Hello.I have a m20b20 engine with a charger.What can i do to make good kpa? 50 is to many(( 800rpm, 20deg on idle.If without charger, it is 46kpa.
What is wrong with 50Kpa? ???
It is not normal pressure on idle i think? normal is near 28-30kpa?
It depends from cam. Narrow cams with zero overlap gives lowest absolute pressure. With overlap increase pressure rises. In some cases it can be in 90...100kpa range.
Gints
cam is stock )) may it be from changed degree of compression? it was 9.4, now is 8.0
I would say that is normal pressure
50 is perfectly normal for a stock M20. It will loose some from the lower c/r.