K2 Dyno graph
07-21-2006, 10:22 PM
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K2 Dyno graph
Attached is my K2 dyno graph Temp was around 91F with 25% humidity and close to sea level(San Fernando Valley in LA). Dividing the # by .81(19% loss), my car is making 558HP and 629lb at crank. The car is running super rich and Cory is telling me it seemed like the MB recall has put a load limit on the car. The ECU goes back to Kleemann on monday. Hopefully I can squeeze some more HP out of it. All you experts please help me interepret this graph. Thanks
Last edited by andytsai996; 07-21-2006 at 10:52 PM.
07-21-2006, 10:44 PM
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E55
I don't know much about dynos, but I noticed that your chart looks similiar to mine in that it plateaus around 5200 RPMS as opposed to 5800 or 5900. I don't know why mine is doing that, but I have been told potentially A/F ratio (my dyno chart didn't have A/F ratio), S/C pulley slippage, or heat. I think it mught be heat.
https://mbworld.org/forums/w211-amg/155468-renntech-stage-4-dyno.html
https://mbworld.org/forums/w211-amg/155468-renntech-stage-4-dyno.html
07-21-2006, 11:32 PM
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Originally Posted by andytsai996
Attached is my K2 dyno graph Temp was around 91F with 25% humidity and close to sea level(San Fernando Valley in LA). Dividing the # by .81(19% loss), my car is making 558HP and 629lb at crank. The car is running super rich and Cory is telling me it seemed like the MB recall has put a load limit on the car. The ECU goes back to Kleemann on monday. Hopefully I can squeeze some more HP out of it. All you experts please help me interepret this graph. Thanks
07-21-2006, 11:42 PM
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Originally Posted by MB_Steve
What is a load limit?
07-21-2006, 11:44 PM
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E55
Originally Posted by chiromikey
what ever it is, my recall ecu'd e55 won't even burn tires with esp off. it also seems to shut cars down if "it" gets exceeded, to the point that some cars can't even be dyno'd.
07-21-2006, 11:51 PM
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My car spins tires thru 1st gear with ESP on. With ESP off, tire spin in 2nd gear when I punch it around 40-45mph. In dyno mode, it's just endless wheelspin. I'm achieving the Kleeman advertised K2 torque, I'm just missing out on the HP. I'm also worried about CA smog since I have read on this board that they don't like cars running RICH during smog check.
Andy
Andy
Originally Posted by chiromikey
what ever it is, my recall ecu'd e55 won't even burn tires with esp off. it also seems to shut cars down if "it" gets exceeded, to the point that some cars can't even be dyno'd.
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07-21-2006, 11:56 PM
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Originally Posted by andytsai996
My car spins tires thru 1st gear with ESP on. With ESP off, tire spin in 2nd gear when I punch it around 40-45mph. In dyno mode, it's just endless wheelspin.
Andy
Andy
07-22-2006, 12:28 AM
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E55
Originally Posted by andytsai996
My car spins tires thru 1st gear with ESP on. With ESP off, tire spin in 2nd gear when I punch it around 40-45mph. In dyno mode, it's just endless wheelspin. I'm achieving the Kleeman advertised K2 torque, I'm just missing out on the HP. I'm also worried about CA smog since I have read on this board that they don't like cars running RICH during smog check.
Andy
Andy
07-22-2006, 12:29 AM
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That's a strange dyno plot. If I had to guess, I'd say that the bypass valve is opening at 3700 RPM, which bleeds boost and causes the A/F ratio to go rich. Then at 4500 RPM the valve is closed a little, which increases boost and causes the step up in the plots. Then at 5800 RPM it is opened again.
If this is the case, it appears that MB changed the ECU code to reduce boost and limit power, but failed to change the fuel maps to allow for reduced air flow. Or, maybe something else is wrong.
If corrections have been applied to the plots, the torque is about 40 lb-ft low, and HP is down about 25.
If this is the case, it appears that MB changed the ECU code to reduce boost and limit power, but failed to change the fuel maps to allow for reduced air flow. Or, maybe something else is wrong.
If corrections have been applied to the plots, the torque is about 40 lb-ft low, and HP is down about 25.
07-22-2006, 01:27 AM
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Originally Posted by Grumpy666
That's a strange dyno plot. If I had to guess, I'd say that the bypass valve is opening at 3700 RPM, which bleeds boost and causes the A/F ratio to go rich. Then at 4500 RPM the valve is closed a little, which increases boost and causes the step up in the plots. Then at 5800 RPM it is opened again.
If this is the case, it appears that MB changed the ECU code to reduce boost and limit power, but failed to change the fuel maps to allow for reduced air flow. Or, maybe something else is wrong.
If corrections have been applied to the plots, the torque is about 40 lb-ft low, and HP is down about 25.
If this is the case, it appears that MB changed the ECU code to reduce boost and limit power, but failed to change the fuel maps to allow for reduced air flow. Or, maybe something else is wrong.
If corrections have been applied to the plots, the torque is about 40 lb-ft low, and HP is down about 25.
