Quote:
Originally Posted by tomnik
Hi Martin,
with clamp and strobe stock begin of injection is 24 deg before TDC (which is 15 deg after TDC with RIV method).
You can advance about 2-3 deg to be more efficient and gain low rpm power.
I learned that 24 deg is a compromise to meet noise level and emission specs.
For standard nozzles and diesel fuel on a stock engine the strobe and clamp is already high level tool.
With custom nozzles and totally different pop pressure on a modified engine the only correct search for best begin of injection is according the pressure curve.
Tom
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Hi Tom,
this is a good discussion
If we are looking for the 24 degrees (start of delivery…moment when injector pops) with the strobe light which is equivalent to the 15 degrees ATDC (RIV light) then this measurement and adjustment would be without any slack of the engine, IP or pop pressure increase… only you mentioned the 1 degree retard from measuring the line close to the injector vs the recommended point of measurement close to the delivery valve.
With the 1 degree retard..are you then saying that you are looking for the 25 degrees for start of delivery measured at the delivery valve?
But then you say that you are advancing anyway 2-3 degrees for more efficiency and low rev power.
So in the end you are looking of something like 26/27 degrees BTDC?
Martin