4K (Ke70) Alternator On 3K (Ke20)

[rollas-r-us]

Hey guys, just in the middle of putting my new engine in my freshly painted engine bay. I have previously noticed that the stock 3k alternator struggles to power and keep charged a sub and amp. And after a quick search I couldn't find anything on differences and modifications needed to install a later model 4k (ke70) alternator..

 

Any help would be greatly appreciated.

 

Thanks

 

Tom

[Evan G]

put them next to eachother and see if the mounts are the same?

[ke30 driver]

may have to change mounting brackets and have to change wiring.

[SLO-030]

Upper bracket is also different. requires the KE70 one to be used with the KE70 alty

[philbey]

Lower mount bracket is the same.

 

The top bracket, the sliding one, is different and has a slight offset compared to the early one. You can't easily adapt the early one to suit.

 

A

The biggest change is in the electrics, early alternators have an external regulator, later models are internal. It's a very simple upgrade though, you will end up with less wiring to worry about and a cleaner engine bay.

 

Now just a punt, I don't think you will actually get extra grunt from the later one; I reckon they are both 25 A...?

[dbr11k]

have a crack at doing the 'commodore' alternator conversion if its Bosch.. I did it my self and i'm hopeless with electrics. ask Evan about it I'm sure he can help ya out with somethin :y:

[rollas-r-us]

Thanks very much, Ill have a sus into the commodore dbr11k, Ill probably just take it to an auto electrician.

 

Cheers Tom