[neutron256]

Originally Posted by AN

Sorry to hear the Seadoo didnt work out ... I had high hopes ...
So what motor / impeller/compressor housing are you going with now ? 5mm shaft or 8mm shaft ?

Having read up on a lot of compressor graphs, a T70 or a T72 compressor wheel with upwards of 92mm outer diameter will give you good boost at 40k rpm.

Please take a look at maps on this page :http://www.nwbombers.com/forums/topi...map-questions/

Notice the wheel specs on the maps. Most turbos selling on ebay had smaller wheels but i did find a few that have the larger wheels. A couple of examples are:

http://www.ebay.com/itm/171230678053...84.m1436.l2649

http://www.ebay.com/itm/130543950292...84.m1436.l2649

http://www.ebay.com/itm/221478464175...84.m1436.l2649

Also, you want to make sure the compressor A/R is as small as possible ... for low flow / low+early boost , these will work best.

These wheels have a shaft diameter or 7.9mm. Will that make it easier to couple a 5mm shaft motor in your opinion ?

I haven't completely given up on the SeaDoo compressor, but I'm stepping back a bit for now while I rethink and research.

For now I'm going small. I want to see if this can work with a small compressor and 12V dump pack. A bare bones system of sorts. T3 compressor with I think a .50 a/r. I already have a slight damaged one that it can use for bench testing.

The motor I order is a TP Power 4040 3D with a 5mm shaft.

4790kv
Max Amps: 350
Max Volts: 12V
Continuous Power: 1650W
Max Power: 4200W

Garrett impeller wheels actually all have a 1/4" shaft. I think the 7.9mm is probably the journal bearing portion of the shaft.