High Output At Idle?

[hawaiian5 10+ year member]

ok am i correct?, all i need to do to make sure that my alternator puts out at idle is to change the pully? make it smaller?

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[audiolife 5,000+ posts]

more rpm more power

 

[Jboy2 10+ year member]

i heard that you change it to a smaller pulley..but that makes the alt die faster..

 

[audiolife 5,000+ posts]

i heard that you change it to a smaller pulley..but that makes the alt die faster..

true so does changing the idle....

 

[coolahan 10+ year member]

raise the idle.

 

[audiolife 5,000+ posts]

raise the idle.

then you are increasing the wear on the alt from idle to anytime you step on the gas and also increasing the wear over the entire engine and also eat more gas...

 

[hawaiian5 10+ year member]

so would it be better to just leave the originall pulley on?, or put a smaller one?

 

[audiolife 5,000+ posts]

get an alt that will work with the smaller pully or make sure it works good with the stock one. that is where dealing with a good builder comes in instead of buying from MAX specs........best way also to take advantage of a hi output alt is adding a second battery gives less voltage drop to the rear by the amps and gives you more capacity. when you do get an alt to put out alot of power though at low rpm it will still stress it to where it wont last 100k miles more than likely like a stock alt would or could but the flip side a stock alt would get chewed up faster if the load is large enough.

 

[Thnking 10+ year member]

i heard that you change it to a smaller pulley..but that makes the alt die faster..

Nah, of course it depends on how "small" of a pulley you'll buy, but almost anything you find to increase output 15-20% will be absolutely fine. You just want to make sure that if you have a smaller pulley, you aren't pushing your RPM's constantly very high, say above 6K.