instructions for the march u/d pullies, it said it might cause problems, and if it did all you had to do was add a lock washer because the alternator shaft is longer on some cars and i guess slips if it is- causing charging problems. i didn't use the lock washer though

 

[91LX_5L]

ok so there is no power loss diffrence?

 

[mytight95]

if you have the billet pullies i will by that pulley from you........


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