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Author Topic: Porsche 356 top pulley  (Read 13589 times)
stretch
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« on: November 04, 2014, 22:25:51 pm »

Will a Porsche 356 top pulley fit on a VW (Bosch) alternator?
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stealth67vw
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« Reply #1 on: November 04, 2014, 23:07:17 pm »

Yes. You need all 3 pieces, both halves and the hub.
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John Bates
JB Machining Services
1967 street bug 2020lbs w/driver
12.34 @ 108 mph 1/4
7.76 @ 89mph 1/8
Jeff68
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« Reply #2 on: November 05, 2014, 13:59:08 pm »

What's the best source to get a Porsche 356 top pulley? Who sells the good ones?
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stretch
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« Reply #3 on: November 05, 2014, 14:19:00 pm »

Yes. You need all 3 pieces, both halves and the hub.

Thanks for the info.   Smiley
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Donny B.
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« Reply #4 on: November 05, 2014, 14:52:08 pm »

You can try Stoddard, but they are pricey...

http://www.stoddard.com/catalogsearch/result/?q=generator+pulley
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Don Bulitta
Wolfsburg Registry
Sarge
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« Reply #5 on: November 05, 2014, 15:31:50 pm »

Don't forget the SHIMS!  Without them (or not enough of them), you'll run the risk of cracking a pulley half.
You should see no more then two threads protruding through the nut when everything is tightened up.  Use
the Porsche nut, too.  I added up the cost... about $95.  An OEM 043 903 109 pulley was past $50 when I
was selling VW parts at the dealer four years ago. Shocked
« Last Edit: November 05, 2014, 15:39:15 pm by Sarge » Logged

DKP III
Zach Gomulka
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« Reply #6 on: November 05, 2014, 15:38:16 pm »

I've seen a few of the repro ones spin the inner half on the hub, I would weld it to the hub like a VW pulley.
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Born in the '80s, stuck in the '70s.
Jos
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« Reply #7 on: November 05, 2014, 17:20:06 pm »

Is there an advantage to the 356 pulley or appearance?
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Zach Gomulka
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« Reply #8 on: November 05, 2014, 18:19:25 pm »

Is there an advantage to the 356 pulley or appearance?

Smaller diameter, spins the fan faster.
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Born in the '80s, stuck in the '70s.
stretch
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« Reply #9 on: November 05, 2014, 18:35:41 pm »

I was going to go to Sierra Madre in Pasadena.

Do Stoddards have a retail location or is it online ordering only?

Again, thanks for all the info guys.  Smiley
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Jos
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« Reply #10 on: November 05, 2014, 18:48:05 pm »

Very cool.(pun intended) is it then possible to run a power pulley and 356 pulley and retain normal fan speeds?
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stretch
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« Reply #11 on: November 05, 2014, 19:19:17 pm »

Very cool.(pun intended) is it then possible to run a power pulley and 356 pulley and retain normal fan speeds?

Yes.    Smiley
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Donny B.
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« Reply #12 on: November 05, 2014, 20:47:17 pm »

Stoddard is in Highland Heights, Ohio.
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Don Bulitta
Wolfsburg Registry
andy198712
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« Reply #13 on: November 06, 2014, 18:36:42 pm »

The thing I never got was people running a power pulley to gain power by not spinning the fan as fast, then speedin it back up?

I looked at one a while ago as my trigger wheel was made from a power pulley an try are pricey for a top pulley.
eBay USA popped some up now and again
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stealth67vw
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« Reply #14 on: November 07, 2014, 01:09:50 am »

I use the 356 pulley during the hot summer months (it gets 110F+ 43C here in Oregon) and install the full size top pulley when it cools off in the fall. It is a lot easier swapping top pulleys rather than bottom pulleys.
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John Bates
JB Machining Services
1967 street bug 2020lbs w/driver
12.34 @ 108 mph 1/4
7.76 @ 89mph 1/8
Brew 66
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« Reply #15 on: November 08, 2014, 15:31:41 pm »

