bigger alternator

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mx5rally
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bigger alternator

Postby mx5rally » Wed Mar 07, 2007 1:39 pm

Has anybody out there fitted a larger amp alternator to their BP 1800 engine, around 100amps and if so what is it off and what modifications were required, thanx Dave
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AJ
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Postby AJ » Wed Mar 07, 2007 4:38 pm

you could probably enquire at an auto sparky about beefing up your existing alternator 8)
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Fuzzlet
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Postby Fuzzlet » Thu Mar 08, 2007 8:45 pm

This is something I need to look into...with the stereo and air con on, the car can't idle lol....having said that I probably have an overkill stereo for an MX-5 :P
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AJ
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Postby AJ » Thu Mar 08, 2007 8:49 pm

130 amp landcruiser alternator for you fuzzy one..........lol :lol:
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Alex
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Postby Alex » Thu Mar 08, 2007 9:54 pm

wouldn't this just mean you have less engine power because the alternater is using up more???
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AJ
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Postby AJ » Fri Mar 09, 2007 7:55 am

no
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mx5rally
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bigger alternator

Postby mx5rally » Sun Mar 11, 2007 9:05 am

I suppose I should explain why I need more amps from my alternator - I run 4 lightforce spotlights on the fron of my car wich consumes quite a bit of power from the battery, I need a more powerfull alternator to keep charging the battery whilst the lights are on. ps. I do not have air con or power steer, thanx dave
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hot rod
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Re: bigger alternator

Postby hot rod » Wed Mar 14, 2007 1:52 pm

mx5rally wrote:Has anybody out there fitted a larger amp alternator to their BP 1800 engine, around 100amps and if so what is it off and what modifications were required, thanx Dave


I agree it's easier just to rebuild your existing one. In the past on previous cars I have used Commodore internals as they are cheap and are about 120amps from memory. Any decent auto elect should be able to do this.

What is the MX one rated to btw?
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