[Supras] Alternator interchangability

[Dan Gyoba]

On 15 Aug 2006 at 17:28, Suprarossa at aol.com wrote:

> Pre-88 alternators (7M-GTE only, I think) were 70 amps, '88 and  up
> were 80 amps, but the JDM 7M-GTE alternators were 100 amps. Is the JDM
>  version interchangable with the USDM ones?

Yes, but check the main ALT fuse in the fuse box behind the battery.  I had a JDM 100A alternator 
in my NA while I was doing more serious car stereo stuff.  I've got an 80A in there now, though.

The voltage regulator is different between the 70A and 80A alternators, but there are some that 
have a third part number regulator as well.  These can be fitted to either an NA or pre '89 turbo 
for an 80A alternator.  (The NA kept the 70A alternator throughout.)  I found that the extra 10A is 
adequate for "casual use" of a good stereo system.