compound turbo kit?
Lag Hater
Joined: Apr 2008
Posts: 79
Likes: 5
From: Athens, Greece
Here's some pictures of the actual setup in a Z31:
http://forums.hybridz.org/showpost.p...4&postcount=27
I hope this may clarify things a bit.
http://forums.hybridz.org/showpost.p...4&postcount=27
I hope this may clarify things a bit.
i been tossing around the idea of building a compound turbo kit for my car. now that i seen this thread, im looking to follow through on it. any of you guys wanting to do it follow through yet?
I was planning on using either a BNR stage 3 S5 2nd gen turbo or a upgraded Garrett (S15) T28 with the 60 front as the smaller turbo. with a Holsett HX55 as the larger turbo.
all those turbos are relativly cheap and perform very nicely. im sure i can hit full boost (around 30psi) pretty quickly and make some real nice efficient power. This will be for a stock chassis drag FC.
oh, and theres plenty of room i mocked up and measured. you just have to be a little creative with the manifolds.
I was planning on using either a BNR stage 3 S5 2nd gen turbo or a upgraded Garrett (S15) T28 with the 60 front as the smaller turbo. with a Holsett HX55 as the larger turbo.
all those turbos are relativly cheap and perform very nicely. im sure i can hit full boost (around 30psi) pretty quickly and make some real nice efficient power. This will be for a stock chassis drag FC.
oh, and theres plenty of room i mocked up and measured. you just have to be a little creative with the manifolds.
Rotorhead
Joined: Feb 2001
Posts: 9,136
Likes: 39
From: Charlottesville, Virginia, USA
Oh great, the thread that I missed is active again so I guess I should fix it before this forum starts sounding like the ricer and redneck forums...
It would be a kit that allows the exhaust of the turbocharger(s) to feed into a turbine that helps drive the engine's output shaft.
One compressor feeding another compressor is actually called "staging". The "compound" terminology is slang. If you want to search for more information on the personal diesel and muscle car websites then "compound" will probably work, but if you try to look it up in a book, SAE paper, or major turbo manufacturer's catalog or website then you will find it under the "stage" term.
Also, it is normally a big turbo that feeds a smaller turbo. I don't think it would work very well the other way around. Garrett reccomends a difference of about two frame sizes.
1. The FD uses parallel staged turbos, while the subject of this thread uses series staged turbos.
2. The FD turbos are sequenced. From what I gather, the subject of this thread assumes unsequenced turbos, but you could sequence them as an option as seen in the Opel setup previously posted in this thread.
Wow, somebody who actually knows the answer! 
It would be a kit that allows the exhaust of the turbocharger(s) to feed into a turbine that helps drive the engine's output shaft.
One compressor feeding another compressor is actually called "staging". The "compound" terminology is slang. If you want to search for more information on the personal diesel and muscle car websites then "compound" will probably work, but if you try to look it up in a book, SAE paper, or major turbo manufacturer's catalog or website then you will find it under the "stage" term.
Also, it is normally a big turbo that feeds a smaller turbo. I don't think it would work very well the other way around. Garrett reccomends a difference of about two frame sizes.
2. The FD turbos are sequenced. From what I gather, the subject of this thread assumes unsequenced turbos, but you could sequence them as an option as seen in the Opel setup previously posted in this thread.
Nope, that is not the defitnition of a compound turbo.
"Many people erroneously refer to these type of turbocharger arrangements as "compounds". They are nothing of the sort. By definition, turbo-compounds pass the exhaust gases though a turbine, that is true, but the shaft power from the turbo is coupled directly to the crankshaft through reduction gears and supplements the crank brake work. "
"Many people erroneously refer to these type of turbocharger arrangements as "compounds". They are nothing of the sort. By definition, turbo-compounds pass the exhaust gases though a turbine, that is true, but the shaft power from the turbo is coupled directly to the crankshaft through reduction gears and supplements the crank brake work. "
grease monkey
Joined: Apr 2009
Posts: 433
Likes: 1
From: peru, IN
I believe garrett makes a sensor to track shaft speed of some of their turbos. if you could wire this to control a wastegate for the small turbo in a compound system........sounds like a science project to me lmao
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