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Pettersen · 06-17-2012, 07:59 AM

It refers to the shape of the combustion chamber.

LDR = Leading deep recess Good performance high emissions.
MDR = Middle deep recess Compromise to get down emissions.

06-17-2012, 07:59 AM	#2
Pettersen Rotary Fanatic Join Date: Mar 2010 Location: Norway Posts: 163 Rep Power: 16	It refers to the shape of the combustion chamber. LDR = Leading deep recess Good performance high emissions. MDR = Middle deep recess Compromise to get down emissions.