Nygaard477

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!

Jasonoff

How are you measuring BHP?

Nygaard477

Its measuring engine HP..

Jasonoff

I asked HOW not WHAT.

Brake Horsepower is at the flywheel. How did you physically measure that?

Nygaard477

They use expensive dyno i dont know how but they measure engine HP and not whp..

NotABaller

How?? Is your engine out?

Nygaard477

No on dyno look example at MSL UK they also measure engine (bhp) anyway.. You have any input how i can missing 40 - 50bhp :-/

Jasonoff

I give up...

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.

AMGonFire

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.

Rick X Joaquim

Maybe your tune isnt doing anything to the engine.
You should try a dyno with stock tune vs tune to do a comparison

prestonhendu

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...