Hi,

I have a 1988 Fiat Uno with the 999cc "Fire" engine.

It currently has a 45amp alternator ( i think ).

I would like to either uprate the current one or add an additional one.

Questions are:

Any advice on doing this?
Are there any quick upgrades for the alternator I have?
Is the bottom pulley replacable with a wide belt one?

If I do the additional alternator it will be charging a separate battery system.

Thanks in advance,

Mark

why would you want a second alternator? or upgrade you standard one?

If its because your lights flash to loud music look into somthing called a Power cap.

The Uno 1.o i.e's had 55 amp ones fitted, although they are tough to find and expensive new. Had to find one as the 55A barely copes when i put the spotlights (130w bulbs x 2) and the fan on (Uno Turbo fan).

ok, The reason for needing the uprated alt is to charge several 100amp/hr batteries in the boot of the car.

I've already uprated the alt to bat and alt to earth and bat to earth cables, so no problems there.

Power caps won't charge the batteries and are crap anyways.

I really need around 100amps + from the alternator to keep up with the bursts of current drain from the extra batteries when in use.
They get 400amp bursts of current drain at random cycles.


SuperUno:- interesting point about the i.e's alt, but I really need a bit more than 55amp.

I found a US website that supplies fabricated alt mounts which you then weld to your own custom engine mountings.

But the reason for this post was to find out if anyone has done anything simular and what problems they had and how they solved them.

Recently, Ive found that the bottom pulley is bolted with three bolts to the bottom crank belt pulley, so there is some possiblities there. ( means I dont have to remove the cam belt pulley to fiddle with the charging system ).

Please tell us what the batteries are used for you have me entrigued?
Pete

am i right in thinking the alternator from a diesel has a significantly higher output? maybe that would be an inexpensive way of solving your problem?

Peterg said:

Please tell us what the batteries are used for you have me entrigued?

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airbag suspension?

just get one from a merc, 150A and make a braket for it to fit

jai,

I think u r right as the battery in the diesel model is a little bit bigger and higher rated, so the alt may be also higher rated..Well but i doubt it having 100 amp+ though...........

Ok, I'll pop down to the local car breakers and see if there are any diesel unos!
Could be a possibility for a very quick fix.

The batteries will be running between 6KW and 12KW RMS of Sub Amplifiers.
Currently I'm only using one 3KW RMS Amp which at full wack pulls around 200+ Amps, so the poor little 45amp alt takes quite a time to play catchup...

Try demon tweaks they sell uprated ones (not for Uno's) but could probably be made to fit.
But even then they only go up to 100/110Amp.

At that sort of power you need a generator not an alternator !!!!!

I would say that's definitely into diminishing-returns car audio territory

If you were going for sound quality, I'd have thought you could have managed with 1000W RMS, which is about 75A.

You must be going for sound power level... in which case you need double the power each time to make a 3dB gain (I guess you already know this ) - hope you're not actually sitting in the car with the 3000W RMS let alone 6000W or 12000W...

Also, think of the WEIGHT of all that gear... the Uno will be struggling... 25seconds 0-60mph I bet!

Sorry I'm not being very helpful: so here's my nomination: Alfa Romeo 164 alternator (Bosch), 115A.

-Alex

i have an article somewhere, on the serious sound level guys, one of them took a mk2 golf, stripped out most of the interior filled it with speakers, and batteries, as well as fabricating a custom bracket onto the engine that could take 3 alternators to run the whole deal!!

alexGS said:

Also, think of the WEIGHT of all that gear... the Uno will be struggling... 25seconds 0-60mph I bet!
-Alex

Click to expand...

Yup, it already goes a bit slow! Has around 6 sheets of 1 inch 8x4 birch ply in it.

I've had some success today.

Removed current alternator and sketched up and made a bracket out of 1/4inch ply. Now need someone to make one out of steel.
This is to fit a 120amp ford galaxy alt.