BMW M235i - JB4, Decat downpipe and rolling road testing

BMW M235i - JB4, Decat downpipe and rolling road testing

Take a look at our recent blog posts and you'll see just how many N55 engine cars we have tuned in the past. People travel from all over the country to have the Burger Motorsports JB4 installed, as well as our Richter decat and sports cat downpipes, set up with custom settings on our rolling road.

The reason for this can be seen on the graph below. For a moderate amount of money, the tuning potential these engines have is huge! It's no wonder we've had three of them ourselves and probably tuned over 100 in house since they were brought out.

The graph below shows stock with the decat already installed, map 2 and map 6. With map 6 settings we like to reduce the power and torque a little bit in the low rpm to help with traction and to allow a stronger powr gain in the high rpm.

Power gained: 73 bhp

Torque gained: 111 nm

BMW M235i rolling road dyno graph

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