C63 AMG (W204) 2008 - 2015
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Power loss please help!

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Old May 10, 2019 | 02:27 PM
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C63 Amg
Power loss please help!

Hello MB world (C63 guys) i Hope you guys can Come with some good input for my C63 so i know which direction to look.... I bought a 2009 C63 and imported it from Japan ( i live in EU.) the car is perfect condition 1 owner, 120.000KM full service by Mercedes never winter driven etc so a Really Really well maintained M156 C63 now to the problem..

The car have got primary cat and resonator delete + fresh BMC filters, engine goes like a clock No clicking noise etc.. the car was remapped from a great tuning company in my country and we could not manage to get anymore than 481 BHP Out of the car!. He said to me that normal they produce 515-535 BHP with stage 1+, My car is for some reason aint making more power than 481BHP?? My car is not making any fault codes at all, what do you guys think is the problem since not producing
the same results as others C63 he maked (30+).?

My ideas could be clocked / dirty injectors, MAF sensor but aint making any codes? I dont think spark plugs could take away 40+ bhp either...

What's your opinion? Thanks!
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Old May 10, 2019 | 02:51 PM
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Originally Posted by Nygaard477
He said to me that normal they produce 515-535 BHP with stage 1+,
How are you measuring BHP?
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Old May 10, 2019 | 02:53 PM
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Its measuring engine HP..
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Old May 10, 2019 | 03:02 PM
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Originally Posted by Nygaard477
Its measuring engine HP..
I asked HOW not WHAT.

Brake Horsepower is at the flywheel. How did you physically measure that?
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Old May 10, 2019 | 03:52 PM
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They use expensive dyno i dont know how but they measure engine HP and not whp..
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Old May 10, 2019 | 03:59 PM
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Originally Posted by Nygaard477
They use expensive dyno i dont know how but they measure engine HP and not whp..
How?? Is your engine out?
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Old May 10, 2019 | 04:01 PM
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No on dyno look example at MSL UK they also measure engine (bhp) anyway.. You have any input how i can missing 40 - 50bhp :-/
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Old May 10, 2019 | 04:08 PM
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I give up...
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Old May 10, 2019 | 04:11 PM
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What do you want to know? The car has 481 BHP not whp.... I cannot explain how it can read HP at flywheel but I does the dyno is with rollers.
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Old May 10, 2019 | 06:25 PM
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Originally Posted by Nygaard477
What do you want to know? The car has 481 BHP not whp.... I cannot explain how it can read HP at flywheel but I does the dyno is with rollers.
If your car was on the dyno it read rear wheel horsepower they factored in a percentage to find Bhp. What was your wheel hp. Also what brand type of dyno? Also weather location and elevation of your dyno location. Taking it to the track and see what your trap speed is will be very telling. Comparing dyno to dyno means nothing and without a stock dyno results hard to say what your actual gains were.
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Old May 11, 2019 | 07:03 PM
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Maybe your tune isnt doing anything to the engine.
You should try a dyno with stock tune vs tune to do a comparison
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Old May 12, 2019 | 12:32 AM
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Originally Posted by Jasonoff
I give up...
Why are you so crass on your posts all the time. Everyone is not as “versed” as you are but want answers and knowledge from people like you who supposedly know more than them. That’s why he’s asking questions. Damn dude...
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