[Vwdiesel] dished pistons

[James Hansen]

depends what you are trying to accomplish.
dished piston will decrease the compression ratio.
Considering this is a motor with a precombustion chamber, any compressed 
air outside the precup is sort of wasted.
You can use different pistons to alter the compression lower, and safely 
run higher boost pressures by lowering peak cylinder pressure, but you 
sort of have to plan this pretty carefully, just like selecting a piston 
dome shape and pin height on a chevy.  Don't want to go below 18.5:1 or 
starting reliability suffers in a diesel.
-james


adamo robison wrote:
> would a piston with indents increase displacement but lower compression. also affect combustion and flow in chamber?
> thanks
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