Twin Turbo SC'd STI

[Keyser Soze]

Yup..here's another one... a little more too it though.

http://members.cox.net/fxt/FAT_TT_SC/0003.JPG

http://members.cox.net/fxt/FAT_TT_SC/0004.JPG

http://members.cox.net/fxt/FAT_TT_SC/0005.JPG

http://members.cox.net/fxt/FAT_TT_SC/0006.JPG

http://members.cox.net/fxt/FAT_TT_SC/0007.JPG

http://members.cox.net/fxt/FAT_TT_SC/0008.JPG

http://members.cox.net/fxt/FAT_TT_SC/0009.JPG

http://members.cox.net/fxt/FAT_TT_SC/0010.JPG

http://members.cox.net/fxt/FAT_TT_SC/0011.JPG

http://members.cox.net/fxt/FAT_TT_SC/0013.JPG

[Fly boy]

yup, its offirmative.... I would give my right or left nut for that car.

[Mother Goose]

what the F?? :wtf:

[Telefonica]

do you see what it says? Intercooled supercharged turbo. We were talking about that on the 3SI web board, but came to the conclusion that in the end a supercharged turbo would just be more restrictive than other options. This is interesting, I wonder how they set it up.

[smobag]

twin turbo and its supercharged, i give it 100 miles before the engine explodes.

[Wahooman]

Is there an engine in there somewhere......my techs at Stan's would kick that out the door....what a pain in the ass to work on!!
However, I'd take it out to blow it up though.....pretty fun for the first 15 minutes or so.

[chad]

When an engine is compound charged like that, there are many benefits. You get both the low end boost of the Roots style SC, and the high end of turbos.
A roots style blower is a positive displacement SC. It moves a given volume of air every rotation, unlike a turbo.
Also differing from a turbo, there is no pressure increase within it's own case.
(Lysholm blowers look similar in case design, but have different designed screws and do produce boost within the case)
When you stuff boost into it, it just becomes more efficient, mainly thermally if I remember right.

I cannot make out the maker of the blower on that WRX but it may be a lysholm, if so then it is also more thermally efficient than a Roots.

Let's say for instance you want 40+ psi, you can do it, but yield approx 30 psi compressor outlet temps instead of the typical heat production that 40+ psi would normally produce using a single compressor. whatever style you're using. i.e. blower-blower/ turbo-turbo/ sc-turbo etc.

Garrett is researching a turbo for diesel applications that compounds within its own compressor housing. It is the same diameter but twice as thick. They are seeing approx. double the boost but 50-65% the heat.

Chad

[Keyser Soze]

I highly doubt this setup was meant for crazy numbers. Seems to me to be more of a bragging rights project. I've seen single turbo applications put out much more power. This one just has a cool factor too it. Hate to be the one that has to tune it though..what a nightmare.