Quote:
Originally Posted by tall boy
Leiffi. I had the suspicion that you came out of the land of fairytales but now you confirm it. You have absolute no idea on type of camshaft and parts numbers. Maybe finnish Scanias use different cams. You must be joking.  A load of BS Leiffi as finnish Scanias also have to apply to the Euro standards as well and if not Scania use something like fuel optimised in the engine specifications but still the same cam fitted.
Again great story Leiffi. Timing is limited to about max 15° btdc, euro4 cam gets over 20°. You juts confirmed that the Euro 3 cam has more advance lift and the Euro 4/5 cam need more advance timing due to les cam lift in a advanced state and more trapped fuel volume in the pump chamber that needs to be compressed BLA BLA BLA. Back in 2010 when we start working on the DC1601 engine we did some injector testing. Coil on time to BIP or valve closed on pump chamber and used a piezo element to detect begin of injector opening. As to our surprise the PD is not that accurate and even if the BIP is used by the ECU as a timing reference there is still a large delay on begin of injection as you need to compress the fuel and lift the needle in the nozzle chamber as well that will take some fuel volume giving a relative slow nozzle flow increase and it’s vital to have a fast cam lift increase on hi RPM and load and the DC1601 cam provides this lift. Other things is on the D1608 and onward the piston dome and nozzle spray angle is different so the 800Kw marine nozzle may not be ideal but you could look @ nozzle from the DI16 077M engine but this already uses the 130mm bore size.
What we did in 2012 is rebuild most of the PD injector and made it 30% more accurate by reducing needle lift volume with a different type of nozzle and made modifications to the solenoid valve gap in all making >30% more power with the same ECU settings but it produces smoke operation under 1200RPM so not ideal for commercial use and that’s also why we never went racing with PD engines and jumped to XPI engines. |
You didnt understand but that ok, not the first time. Good luck wirh your projects, you need it.