An S/C Perdicament
09-29-2007, 10:07 PM
#1
An S/C Perdicament
OK, quick question, what is the difference between ball driven S/Cs and gear driven, in other words how do they work? I think I may know, but I really don't understand how either works, and how much better one is over the other. I know the ball drivens were replaced by gear, but would a rebuild ball driven kit still be worth it, such as a Paxton?
06-10-2010, 08:48 PM
#5
Join Date: Jun 2010
Location: KS
Posts: 1
not to bring something back from the dead, but just incase someone is researching for some tech:
BALL driven superchargers exist- the Paxton SN series uses 5 one inch ball bearings in the same manner as an automatic planetary transmission. instead of gear teeth, they rely on friction and slipption by being squeezed in between the races in the case halves and are self contained lubricated by ATF.
They get real hot, but come with a hollow dipstick connected to a pump and tranny cooler, have a 4.44:1 step up ratio so they get on boost quick, and are rebuildable at home. Mine is apart because the previous owner overspun it without a big enough cooler, and smoked the fluid.
The VR4 was the king of these and is good for about 15lbs of boost, 1500cfm in a small package, at 45,000 rpm impeller speed. Mine hit 62k and didn't explode, but there are billet impeller wheels rated at 65,000 which are soon to be back in production.
any SN 92,93,2000, or GSS can be upgraded to a VR4 by switching the impeller, and intake cover. 4 inch intake opening.
VR4 impeller:
brass ball carrier is turned by pulley, which causes the ***** to spin against the outer races, which speeds up the drive spindle in the center of the unit. You can also see the internal oil pump and anti-rattle spring:
one of the outer races is pinned in this aluminum disc:
other case portion with opposing ball drive race pinned in place:
BALL driven superchargers exist- the Paxton SN series uses 5 one inch ball bearings in the same manner as an automatic planetary transmission. instead of gear teeth, they rely on friction and slipption by being squeezed in between the races in the case halves and are self contained lubricated by ATF.
They get real hot, but come with a hollow dipstick connected to a pump and tranny cooler, have a 4.44:1 step up ratio so they get on boost quick, and are rebuildable at home. Mine is apart because the previous owner overspun it without a big enough cooler, and smoked the fluid.
The VR4 was the king of these and is good for about 15lbs of boost, 1500cfm in a small package, at 45,000 rpm impeller speed. Mine hit 62k and didn't explode, but there are billet impeller wheels rated at 65,000 which are soon to be back in production.
any SN 92,93,2000, or GSS can be upgraded to a VR4 by switching the impeller, and intake cover. 4 inch intake opening.
VR4 impeller:
brass ball carrier is turned by pulley, which causes the ***** to spin against the outer races, which speeds up the drive spindle in the center of the unit. You can also see the internal oil pump and anti-rattle spring:
one of the outer races is pinned in this aluminum disc:
other case portion with opposing ball drive race pinned in place:
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