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Upgrading/Rebuilding S4 Alt?!

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Old 02-16-09, 10:19 AM
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Upgrading/Rebuilding S4 Alt?!

I know a few ppl on the forum have gotten their alts rebuilt/upgraded to put out more amps. Can anyone tell me where they got this done? I called a few local places and they say they cant do it. I'm willing to ship one of my alts out to get it upgraded.....Thanks
Old 02-16-09, 11:46 AM
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You can upgrade to S5, little bit of simple rewire, this gets you from 70 to 80 amps.

You can upgrade to S6/FD, same little bit of rewire, pulley swap, gets you from 79 to 100 amps.

You can go custom rewind- This makes me uncomfortable, I think there is not much experience on this forum with this proceedure.

You can adapt a different alternator-I used a ford taurus to get a 130 amp alternator. Takes fabrication skills and rewind as above. Search for '130 amp alternator' to find my thread on the subject.

You can use a Ford Tempo 3G rewind, about $180, full 130 amps bolt on with the same rewire as the S5 and S6 alts. This is a great,easy option. Somewhere in my alternator thread is a link to a rewind custom alt company that will do this for you.

Good Luck! It's worth the effort.
Old 02-16-09, 08:13 PM
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just contact these guys.

http://www.qualitypowerauto.com/

they can upgrade anything.
will bolt back into the factory position and the original plug wires dont change.
you just upgrade your B+ cable

i contacted them not long ago

i asked them about my car (i used the same version rx7 alt description that i knew is the same as my Luce alt. cause sure as **** as soon as i said Luce i would have got a HUH?? lol)

question i asked -

what do you have as an upgrade for a gen 2 rx7 (89-91) alternator.

answer -

We can provide a direct replacement alternator that will use the same mounts, use the same belt and connect with your factory wiring harness, just need to upgrade B+. It is a 200 amp alternator that will provide about 110 amp at idle. The cost for this unit is $475.00 (this is US dollars). We would need 5 working days to build this for you. Let us know if you have any other questions. Thanks for the inquiry.
Old 02-16-09, 08:15 PM
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just state yours is a 1986 to 1989 series 4 rx7 alternator and they will be able to give you a quote from there.

they dont take to long to respond either which is a nice change contaction buisnesses over the net..
Old 02-17-09, 06:58 AM
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Originally Posted by sim_rx3
just state yours is a 1986 to 1989 series 4 rx7 alternator and they will be able to give you a quote from there.

they dont take to long to respond either which is a nice change contaction buisnesses over the net..
Thanx for the info. Ive been in contac with another forum member who upgraded his s5 alt to 120amp. said it only him $80! I'm going to check that site u gave me too. Thanx again!
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