Stack alternator

[DUAL10S 10+ year member]

How much rms power would a 160 amp stock alternator with big 3 upgrade and deep cycle battery be able to support without light dimming?

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[GreekBrotha8 10+ year member]

Bump cuz I'd like to know also!

 

[goingdef 10+ year member]

I would use an undersized pulley to get as close to full output at idle as you can, but I would say maybe 1200rms with minimal dimming but it really depends how efficient the amp is at whatever ohm load your going to wire it for.

 

[Kangaroux 5,000+ posts]

I would use an undersized pulley to get as close to full output at idle as you can, but I would say maybe 1200rms with minimal dimming but it really depends how efficient the amp is at whatever ohm load your going to wire it for.

Don't switch the pulleys that strains the alt.

 

[goingdef 10+ year member]

Don't switch the pulleys that strains the alt.

yep it sure does but adding a stereo does as well he didn't ask how he could prolong the life of his stock alt.

 

[pro-rabbit 5,000+ posts]

Something most here never discuss is how much your car is using of that alt. The alt is designed to keep up with everything electrical being ran all at once in some harsh conditions.

This means you are not actually going to be able to use all of that 160 or what ever your stock alt actually is.

 

[thevic24 5,000+ posts]

What car and what options do you have...

NAV, power windows....ect..

There will be quite a few things that will affect this...

 

[thevic24 5,000+ posts]

Something most here never discuss is how much your car is using of that alt. The alt is designed to keep up with everything electrical being ran all at once in some harsh conditions.
This means you are not actually going to be able to use all of that 160 or what ever your stock alt actually is.

Just sent you an email!!

(op, sorry for the jack...)//content.invisioncic.com/y282845/emoticons/naughty.gif.94359f346c0f1259df8038d60b41863e.gif

 

[Kangaroux 5,000+ posts]

yep it sure does but adding a stereo does as well he didn't ask how he could prolong the life of his stock alt.

That doesn't make any sense...you're just band aiding a problem that causes even bigger issues. If your voltage is dropping a ton back off on the gain until it is reasonable, don't try fixing it with stuff that will cause more issues in the future

 

[goingdef 10+ year member]

That doesn't make any sense...you're just band aiding a problem that causes even bigger issues. If your voltage is dropping a ton back off on the gain until it is reasonable, don't try fixing it with stuff that will cause more issues in the future

how is getting more amperage out of the alt at idle band aiding a problem? If anything it helps the alt in the long run as voltage will drop on any alt as rpm's come down so you get stuck at a light pulling more amperage then the alt can produce at idle now when you take off the alt has to struggle to bring the now slightly drained battery back up as well as continue to feed the stereo that was draining it in the first place.

 

[thevic24 5,000+ posts]

how is getting more amperage out of the alt at idle band aiding a problem? If anything it helps the alt in the long run as voltage will drop on any alt as rpm's come down so you get stuck at a light pulling more amperage then the alt can produce at idle now when you take off the alt has to struggle to bring the now slightly drained battery back up as well as continue to feed the stereo that was draining it in the first place.

In some cases, it can cause the alt to run hotter at higher RPM's. Some alts will "shut off" at higher RPM's and changing out just the alt pulley could cause this.

 

[goingdef 10+ year member]

In some cases, it can cause the alt to run hotter at higher RPM's. Some alts will "shut off" at higher RPM's and changing out just the alt pulley could cause this.

I've been doing this for a while and haven't ever heard of or experienced this, have you exp this or known someone that has I'm curious what the conditions where and what the make and model of the car.

 

[Kangaroux 5,000+ posts]

how is getting more amperage out of the alt at idle band aiding a problem? If anything it helps the lt in the long run as voltage will drop on any alt as rpm's come down so you get stuck at a light pulling more amperage then the alt can produce at idle now when you take off the alt has to struggle to bring the now slightly drained battery back up as well as continue to feed the stereo that was draining ti in the first place.

Cause by using a smaller pulley the alt will essentially be working at full throttle the entire time...like I said if voltage is a problem turn the gain down or he's gonna be going through alts left and right

 

[thevic24 5,000+ posts]

I've been doing this for a while and haven't ever heard of or experienced this, have you exp this or known someone that has I'm curious what the conditions where and what the make and model of the car.

Lexus IS250 and RX 350....

Both actually have "clutched" alt pulleys...

With the IS, the guest had changed out the factory for a slightly smaller pulley. In this case, anything over 4k rmp, the alt fuse/breaker on the car would blow.

Now I am not saying this is the case with everything....but it is possible.

 

[goingdef 10+ year member]

Cause by using a smaller pulley the alt will essentially be working at full throttle the entire time...like I said if voltage is a problem turn the gain down or he's gonna be going through alts left and right

nope an undersized pulley helps at idle but it's nowhere near full output at idle the real concern are brushes and bearings but the amount of increased wear is minimal.