TheSamba.com :: View topic - Porsche 912 12V 90 mm generator in a Type 3?

Thu Sep 03, 2015 11:38 am

From this thread:
www.thesamba.com/vw/forum/viewtopic.php?t=502713

Erik G wrote: Could one take a 356 gen, put it on a laithe and mill the front (front of car) end off, then use the type 3 6v end cap? It wouldn't be cheap if you buy all your stuff retail, but I've had good luck getting 356 generators cheap. Keep in mind they are only 25 amp ...
Has anyone tried this? Is it possble to take the "12V parts" from the Porsche generator and put them in the Type 3 6V generator housing?

Thu Sep 03, 2015 2:44 pm

You could use the generators from the industrial type 1 motors, 38 amps! We got them here in Australian on air compressors.

I see no reason why you couldn't adapt one but the long section of thread for the pulley would be at the wrong end.

Thu Sep 03, 2015 7:44 pm

HenrikL wrote: From this thread:
www.thesamba.com/vw/forum/viewtopic.php?t=502713

Erik G wrote: Could one take a 356 gen, put it on a laithe and mill the front (front of car) end off, then use the type 3 6v end cap? It wouldn't be cheap if you buy all your stuff retail, but I've had good luck getting 356 generators cheap. Keep in mind they are only 25 amp ...
Has anyone tried this? Is it possble to take the "12V parts" from the Porsche generator and put them in the Type 3 6V generator housing?

The person to ask would be Erik, as it sounds like he's done it before (using a Porsche generator). Or, you could locate a 12 V fan shroud, and then convert to a regular 12 volt generator, or even go with an alternator of your choice (use either a T-1 VW or a Mitsubishi forklift alt).

Thu Sep 03, 2015 9:20 pm

notchboy wrote: Mike Fisher wrote: jimmynotch had his small 6V generator rebuilt into 12V.

I did as well for the Anthracite notch.

The OG 12v were a service vehicle M Code making them rare as hens teeth. Meant for Police-Fire-Ambulance vehicles. Somewhere, someone took a pic of a 12v gen on a service veh at a show from the 80's. Other than looking over a parts book code, Id of never known.

You can have the 6v one rewound for 12 volts.

Thu Sep 03, 2015 11:49 pm

mackaymanx wrote: You could use the generators from the industrial type 1 motors, 38 amps! We got them here in Australian on air compressors.

I see no reason why you couldn't adapt one but the long section of thread for the pulley would be at the wrong end.
Yes, I've got one of those industrial engine generators as well, but didn't know they had a different output than the 912 version.

Somehow I was hoping someone had tried this operation before. I do not want to destroy rare parts experimenting.

Thu Sep 03, 2015 11:51 pm

Bobnotch wrote: Or, you could locate a 12 V fan shroud, and then convert to a regular 12 volt generator, or even go with an alternator of your choice (use either a T-1 VW or a Mitsubishi forklift alt).
Yes, changing fan shroud would be the obvious thing to do, but I want to keep the modifications to a minimum and everything to look stock.

Thu Sep 03, 2015 11:53 pm

notchboy wrote: You can have the 6v one rewound for 12 volts.
Looked into this option, but it seems that no one does that any more in Sweden. One auto electrics shop said "The guy who knew how to rewound died 20 years ago."..... :)

Fri Sep 04, 2015 5:47 am

Expensive, but here's what you're looking for:

http://www.thesamba.com/vw//classifieds/detail.php?id=1147093

Fri Sep 04, 2015 8:56 am

HenrikL wrote: notchboy wrote: You can have the 6v one rewound for 12 volts.
Looked into this option, but it seems that no one does that any more in Sweden. One auto electrics shop said "The guy who knew how to rewound died 20 years ago."..... :)

iSP West can have one done for you.

Fri Sep 04, 2015 10:02 am

squaretobehip wrote: HenrikL wrote: notchboy wrote: You can have the 6v one rewound for 12 volts.
Looked into this option, but it seems that no one does that any more in Sweden. One auto electrics shop said "The guy who knew how to rewound died 20 years ago."..... :)

iSP West can have one done for you.

Yeah!!!!! =D>

Fri Sep 04, 2015 10:35 am

Bobnotch wrote: HenrikL wrote: From this thread:
www.thesamba.com/vw/forum/viewtopic.php?t=502713

Erik G wrote: Could one take a 356 gen, put it on a laithe and mill the front (front of car) end off, then use the type 3 6v end cap? It wouldn't be cheap if you buy all your stuff retail, but I've had good luck getting 356 generators cheap. Keep in mind they are only 25 amp ...
Has anyone tried this? Is it possble to take the "12V parts" from the Porsche generator and put them in the Type 3 6V generator housing?

The person to ask would be Erik, as it sounds like he's done it before (using a Porsche generator). Or, you could locate a 12 V fan shroud, and then convert to a regular 12 volt generator, or even go with an alternator of your choice (use either a T-1 VW or a Mitsubishi forklift alt).

Just to be clear, I never did it - was just being hypothetical

My 63 I prefer to keep it stock

Mon Sep 07, 2015 12:10 am

gregson1 wrote: Expensive, but here's what you're looking for:

http://www.thesamba.com/vw//classifieds/detail.php?id=1147093

Very nice, but I'm in Sweden and before that baby is on my doorstep it will have cost me about the same as an engine rebuild.

I also have the 912/industrial engine parts and it is tempting to try to use them.

Fri Jun 30, 2017 12:25 am

Someone is now selling the parts for 12V conversion of the 90 mm generator. Type 1 shaft, but I guess that could be cut down to Type 3 length?

http://www.ebay.co.uk/itm/VW-Generator-Dynamo-Rebuild-Kit-12-Volt-Armature-/252942128597

Fri Jun 30, 2017 3:15 pm

Are you still looking to do this change? :lol:

Fri Jun 30, 2017 3:41 pm

notchboy wrote: Are you still looking to do this change? :lol:
It's only 2 years since I started the thread. My projects progress very slow. :D

Fri Jun 30, 2017 6:48 pm

HenrikL wrote: Someone is now selling the parts for 12V conversion of the 90 mm generator. Type 1 shaft, but I guess that could be cut down to Type 3 length?

http://www.ebay.co.uk/itm/VW-Generator-Dynamo-Rebuild-Kit-12-Volt-Armature-/252942128597

The shop that sells this kit will also sell one for a Type 3 - or at least they told me they would when I called them a couple of years ago. Might be worth asking about if you don't want to do any modifications.

Fri Jun 30, 2017 8:13 pm

T1 armature can be cut to fit into t3 generator. I had this done.

Anton

Sat Jul 01, 2017 9:55 am

I did a check on my parts today. The left generator is a Type 1 12V 38A generator. The right is a 1964 6V Type 3 generator.

Note that the threads on the end is shorter on the Type 1 generator. The threads are 16 mm on the Type 3 and 12.5 mm on the Type 1.

This has the consequence that you can only use 4 shims if you want the pulley nut to use all threads on the shaft. Some machining of the pulley or washers may fix this, but for the moment I'm giving up on this solution.

Sat Jul 01, 2017 10:43 am

Keep in mind also, that the Type 3 generator has a hole in the side to allow air from the fan housing to cool the generator. The Type 1 generator does not have that, instead receiving its cooling air through the front end.

How much effect this would have on longevity, I don't know.

Sat Jul 01, 2017 5:18 pm

The cooling hole is easy to put in.