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Post by Charlie on Feb 22, 2013 22:14:18 GMT -5
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Post by Dan MacMillan on Feb 23, 2013 5:36:15 GMT -5
In the late 50's people were using the Judson supercharger on their 36hp Beetles. It basically cut 0-10/0-30/0-60 times in half with only a minor loss in fuel mileage {31 down to 29mpg}
Now here is a supercharged Beetle
Just kidding. Have a look at this.
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Post by Charlie on Feb 23, 2013 10:57:35 GMT -5
That's awesome! I did not know that superchargers were once made for vw engines.
I read that they were from the mid 50's threw the mid to late 60's.
I wonder how well one of those superchargers would work on a newer 1500cc or 1600cc engine?
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Post by Gary Hammond on Feb 23, 2013 12:27:05 GMT -5
Hi,  I've got one of those old Judson sliding vane superchargers laying around that I once used on a modified two stroke engine experiment.  The supercharger has to have lube oil injected into it at all times to lubricate the sliding vanes. Wouldn't pass emissions now days.  Gary Hammond,   |
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Post by Gary Hammond on Feb 23, 2013 12:51:11 GMT -5
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Post by Dan MacMillan on Feb 23, 2013 16:57:28 GMT -5
Gary, how did it develop the boost air pressure and volume?
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Post by Gary Hammond on Feb 23, 2013 18:05:54 GMT -5
Hi Dan, Gary, how did it develop the boost air pressure and volume? It had inlet reed valves and outlet reed valves in the crankcase ,which was divided off into two seprate chambers. The effect was two cylinder volumes of air pumped by the bottom of the pistons for each intake event through the intake valve on the top side of the piston.  The bottom end became a two stroke pump supplying a four stroke engine on the top side. I stuffed the cranckcase as much as I could, and was able to achieve a 2 or 3 Lb boost at full throttle at any RPM. Instant boost! The only problem I never solved was separating out the entrained oil. But I think it is possible to do with a redesigned separator. And I think it's also possible to seal the lube system and keep it out of the air stream to start with. Here's a drawing of the setup showing only one cylinder.  Gary Hammond, |
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Post by Dan MacMillan on Feb 23, 2013 18:42:44 GMT -5
Did you have a sand seal on the crank behind the pulley? Without it there is a major air leak.
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Post by Gary Hammond on Feb 23, 2013 18:57:06 GMT -5
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