Sc14 Supercharger Rebuild  

This is what I have found re. the SC chargers.

The lobes are made from extruded aluminium in the shape required. The outside surface is grit blasted and cut to size then it appears the lobes are re-extruded through a slightly larger mould that applies the teflon (or similar) coating. (sort of like icing a cake all the way around at once).
Spraying a new coating on is not really an option because of the tolerances involved (which run to as close as 0.25mm) and the thickness needs to be about 0.5mm or so, much thicker than most spray coatings. Also the teflon profile doesn't follow the aluminium profile exactly so even if you sprayed the right thickness perfectly, it wouldn't be the proper shape.

Ie, you can't recoat these things.

What about buying new ones? Well Ogura will sell them (with their universal mounting points, not the Toyota style) but you need to order a pallet of chargers as a minimum............


As for bearings, you CANNOT get the front bearings at all, unless you commission Koyo or KYB to manufacture a production run of around 1000 bearings of each type.

You can get the rear bearings, or could, until I bought 2 of the last three in Australia for my rebuild, and have the last being held at the local bearing place pending my discovery of a last one overseas.
If anyone finds a source of rear bearings, let me know, the manufacturer has no plans to do another run in the foreseeable future.

The two rear seals are still readily available, but to replace them (you know they need replacing if your supercharger uses oil) you need to heat the rear bearings to melt the epoxy that holds them in to remove the bearings to access the seals.
Unless you have precise control of the temperature, you risk stuffing the bearings so you really need to replace them anyway.


So, basically, if your supercharger needs front bearings or new lobes, get a new supercharger. If it needs new oil seals or rear bearings, if you can find the rear bearings, then you can extend it's life.


Also, to prolong the superchargers life, keep the supercharger speed below 10,000RPM and the boost below a ratio of 1.8, or 2.0 short term (or 12PSI, and 14.7PSI short term)

How do you tell if the bearings in the SC14's are stuffed? Are they friction type or roller?

Also for anyone who would know, what's the standard boost pressure that the SC14 puts out, and is it safe for an engine with 8.7:1 compression?

So theres NO way to rebuild them>>>??? surely there has to be, what about using different bearings and seals to suit, a 12000rpm bearing would be suffecient (c3) surely.