HO alt with underdrive pully question

[andrew.brandon]

I have underdrive pullies on my car and am about to put my amp and subs back in. I was going to be adding a capicter this time but with the underdrive pullies the battery undercharges as it is. I am wondering if I can just get a high output alt and solve both problems. will a HO alt charge more that idle that the stock alt?

['94firebirdv6]

yes but with underdrive pullies the whole point is to slow the alt, water pumpp, AC units down to reduce parasitic drag. so a HO alt would be bettre than what you have now but it would still not produce as much power as a HO would with a stock pulley.

[dorkins]

yes, most stock alts dont put there power out at idle... you can easily see this especially in my car... if u rev the engine, you can see the voltage raise and go back down...

HO alts usually put maybe like 120 at idle, for a good 180 amp alt

[andrew.brandon]

as long as it helps keep the voltage up witht he underdrive pullies it is fine with me, even if I haft to get a capiciter for the amp so it will not drop at idle.

[FireFighter]

A capacitor won't help you at all. Just get the HO alt. Most of them do close to their rated power by 1500 rpms. The stock alt puts out a max 105 amps and thats at almost 3000rpm's(3.8l but should be the same with the 3.4)

[andrew.brandon]

where can I buy one fairly cheep? I would like to put it on when I put my headers on if I can

[HeadyFirebird'00]

http://www.summitracing.com/