Jerald_Belford

Hi Nigel, your post was awesome but I was wondering if you could help me with my specific question.  Below is your post.

Hey guys.

Skyline alternators is something I have a lot to do with because I rebuld/refurbish them as a hobby from home.

I am only interested in rebuilding the Hitachi units. Here is some examples of my rebuilds.

http://www4.wave.co.nz/~lakewood/Skyline/Alt.htm

A bit of info on alternators.

All Jap R31, R32 and R33 Skylines use the Hitachi or Mitsi built alternators.They are all internal cooling fan type. R31 Aussie/NZ market use a Hitachi outside fan type or Bosch Internal fan type.

Physical fittment to the engine block they are all interchangable. Adjuster bracket, belt alignment are all matched. Wiring wise the outside fan Hitachi from Aussie R31's are different. All the others including the Bosch is the same. Some R33 Skylines use a 8mm BAT terminal, the rest have 6mm BAT terminal. Easy to sort.

The earth terminal (5mm) and the main two pin ignition/dash light plug are all the same except for (again) the Hitachi outside fan unit found on the Aussie R31's.

Some have a smaller belt pulley (69mm versus 73mm on other units). If your engine is to do a lot or high rpm work then the larger alt pulley is better as it will help avoid over reving the alternator when its not necessary.

If the alternator has a Hitachi number starting with LR170 it is a 70amp unit. LR180 are 80amp and LR190 are 90amp. The Bosch units found on Aussie R31's RB30's are 110amp.

No alternator should be running at its max amp output during normal operation. If it is it's not spec'd right for the job and will give up the ghost sooner than it should. No alt should be operating at more than 50% its max output rating. If you are going to have lots of high power drawing items running, air con, high wattage headlights, spots, or big sound systems then you are better to go for the 90amp plus units.

I have found that internal parts ARE available for "some" of the units. Don't even consider buying the parts from a sparky or Nissan. I recently priced a Voltage Regulator for a Hitachi built alternator for a RB20DET R32 Skyline. $153 from sparky and ....wait for it..... $675 from Nissan ex Japan. I can't buy parts wholesale as I'm not a register sparky.

However Ebay USA comes to the rescue. Brand new regulator.... $35 US. I recently ordered one and a rectifier and a slip ring to complete two other alts. Buy the number of item the seller has sold (over 18000) and the positive feedback from these sales they are quality parts. He is a surplus parts dealer.

Nigel

Can you tell me what Bosch 110 amp alternator you were talking about.  Would it fit on my bnr32dett?