so basically i need to do a ALT relocation for my car, the only spot where i can stick it would have to be where the pulley is going backwards, so would it still charge if its going backwards? if it wont well since its gotta be rebuilt can dominick like wind the inside backwards?
lol uhmm, i want to add a 2nd alt to my car basically, but the only spot is the alt would have to be bolted up backwards, so instead of the pulley turning clockwise it would be counter clockwise so would it still work?
I would have to say it will produce power in both directions, it starting out as AC then converted to DC. AC travels in both direction and does not need directional windings, BUT there is a cooling fan(internal or external that will only cool in one direction, will become a puller instead of a pusher. Find a different place to put it like in the AC spot. Polo..
you are right polo, the fan is either LH rotation or RH there are some that are multi directional but that isnt likely on your car. you should be able to find a fan that will go the right way. but polo i believe the fan pulls the air forward.
It should pull air from the pulley towards the rear. This is because the rectifyer is in the rear, pulling area past there first would pull hot air from the rectifyer throught the rest of the alt which quite dence causing a greater thermal loss due to saturation/resistance change. Polo..
A point about the "AIR INTAKE," which is seen in photos of the alternators viewed from the rear, above. Clearly the author has written "air intake," and not air exit or air exhaust. The fan at the front of these alternators is an exhaust fan. The fan draws air in through the opening at the back of the alternator, where the air will pass through cooling fins at the rectifier heat sink. And the air will be drawn through the stationary "stator windings," where the air will also have a cooling effect. As usual with moving air through passages, the same fan efficiency will suck more air than the fan could blow through. That's why the fan at the front is an exhaust fan.
Ummm Matt not everything you read is right! I just checked my Bosch 300 A alt which uses dual internal fans and it sucks from the front (pulley end) and blows out the back. There may be alts that would suck through the back but that would be inefficient because the rectifyer is the hottest part on the alt, due to the conversion. Also in a rear driven vehicle where the engine faces front to back, engine cooling fans would be blowing towards the engine and yes the alt totally negating the purpose for the alt fan sucking through the back. BTW I just started my car and checked to be sure and maybe delcos are the way you think, maybe this is why Bosch makes better alts but if I was to design one, would be just like Bosch's ! Polo...
Ok, here is what I found. Alts with external fans actually pull air from the rear, these are the ones with the fan by the pulley, very inneficient design if you ask me. the internal fan alt are the ones with no fan at the pulley and has a lot of holes in the case. Internal fan alts use two fans, the front one pulls air from the front and side blowing over the rotor and windings. The second fan sucks air from the side like the front and blows over the rectifyer and pulls the air from the first fan out the rear, much more efficient. Why do you need to relocate your alt? BTW what engine/year is it? Polo..
that is a 2000 2.5L in a cougar, and because i keep going through alternators, they have a problem with the alts being located on the bottom of the engine gettin all the road and no fresh air and moisture, plus i want two alts hehe
ah ok polo, reason i said that is that because i just got done rebuilding an alt for a 5.7 GM volvo and it pulled from the back to the pulley side this was in a boat though.
and yes i though about how it didnt make since for in a car but after finding that info i posted made me rethink. i did some more research and those are older alts pre 80s it seems and thanks for clearing that up it had me wondering tonight.
ok if your alt is messing up because of not enough air flow or road debri hitting it i had an ideafor mine anyways make a sheild that surronds the alt as big as you can get it and to cover as much as you can get a pvc pipe from front clip to pull in air and have it exit at the shield and have some point of exit for the air to circulate sheild prevents debris and water hitting the alt and the pipe gives the necessary air flow across it just an ideas to try