Quote:
Originally Posted by Leiffi
I think pre-cat temp was something like 600 degrees, max pressure was reached around max hp rpm, at max torque it was even lower.
What I was thinking is that do these engines have bigger injectors to make 450 hp at that low pressure ? Injector part number is different from other xpi engines. If railpressure is for example doubled, will fueling also double ?
Very potential engine, at 1100 rpm at max stock boost smoke limited torque value is about 3800 Nm, so there's lot of extra air if those calculations are right.
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I got R410 and R490 engine files but no R450 yet.
Those two engines have same injectors and I assume R410 is SCR only. It has very low rail pressure, at full load it will start from under 1000 bar and goes to 1500-1600 bar at over 2000 rpm only.
In contrast, R490 seems to be with EGR+SCR (if I understand the maps correctly) and there rail pressure is between 1300...2300 bar at full load depending on rpms. So it's over 500 bar difference at full load and on part load it's even more, about 1000 bar difference between R410 and R490.
R580 V8 which also has the same injectors has got the highest rail pressure, it goes over 2000 bar already at about 1430 rpm and full 2400 bar from 1600 rpm onwards to the end.
There are of course several maps for rail pressure but these values are on three biggest maps that have the highest values on each sw.
Interesting differences for sure. Maybe I should take a look at SOI values also? Leiffi do you know if R410 and 490 have same high compression as 450?