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Old 05-23-2008, 11:49 PM   #1 (permalink)
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Supercharged

Has anyone ever supercharged a cummins? Let me know if you've ever heard of such?
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Old 05-24-2008, 12:14 AM   #2 (permalink)
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Its been done. Turbo with a supercharger.
I think it was Piers who did it a long time ago.

There are pics floating around somewhere.
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Old 05-26-2008, 10:31 AM   #3 (permalink)
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id rather do twin turbos
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Old 05-26-2008, 10:47 AM   #4 (permalink)
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WHY?

Turbo and supercharged diesel engine is the best of both worlds.

Supercharger eliminates ALL turbo lag. You have instant boost from idle to max rpm.
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Old 05-28-2008, 09:49 AM   #5 (permalink)
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Yes about the lag, BUT, a supercherger puts an un-needed draw on the engine, and how often do you need that instant boost...
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Old 05-28-2008, 09:55 AM   #6 (permalink)
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theres a guy in the diesel place that has a twin turbo supercharged duramax. supercharger spools the turbos REAL quick. looks bads$$ red. with corvette exhaust
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Old 05-28-2008, 11:30 PM   #7 (permalink)
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yea it spools wuicker but it maxes out quicker. a turbo can keep building boost. also, it is an unnecessary draw on the motor. im sure on that DMAX they are centrifugal chargers, which really are not the way to go. you can only make so much boost and it draws power from the motor. turbos make much more psi. and u get twins to eliminate lag. thats why a smaller one is first, so it can spool the bigger one and make a crap ton of boost. thats just my oppinion
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Old 05-28-2008, 11:35 PM   #8 (permalink)
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Agreed...impractical.
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Old 05-29-2008, 08:12 PM   #9 (permalink)
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Yeah, I guess the "gurus" of diesel performance are wrong.
This is what Harry and Piers did some time back.
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Old 06-02-2008, 01:21 AM   #10 (permalink)
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Impractical only if the information about the actual facts are flawed. The Duramax in question has a centrifugal supercharger and a single GT4505 turbocharger. The supercharger is clutch actuated and disengaged over 15psi. This is a very practical solution for 600+hp in a daily driven application, the truck in question is daily driven @ 733hp. So I would bide my words if actual understanding of an idea escapes you.
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Old 06-02-2008, 03:44 AM   #11 (permalink)
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I have never, ever heard of a clutch actuated supercharger, but if you could get one set -just- right it would be perfect!! kind of like mad maxes, flip switch that nobody can figure out how to disengage a supercharger....
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Old 06-02-2008, 07:58 AM   #12 (permalink)
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Mad Max had one on his interceptor. Course that was just a movie
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