W202 OM606 GT2359v+Pro52
W202 OM606 GT2359v+Pro52
Last time was 505whp/799wnm, this time 544whp/858wnm, so about 40hp and 60nm more. Only mods were valve springs, na cam and 4" exhaust. Hard to say which of them gave the most but I think exhaust was main problem. It was 3", now straight 4" from turbo to the back and Y-pipe to 2x3" before back resonator for less noise. On dyno sheet 502whp/826wnm was with one end pipe blocked, so only one 3" end resonator from previous 3" muffler was opened and it took 3hp/32nm off. Whole 3" muffler would have restricted a lot more than only end resonator, so I can say that 3" is small for 500+whp.