RS4 (B7 Platform) Discussion Discussion forum for the B7 Audi RS4

ouch :( * RS4 dyno inside *

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Old 09-17-2006, 11:32 AM
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Default ouch :( * RS4 dyno inside *

the gt25 B5S4 and rs4 were on pump gas, the ko4 car was on race gas.<ul><li><a href="https://forums.audiworld.com/s4/msgs/2473953.phtml">https://forums.audiworld.com/s4/msgs/2473953.phtml</a</li></ul>
Old 09-17-2006, 01:00 PM
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Was the guy a member here? I'm curious to hear the explanation.
Old 09-17-2006, 01:00 PM
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Default Why would the RS 4 not hit 400+? There has to be a reason other than Audi is lying......

For anyone who has been in one you know the GD car gives you whiplash and a 280hp car of its weight shouldn't do that. So can someone please explain why the hp and real road action of the car don't match?
Old 09-17-2006, 01:09 PM
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Default The RS 4 blew the S4 away in non side by side test drive perception and the B7 S4 is what 340hp?....

Maybe his car was not reprogrammed from shipping mode from the dealer? What color was the car it might have been a slow one? :-)
Old 09-17-2006, 01:10 PM
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Default It isn't expected that the car makes 420 hp at the wheels...

because some power will always be lost though the driveline.

However, 280 is too low. It should be over 300 though IMO.

I wouldn't be surprised at all if some of the cars were only making 390-400 hp at the engine.
Old 09-17-2006, 01:12 PM
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What would be the standard % loss?
Old 09-17-2006, 01:17 PM
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Default Depends on the car and the dyno. There is no "standard" loss.

The best is to dyno at a shop that has enough expeience with quattro cars that they know what cars "should" put out. Basically all Audi Torsen cars of the same transmission type should have similar losses.

A "ballpark" figure for an Audi quattro car is 25% loss +/- 5% depending on dyno.
Old 09-17-2006, 01:36 PM
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Default Verr?ckt is correct. A TorSen/Quattro car can be expected to loose ~ 25% ...

So the RS4 with its 414 BHP should get between 305 to 310 WHP.
Old 09-17-2006, 02:41 PM
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Default Do we know if the motor on the RS4 is broken in yet? I would not dyno test an RS4 and expect...

Good numbers before it hit at least 5000 miles.
Old 09-17-2006, 03:08 PM
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sounds a tad low for the rs4, but still close.


Quick Reply: ouch :( * RS4 dyno inside *



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