friz
Senior Member
Came by a mid 80's BMW marine diesel D190 turbocharged 165 HP but missing the exhaust/riser. Had one fabricated at a custom exhaust shop but....the pipe coming out of the turbo is is 3 1/2" ID. The welder has stepped it down to 2 1/2" ID about 3" later. When asked why he responded "that is what most of my customers want". I was worried about back pressure created by the step down but he told me it was not an issue. So I accepted the exhaust on condition. It is a dry riser. The raw water connects to the riser at the downhill end. Any feedback on the step down welcomed. Engine is still on the stand and has not run yet. Photo is the engine before "exhaust/riser". The turbo is visible on the side.