Aren't 1400bar pumps almost the same as 8/10v JTD ones? I know the difference was only in the pulley and that 1400 ones were designed for higher rpm. But they are still CP1.
You're absolutely right. My pump operates at higher rpm compared to its 8/10v JTD counterpart, nevertheless, it is a CP1. I've thought seriously on moving to a CP3 pump, but there are some technical issues that must be sorted in order to use this pump with my ECU, just as Tribesman mentioned. Anyway, with my current power levels, I really have no use for the much better CP3 pump. Going from 1750 to 1800bar would represent an insignificant 1% power increase. Although, the CP3 pump would make sense in a +1800bar scenario, but haven't studied what must be upgraded along with the rail pressure sensor, which I know from experience (159 JTDm) can't read more than 1815bar.
zbrskz You handle all that power with your stock 1.9jtdm gearbox? I've heard 2.4 jtdm 175hp gearboxes were kinda weak and couldn't handle the power you have for example..
Power doesn't directly stress the gearbox, torque does, and specially the way it is delivered. That is the reason why I limit my torque to 500Nm. Another good thing is to use a good lambda limitation factor, not to limit smoke, but to prevent that 500Nm are delivered in a "flash". I've found clutches and transmissions to be a lot more sensitive to torque rather than the gearbox itself.
Regarding this topic, I wouldn't be too comfortable with the 625Nm I've mentioned for the 2.4, because I really have no idea of what its gearbox "thinks" about this ...