Gtx3076r?

[911TT33]

Has anyone here tried the new generation GTX3076R ball bearing turbo?

Apparently it has the spool characteristics of the GT30R but the flow of the GT35R

Would be a very nice quick spooling street turbo with great top end too

[YODA MASTER]

http://www.google.fr/url?sa=t&rct=j&q=perrin%20has%20new%20toys...%20gtx%20results%20i nside!&source=web&cd=1&ved=0CCMQFjAA&url=http%3A%2F%2Fforums.nasioc.com%2Fforums%2Fshow thread.php%3Ft%3D2110277%26page%3D4&ei=hMSjTtiHLJSU8gPLqc3QBQ&usg=AFQjCNEVvKnMCjUBSV7DzJLfOkofjNtZrA

[911TT33]

Thanks, Yoda, but I was referring to this turbo setup on a Porsche 3.3 turbo motor, not a Subaru motor. Afterall, this is a Porsche 930 turbo forum.

[YODA MASTER]

I know, but the site gives you a road has to follow...

[TheTell]

I've been looking at this turbo as an option too.
The compressor map looks fine - it pushes almost as much air as the GT35R.
But it seems like there's a bit of a mismatch in the size of the turbine vs compressor and I wonder whether the hot side of the GTX3076R might be too small and create excessive back pressure.
That might make it quick to boost but choked higher in the rev range.
The Subaru boys liked the GTX3076R, but they have smaller engines, efficient wastegate tracts, and run higher boost pressures, so I'm reluctant to make an $1800 bet based on the Subaru successes.
Be good to hear from someone who is actually running one on a 930 or who has enough expertise to comment on whether the hot side would be too restrictive....

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[911TT33]

Originally Posted by TheTell

I've been looking at this turbo as an option too.
The compressor map looks fine - it pushes almost as much air as the GT35R.
But it seems like there's a bit of a mismatch in the size of the turbine vs compressor and I wonder whether the hot side of the GTX3076R might be too small and create excessive back pressure.
That might make it quick to boost but choked higher in the rev range.
The Subaru boys liked the GTX3076R, but they have smaller engines, efficient wastegate tracts, and run higher boost pressures, so I'm reluctant to make an $1800 bet based on the Subaru successes.
Be good to hear from someone who is actually running one on a 930 or who has enough expertise to comment on whether the hot side would be too restrictive....

Someone here runs a GT30R on their low boost setup, and others have run GT35R turbos. Everyone raves about them and are very happy with the spool characteristics. Hopefully they tune in here and offer their feedback.

IMHO, a 0.82 A/R hot side would be suitable for a 930 motor. Any bigger and it'd be too laggy.