Will they fit on an alternator or just generator? I'm thinking I could use some extra fan speed in the summer in Phoenix!
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stealth67vw
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Posts: 2261



« Reply #16 on: November 08, 2014, 20:07:50 pm »

Yes. I ran the pulley on my Bosch alternator.
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John Bates
JB Machining Services
1967 street bug 2020lbs w/driver
12.34 @ 108 mph 1/4
7.76 @ 89mph 1/8
andy198712
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« Reply #17 on: November 08, 2014, 21:30:27 pm »

I'd be grateful for 20 degree heat this summer in the UK lol
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Jos
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« Reply #18 on: November 08, 2014, 22:28:41 pm »

Andy can you post a pic of this trigger wheel? As well as one of the whole motor? I'd like to see te 356 pulley on it.
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andy198712
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« Reply #19 on: November 09, 2014, 22:41:20 pm »

Andy can you post a pic of this trigger wheel? As well as one of the whole motor? I'd like to see te 356 pulley on it.


I didn't put one on in the end and it's been fine but its only a 1200, running the ignition off megasquirt... Will find you a pic Smiley
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andy198712
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« Reply #20 on: November 09, 2014, 22:48:06 pm »



Can do a motor pic if u fancy
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Jim Ratto
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« Reply #21 on: December 11, 2014, 20:51:42 pm »

What's the best source to get a Porsche 356 top pulley? Who sells the good ones?

We sell OEM Porsche pulley halves, hub, 36mm nut and correct Porsche shims. See link in my sig below.

Jim
« Last Edit: December 12, 2014, 21:47:24 pm by Jim Ratto » Logged
RichardinNZ
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WWW
« Reply #22 on: December 11, 2014, 21:24:06 pm »

Does anyone know whether the 356 Top Pulley is smaller than a 36hp top pulley?  If yes, am I correct in thinking that I could use a standard size lower pulley (which is smaller than a 36hp lower pulley) with this and still turn my fan at about the same speed?  My reason is that I can't find a 36hp size degree pulley and think this could be a way of achieving it without lowering fan speed.

Thanks
Richard
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Richard, Auckland, New Zealand

'58 Bug; NZ assembled
Dual Carb 36hp
Lee.C
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« Reply #23 on: December 15, 2014, 22:39:21 pm »

Useful & interesting thread....
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You either "Get It" or you don't......
stretch
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Posts: 297


« Reply #24 on: December 16, 2014, 10:59:08 am »

That engine looks great Jim.   Smiley

Could you give me the spec on the fan belt please?
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Jim Ratto
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« Reply #25 on: December 16, 2014, 18:20:23 pm »

That engine looks great Jim.   Smiley

Could you give me the spec on the fan belt please?

Thanks- that's an old picture, taken in 2000 or 2001. That was a wretched motor to drive. I hated it, but thanks again.

The belt is a 10x825 made by Continental. I think it took me a few tries to nail down best fit. May not work in everybody's case- so don't go off my word.

Have fun,

Jim
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stretch
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Posts: 297


« Reply #26 on: December 16, 2014, 21:08:18 pm »

Thanks Jim, much appreciated.  Smiley  Gives me a good starting point.

What was the spec of that motor?  Why did you hate it?
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nlvtinman
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« Reply #27 on: December 19, 2014, 00:51:55 am »

As a related question to this topic, I have a stock size Berg Achiever bottom pulley with a 356 generator pulley. A 9.5X905 belt is too large. Anyone know what size belt works with such a set up?
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Zach Gomulka
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« Reply #28 on: December 19, 2014, 01:15:18 am »

There are different diameter Berg pullys... I just go to the parts store and they'll let me swap belts til I find the one that lets me put all 10 shims in.
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Born in the '80s, stuck in the '70s.
danny gabbard
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gabfab


« Reply #29 on: December 19, 2014, 01:59:46 am »

Just a idea, Rap some kind of tape around pulley combo in question , cut it and lay it out and measure. Get ya in the ball park . Or a old belt , to short ? cut it and measure how short it is.
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