alemmons

iTrader: (14)

Anyone know what the shaft diameter is on the FD alternator? I am getting an FD alternator to swap into my FC. I won't have a lot of time when I get my alternator so I am hoping to have the hole bored out on my double belt pulley before I get the alternator so it will be ready to go when I get the alternator.

RotaryEvolution

iTrader: (30)

17mm

Howru

iTrader: (25)

Another FD alternator swap question: do you re-use the s4/s5 spacer where it mounts onto the water pump housing, or just put it in and tighten?

misterstyx69

iTrader: (142)

you use the stock spacer Howru..Put it at the back,between the Pump housing and the "rear Ear" of the alternator.

Howru

iTrader: (25)

Got loads of info for wiring, but not about that spacer. Thanks!

Japan2LA

iTrader: (256)

Why not just get the SPECIAL pulley made specifically for this upgrade?

Link:
https://www.rx7club.com/2nd-generation-rx-7-1986-1992-parts-194/brand-new-dual-belt-pulley-fd3s-100amp-alternator-upgrade-860869/

alemmons

iTrader: (14)

I would if I didn't already have the Banzai non-underdrive dual pulley

alemmons

iTrader: (14)

What do you use for a spacer to run the FC pulleys?

Howru

iTrader: (25)

You'll have to cut the spacer off the back of the FD pulley, as much of it as you can.

alemmons

iTrader: (14)

Bummer, I don't have the FD pulley. Got the alternator without it. Any other ideas?

misterstyx69

iTrader: (142)

go to an alternator Rebuilder.They will have the spacer.
Try your Local yellowpages.