Thinking about installing a ASP Underdrive Pulley (SFI Approved) 25% Underdrive, should I change the Alternator Pulley too with a ASP too???
I have a small system nothing to crazy a MTX STEALTH SUB BOX W/ 10 & SONY 1000 WATT AMP. stock head unit.

Heads, cam, 90/90 so on, go in on the 30th may.

Or just don't do it?

Thank-you

 

id get an overdrive pulley jsut to be 100% safe. i dont havea system period and when I dog et a pulley im getting the OD for the alt.

 

Ive heard of poor charging with under drive alt. pully's

 

exactly why i reccomend the overdrive alt pulley

 

Or, and forgive me for being an "old guy", you could pull all that stuff out of the car, save the 200 bucks you're going to spend on the pulley, and go just as fast from the weight savings alone.

Flame Suit On...

 

I have heard this one before and I agree, but I'm just not will to grow up just yet. 35 year old man living and 25 year old boys mind. That why I have about $3500.00-$3800.00 dollar parts sitting at the house wait to get installed. But again I do agree with you.

 

don't mess with the alternator pulley.

 

I went with a smaller alt pulley when I installed my crank pulley. I have an auto and an agressive setup and I dont regret it at all.

 

put the overdrive on the alt.

 

If you have a stereo system then you are going to wanna overdrive the alt, its as simple as that

 

I went with the overdrive alt pulley and have absolutely no problems with charging, battery, etc. Change it to be safe, especially with the bigger stereo.

 

thanks guy!!!!

 

everyone seems to be leaning to getting it huh? i have a very basic 1 amp system and i did not get the alt pulley. no issues. but when i am rocking out at a stoplight the battery needle will dip a little lower than if the stereo is off.

 

Hmm,not familiar with this, what is the gains of doing this without the stereo system. I will just be having a gear stall spray set up, lid and muffler too

 

you wont gain any hp from an alt. overdrive. if you do a underdrive crank pulley you will pick up like 5-10hp.

 

He's NOT talking about gaining power with the alt. overdrive pulley. He's questioning charging issues.

 

why would you underdrive the crank pulley and overdrive the alt pulley?

Doesnt that eliminate the power gained from the underdrive crank pulley?

 

I'm doing a U/D pulley only from powerbond.