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These are internally regulated units and bolt right onto your z just like a stock alternator. You do not have to modify any mounting brackets to bolt one of these units on your Datsun.  For the externally regulated cars, all you have to do is unplug your voltage regulator and tape off the connection. We recommend removing the regulator from the car completely. All stock Datsuns use an external regulator up through 1977. No diodes to splice in, no wire looms to build, no expensive custom brackets to buy, and no pulley modifications to do. When we say plug'n'play, we mean exactly that. They are just too simple too install. They produce 50+ amps at idle and kick in about 500 rpm. At peak output (which is 2500 rpm) they can produce at least 120 amps constantly and can surge to 140 amps without any problems. To disspell an old wives tail, these alternators WILL NOT cause damage to your older cars wiring. If you wire in power drawing accessories and don't do it correctly, then that can cause damage to your cars wiring. All z's in the 70's and early 80's (and all other models) need these H.O. alts. Not neccessarily because of the higher than stock maximum output, but because of the brown out at idle that all z's have. At idle the stock alternators cannot handle the load if you have even some of your accessories on. In the case of the 240's and 260's they don't need hardly any accessory turned on to get this phenomenon. The stock alts produce between 15 and 20 amps at idle depending on the year, and your car needs between 30 and 45 amps if all your accessories are turned on regardless of the rpm. Brown outs cause premature wear on wiper motors, heater fan motors, stereos and many other parts as well. On many of these cars the wipers and turn signals slow down at idle even without any other accessories turned on. These scenarios are completely wiped out by our H.O. alts. 

No core charge required. In most cases these are brand new units, not rebuilt. There is NO core charge needed. These are a special order only item but it usually only takes an extra 3 or 4 days for us to get them. They are built as needed.

YOU CANNOT USE A STOCK BELT ON THESE ALTERNATORS, THEY WILL NOT LAST. You must use a special application belt. If you have an electric water pump we'll need to know that too. Be sure to let us know the year of your engine, specifically the year or model of the crank pulley. For the correct part number of the belt for our z look in our belt section under H.O. Alternator and choose your model.

!!!!!!!!!!!!!Be advised that we now have a new pulley size on these alternators which should make the belts last longer, and will also give you a little more adjustment out of the adjusting arm. If you bought an alternator from us before November 15, 2009 and you have a 240 z crank pulley on your engine then you will need a different belt than the one that we have listed. If that is the case just give us a call and we can give you the belt number if you lost it. The 280 z and zx belts will still be the same. If you do have the old pulley size and you would like to change to the new improved size then send us an e-mail request or call us to order one. We will be adding the pulley to our online store very soon.

This unit carries a 12 month 12K mile warrantee and come with easy to understand Z-specific installation instructions.

'70-83' Datsun 240/260/280Z & ZX!