Alternator Swaps

[Jerald9MX-3]

I am currently replacing my waterpump and I was hoping that a larger alternator from another engine could solve the Mx-3 1.6L DOHC wimpy electrical flow. By the time you have a decent sound system, just using the brakes will dull any lights. I am open for any ideas...

[Marlon]

you can use the v6 alt but thers so mods
search theres someone who did it already

[maldo]

You need to swap pulleys and make a new bracket. I used threaded "eye loops" from Home Depot to make an adjustable bracket.

[Jerald9MX-3]

Swap pulleys from the V6??? If I swap the V6 alternator with the one I have...I should put the old pully on the new alt right?

[monty73741]

Swapping 60Amp (RS) for 90Amp (GS) alternator:

I notice a couple of weeks a go, on my friend Ron'sProtege that the engine RPM's would change each time the lights flashed when the emergency flashers were on. The stock charging system was having a hard time keeping up to the electrical requirments of the car. I gave Ron my spare 90Amp alternator to see if that would fix the problem of the engine speed dropping everytime he increased the electrical demand on the car. He had to swap pulleys from the old 60Amp to the 90Amp alternator because the "B" engine use a V-belt where the "K" engine use a serpentine belt. Also the Mounting bolts attach from the opposite side. Once the alternator is mechanically installed the wiring just plugs in. Now with the charging system having more capacity it uses less engine horsepower to operate all the electric systems.

http://members.allstream.net/~dragon64/junk.html

[Custommx3]

RS alternator is 70 amp

[maldo]

The electrical woes can't be blamed on the alternator alone. There is a severe lack of good grounding points in the engine bay and within the cabin. Mazda liked to use bandaid fixes by doubling up wires on performance models instead of providing an overall thicker wire. Provide better grounds where you can, if you can, upgrade your power and ground wires to larger units.

[Jerald9MX-3]

Thanks guys for all the info...wish me luck Im going to try the V6 alternator with the old pully. If I had one more question it would be how did you mount the alternator with the machined holes on the other side???

[Manach]

www.mazdaracer.com

Look there.. this guy own a Protege LX 1.8l DOHC engine..

He have done soooo many thing, that are similar to the MX-3, and wrote them dowm.

[Jerald9MX-3]

Well guys... I ended up buying a brand new 70 amp alternator ($180) and shoving that bad boy in there. Things are running great, and no more dimming.. so maybe its better off without the v6 alty. Thanks for all the advise