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Wed Nov 17, 2004 10:29 pm

I'm looking for a picture of a super beetle air conditioner crank pulley. I was looking to see if it is the same diameter as the Alternator pulley.

Thu Nov 18, 2004 8:39 am

It is much smaller (approx. 3" diameter) and made of cast iron. Sorry no pic.

Thu Nov 18, 2004 10:28 pm

I thought it was closer to the same size and just looked like a double pulley.

Fri Nov 19, 2004 8:22 am

Some were as Tim says cast iron and had 2 notches that fit into the slots on the stock pulley and some were also just stamped steel without nothces. Both required the longer than stock pulley nut. I have some of each if you want pics, I could take some.

Fri Nov 19, 2004 11:57 am

Anyone know how to pull it off? I wat to remove all traces of my damn A/C

Fri Nov 19, 2004 12:32 pm

TaoDude wrote: Anyone know how to pull it off? I wat to remove all traces of my damn A/C

Remove the pulley nut, then remove the ac pulley, then install and tighten a standard size pulley nut in place of the longer puley nut that was on it.

Fri Nov 19, 2004 3:26 pm

anyone know where I can get a standard pulley nut?

Fri Nov 19, 2004 3:48 pm

Chirco, and Barneys in Az. has them.

Fri Nov 19, 2004 10:25 pm

What is the diameter of the stamped steel ones. Are they about 7"? About the same size as a stock steel pulley?

Sat Nov 20, 2004 7:28 pm

emersonbiggins wrote: What is the diameter of the stamped steel ones. Are they about 7"? About the same size as a stock steel pulley?

No they are much smaller, Like Tim stated in his earlier post about 3 1/2 inches maybe, I can find the ones I have and take pics and measure them, but it may take a day or two.

Taodude, PM me your address and I will send you a standard length pulley nut.

Thu Nov 25, 2004 9:57 am

No, it is slightly smaller than the alt/gen pulley. Approx dia. 5.00 inch

Fri Nov 26, 2004 3:18 pm

txgrafix wrote: No, it is slightly smaller than the alt/gen pulley. Approx dia. 5.00 inch

I just measured a cast iron A/C pulley at 4" and a 12V gen/alt pulley at 4 1/4 to the outside edge.
I'll post the measurement of the stamped steel A/C pulley and pics when I find one laying around in my stuff.

Fri Nov 26, 2004 5:00 pm

The crank pulley is what I wanted to be double 7". I'll probably have to make it.

Fri Nov 26, 2004 8:50 pm

emersonbiggins wrote: The crank pulley is what I wanted to be double 7". I'll probably have to make it.

Stock pulley is like 6 1/4 or 6 1/2?

Sat Nov 27, 2004 8:48 pm

I think 6V is 6 11/16" and 12V is 6 ¾". 7" was just an estimate.

Sat Nov 27, 2004 10:47 pm

What are you going to drive with the extra pulley?

Sun Nov 28, 2004 10:00 pm

I was trying to find a cheap way to test the upsizing of the crankshaft drive pulley for the Judson supercharger on my 67 Beetle. I have a 1641cc motor in it so the pulley needs to be larger to try and get back up to 6psi of boost. I have a formula to determine pulley size needed compared to motor cc.

http://www.vocs.net/images/events/rmmw2002/rmmw_2002_64.jpg

Mon Nov 29, 2004 5:57 am

emersonbiggins wrote: I was trying to find a cheap way to test the upsizing of the crankshaft drive pulley for the Judson supercharger on my 67 Beetle. I have a 1641cc motor in it so the pulley needs to be larger to try and get back up to 6psi of boost. I have a formula to determine pulley size needed compared to motor cc.

http://www.vocs.net/images/events/rmmw2002/rmmw_2002_64.jpg

I'm afraid Emerson if you overdrive the Judson to give you 6psi on a 1641 you're going to run into serious overheating problems. :cry:

Mon Nov 29, 2004 11:41 am

Hi John,
Yea I've heard that. I've been running it on the car for the last couple of years at a lower boost and it's time to find out it's true potential. I run with a Berg temp dipstick so I can monitor it some. For around town I hope to be ok, but I want 6psi or destroy something in the process.
I've looked at your sight and I am registered as the only one from Nebraska. I've never seen anyone offer larger pulleys.

Mon Nov 29, 2004 12:21 pm

Hi Emerson,

Yeah the real problem is not particularly the engine overheating (although it will eventually) but the blower itself. The blower generates heat through 2 different ways...friction and compression.

With the stock size pulleys it's not a problem but spin the blower faster and you multiply those 2 elements. You then run into Thermal Runaway.

This occurs when the equipment continues to generate heat faster than it can be dissipated and the temperature of the blower rises until meltdown.

It doesn't usually get to meltdown as the oiler becomes useless...things get very noisy, you back off and open the decklid to find out what's going on.

The blower will be extremely hot...don't touch it!!