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View Full Version : Bigger Alternator pulley



wickedcobra
03-08-08, 04:00 PM
I replaced the alternator because it was bad, I put a larger pulley on the alt as well to slow it down to extend the life of the alt. While driving it out to the track the car felt slower, Im guessing I am loosing some boost, do I need to retune and put a smaller blower pulley? Any input?

ThePunisher95
03-08-08, 05:21 PM
is your voltage still the same?

wickedcobra
03-08-08, 05:23 PM
I assume so, the battery light went out so the old alt was bad. car just feels slower

93mustank
03-08-08, 05:43 PM
Its warmer out?

wickedcobra
03-08-08, 06:03 PM
My thoughts behind it are....The alt pulley is bigger, needed a larger belt. The belt now travels longer to go around therefor spinning the SC slower.

I know its hotter out but I drove it at night and it was noticably slower.

Lucafu1
03-08-08, 09:10 PM
the alt pulley wont affect your boost. the belt still turns the s/c the same way. ylu shouldnt feel any difference. maybe its because you have a wimpy cobra t56 in there =p

wickedcobra
03-08-08, 10:04 PM
Maybe I need to hurry and get I super strong Viper T56. Can the belt be too tight?

Lucafu1
03-09-08, 09:14 AM
Maybe I need to hurry and get I super strong Viper T56. Can the belt be too tight?

yes it can be to tight. this is a problem i ran into before. also why i dumped my aux idler.

Blownsvt
03-10-08, 06:06 PM
simple answer go turbo and loose the belt all together

About2Bite
03-13-08, 06:21 PM
The alternator pulley has nothing to do with the amount of boost you are seeing, or the rate at which the belt is turning.

You could be experiencing belt slip, which I doubt unless you went with a bigger belt that is more loose.

You could be seeing less boost since it is warmer outside.

Did you run the car at the track? Did it run slower??

Josh

wickedcobra
03-13-08, 07:56 PM
I actually ran faster, but Im hoping it was because I am learning how to drive...Mega Bite Jr LCA FTW...!

About2Bite
03-14-08, 02:03 AM
Well in that case it is more than likely a mental thing lol

Congrats on the quicker times :pinkthumb: