Mike Holmen

I'm looking at a Turbonetic T70 turbo with a ceramic ball bearings. The mass flow is 84 lb/min and the a/r is 3.5 at 106000rpm's.
I was talking to guy at the local speed shop and they use these turbos for their rice burners. I think that this is the same CFM size as the Holset HX-55 turbo. Does anybody know the good, bad and ugly on the Turbonetic turbo? I was told this turbo spools pretty fast with the ball bearings and max map efficency is 75%. You guys know more about most turbo manufactures so I had to ask the dumb questions. I rather get blasted for saying something stupid than doing something stupid. The web site is http://www.turboneticsinc.com/
Thanks guys.

GO 4LO

You might find some more info on www.supraforums.com or www.rx7forum.com. They're sometimes used in single turbo setups on those motors.
Chris

Mcdowra

Turbonetics makes good stuff the only obvious flaw is the price. Their ball bearing turbos are not traditional ball bearing turbos they only have one ball bearing and the other bearing is a standard bushing bearing. This setup is actually better for durability however it would probably hurt spool up in comparison to a turbo with 2 ball bearings. Just to give you some reference on uncorrected n HX40 flows around 62lbs of air and an ht3b flows around 90lbs of air. However depending on how much air you actually need i would be extremly carefull if your air requirments fall below the surge limit then you will eat the compressor wheel. I have a map for that particular turbo and the surge limit is showing to be around 50lbs of air.

Mike Holmen

I was planning on installing a BD turbo anti-surge valve. This valve is connected to the throttle position sensors and will dump pressure when I release the throttle too fast. I'm hoping that this will prevent the turbo from surging and blowing up. I was also thinking that this turbo is a little big for most of my driving needs but my plan was to buy this turbo and use it as a primary turbo for a twin system. I might buy a turbo with less A/R than that one. The price is pretty much inline with a bomber turbo but with ball bearings. I was planning on waste gating at 50 psi for now, until I get the head o-ringed. I was told that this turbo will support 600hp at the crank, I'm current at about 500hp. I gonna look around for a ball bearing turbo for the secondary turbo with a map that will work well with this turbo. I was also thinking about buying a set of mach 4 injectors down the road. Thanks for your help.