Quote:
Originally Posted by Fred68
I'd forgotten about the bottom entry, it's a long time since I've seen a standard 180 filter box. That D shaped hole has a larger area than the butterfly. Did you know throttle butterfly is only 55mm across?
The 190 engine has many differences to the 180. The inlet cam is different. It has a couple of degrees extra open time and it's been advanced 4 degrees too iirc.
The ECU mapping is slightly different too. Air filter is different as is the exhaust system. Otherwise the engines are the same.
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The D shape hole is the same size as a 50p, thats much smaller than the butterfly.