| [ Total Views: 740 | Total Replies: 15 | Thread Id: 69528 ] |
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 robnjo
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| posted on June 1st, 2008 at 06:37 PM |
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Generator to Alternator change over???
I was thinking this was a straight forward change over, wire wise? Gen has 3 wires and the Alt has 2 ???
any Ideas?
Rob.
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68AutoBug
A.k.a.: Lee Noonan
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 posted on June 1st, 2008 at 06:53 PM |
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The alternator with an internal regulator only has the output terminal and the small terminal for the Generator/alternator light in the speedo
the alternator will not work without the small wire going to the dash lamp.
the alternator is grounded thru the metal around it etc..
make sure you disconnect the old original generator regulator under the rear seat...
I've rewired My car so i cannot give you any wire colors..
the large wire goes from the battery to the alternator..
You can run a new heavy wire to the alternator from the battery...
or just connect the two heavy wires on the regulator together...
the Alternator stand is different to the generator stand...
an alternator will NOT fit onto a generator stand...
[a generator will fit onto an alternator stand]
also check Your fuel pump..
it may be up against the alternator...
which will cause problems...
You can buy ALTERNATOR fuel pumps...
{I use an electric fuel pump]
so there are a few things different... lol
cheers
LEE
http://community.webshots.com/user/vw68autobug
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- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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Joel
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| posted on June 1st, 2008 at 07:15 PM |
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it actually is pretty straight forward
there are diagrams around showing how to do it
but all u need to do is feed the main wire to the battery and the small wire to the idiot light
assuming this is on a 12 volt fat chick easiest way is remove the regulator, the large red wire that went to d+ on the genny to d+ on the reg join
that to the big red/white wire coming off the battery and the old green DF wire coming from the genny conect the it to the warning light termninal on
the new alt and the other end that went on the regulator join it to the blue warning light wire that used to hook to the regulator
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Joel
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| posted on June 1st, 2008 at 07:17 PM |
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found it
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68AutoBug
A.k.a.: Lee Noonan
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| posted on June 1st, 2008 at 07:28 PM |
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he still needs an alternator stand
and maybe a new fuel pump..
and don;'t forget an alternator fan belt..
11.3mm x `912mm
all VW shops should sell them
I know Vintage Vee Dub do..
LEE
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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ctefeh
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| posted on June 1st, 2008 at 11:21 PM |
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Everything you didn't want to know :
http://forums.aussieveedubbers.com/viewtopic.php?tid=50478&page=1#pid470541
HTH
Ctefeh
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donn
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| posted on June 2nd, 2008 at 10:29 PM |
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OK, I've read all of the above but one thing isn't real clear to me, why do it, obviously alternators have some advantage over generators otherwise
why did all vehicle manufacturers chang over about a gazillion years ago, but what is the advantage and is it worth going to all the trouble for
whatever advantage?
I dream of a day when a chicken can cross a road without being asked for it's motive!
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syncropro
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| posted on June 3rd, 2008 at 04:50 PM |
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The main advantages are higher output than the generator, (Gen. about 30amps, Early alternators 55amps, later ones around 90 amps)
and higher output at idle speed.
Also longer life (Some may argue that) There are other minor advantages.
From above post : the alternator will not work without the small wire going to the dash lamp. is not always right, the alternator has
exciter diodes which excite the alternator if warning lamp fails, but usually it has to be revved high momentarily to start charging in that case.
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Joel
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| posted on June 3rd, 2008 at 07:10 PM |
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alternators are just more efficent
they charge all the time at a consistant voltage and higher output
not like gennys which quiet often dont charge enough at idle
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robnjo
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| posted on June 4th, 2008 at 02:47 PM |
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thanks guys, I thought my gen had 3 wires but its only got 2, same as the alt.
I got the alt stand as well so all is cool.
thanks all for the info
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Pumba
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| posted on June 5th, 2008 at 04:38 PM |
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I have just fitted a alternator to my 1600 and have the problem of the carby linkage rubbing the alternator,after a quick measure have found out the
inlet manifold from a L BUG with a factory alternator is 20mm offset away from the alternator where the carby bolts on if that makes sense.The number
on a standard manifold ends in AF but the number on the LBUG end in N so this could be a way around the problem.Im looking at going back to a 32pict
carby with the offset spacer to see if that works also cheers shane.
69 Beetle
66 Beetle
56 Beetle
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Joel
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| posted on June 5th, 2008 at 05:14 PM |
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dont know who told u bout the offset but its a load of baloney
the only difference in 1600 twin port manifolds is 73 on has larger diameter preheater pipes and 76 has twin hotspot duel preheaters
u can make it work tho ive done it a few times
bend the linkage towards the carb and grind abit off the alternator housing
volkswagen got around it by when alternators started they used a different linkage that was flipped
like this one
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Pumba
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| posted on June 5th, 2008 at 07:31 PM |
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So i just get a carby from a beetle that has the factory fitted altenator???
69 Beetle
66 Beetle
56 Beetle
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robnjo
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| posted on June 7th, 2008 at 05:20 PM |
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So what year did alternators start in Beetles? ... and what years can they go in?
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Joel
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| posted on June 7th, 2008 at 09:40 PM |
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74-76 bugs had alternators
all replacement carbs have alternator style accel pump linkages on them now but the old bend and grind method i mentioned above has worked fine for
plenty of ppl
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robnjo
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| posted on June 10th, 2008 at 08:37 AM |
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thank guy for all the info, very helpfull.
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