A UDP question...

[boat]

I am getting ready to do a front 60k and replace my alternator on my 94 MTX. I am considering doing a 10% UDP for the alternator, and then doing a SHOSource UDP crank pulley.

Now, since the crank pulley is underdriven (I believe at 25%), wouldn't that mean everything else is being underdriven at the same rate? If that is the case, and I add the 10% UDP for the alternator, wouldn't the alternator be under driven at say like 35%?

Does this effect lights dimming or the alternator not being spun fast enough? I know that under driving my accessories prolongs their life, but just some thoughts. Looking for feedback, I searched, but really was unsure of how to search that out exactly.

 

[LOUDSHO92]

Yeah underdrive the alternator too much and you will dim the lights. Where do you plan to get the 10% udp?

 

[Ghost93]

Im "double overdriven" on the crank and alternator, and the lights are dimmer at idle with a raised idle and a 130 amp alternator. It doesn't bother me at all, but with the smaller alternator, it might be too much.

 

[SHOtime2511]

im running stock crank but all the other pullys are UDP.
ive never noticed any issues with dimming lights.

 

[randy'sho]

I have a ud crank pulley and love it! I don't think that you would want to do both crank and alt....your lights will definately dim!