Quiz
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10-26-2007, 08:29 AM
#22
id say
the rs6 will have more power overall, will create more boost since its bigger, but the hybrids will probably have a better powerband. Its going to depend on what one is tuned better/fueling.
10-26-2007, 08:37 AM
#23
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Does the stock K04 compressor housing even fit the RS6 wheel without machining?
The answers (without actually running the dyno test) can only come from reading accurate compressor and turbine maps and what the software parameters are(load, etc).
Is this your point? That there is not enough information to produce an educated guess?
Is this your point? That there is not enough information to produce an educated guess?
10-26-2007, 10:24 AM
#24
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The "OEM hot-side" specification does give a marked TIP advantage to the full RS6's...
It also depends on the boost pressure you're running. The lower volume of the RSK04 compressor housings should have a PR advantage. Despite this, I doubt it'll be nowhere near enough to overcome the benefits of reduced TIP... which would make it's effects known around the same flowrates as any PR advantage. At 7000RPM an unported/unclearanced/unclipped RS6brid would be experiencing an assload of TIP, I'd guess 3:1 or better. This wastes so much energy in expelling the exhaust gases... choking the whole system.
That being said. I'd be very interested in a comparison between "kitchen sink" RS6 hybrids versus the straight RS6's. Given my experience with TIP testing on worked housing RS6brids... it would be quite interesting.
I'm still dying to see a hot-rod Prius doing burnouts
That being said. I'd be very interested in a comparison between "kitchen sink" RS6 hybrids versus the straight RS6's. Given my experience with TIP testing on worked housing RS6brids... it would be quite interesting.
I'm still dying to see a hot-rod Prius doing burnouts
10-26-2007, 10:27 AM
#26
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I'm assuming you mean OEM hot side since cold has to be machine for rs6 wheels
so its more like rs6/K04
if they are perfect machined and no mfg problems on hybrids(very hard to achieve).
I would put my money on the full rs6. Not only it has matched the hot too cold side but it has greater a/r. Also as many have said temp will increase on hybrids, you would have def to make more boost on the it to compensate for the shorts ends, making the turbo less reliable(higher shaft speed).
The only down side i can see to the full rs6 is what lemieux said, the engine exhaust output is not as hight as the 4.2(original design of the turbos) so it might take a longer to spool and it will increase back pressure a bit but again since the hot side is bigger the shaft will have more torque to compress the air so for the same out of aid moved on both cold sides the hot side on the hybrids is working harder.
if they are perfect machined and no mfg problems on hybrids(very hard to achieve).
I would put my money on the full rs6. Not only it has matched the hot too cold side but it has greater a/r. Also as many have said temp will increase on hybrids, you would have def to make more boost on the it to compensate for the shorts ends, making the turbo less reliable(higher shaft speed).
The only down side i can see to the full rs6 is what lemieux said, the engine exhaust output is not as hight as the 4.2(original design of the turbos) so it might take a longer to spool and it will increase back pressure a bit but again since the hot side is bigger the shaft will have more torque to compress the air so for the same out of aid moved on both cold sides the hot side on the hybrids is working harder.
10-26-2007, 10:42 AM
#30
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The quiz assumes OEM housings to keep it simple.
A machined compressor housing would actually reinforce the argument. My point was to allow a qualitative judgment without data (often unreliable), based on empirical facts. Nick Gustas has it right.