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I have an R33 RB25DET in my 180SX. I don't have the room with the stock radiator support to fit the stock clutch fan, so I'm running 2 spal 12" thermos controlled by a pivot fan temp controller instead.

This is the exact 12" fan I'm running in the car (2 of them) - http://www.spalusa.com/fans/automated/tech...s/2038-2025.pdf

My mechanic has tested these and stated they're drawing 30amps when they turn on.

The power draw from the fans when they switch on drops the voltage from 14volts down to low 12's. Whilst he says it's ok to drive it, it's a bit annoying during night time driving when the fans kick in, as I can feel a jolt in the car. Also the driver in front probably thinks i'm flashing my headlights at them =)

I'd like to look at replacing the alternator and leave my current one as a spare for somewhere down the line. Can anyone who has installed a replacement alternator in there RB25 advise what they used where they got it from? So far I've seen an aftermarket MSD one, but can you get aftermarket "universal" Bosch ones to bolt on? Also, is the stock item rated at 90a?

Edited by silman
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https://www.sau.com.au/forums/topic/174201-aftermarket-alternators/
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