RomRaider

Hello everyone,

My car bmw e46 323i 1999

I have two questions about the Disa valve and vanos from an ms42 m52tub25. Maybe anyone from here see that the disa valve opens at 4010 tpm at full trottle and the m52tub20, m54b25 and the m54b30 opens the disa at 4100 tpm and never close to the max rpm. Did anyone knows why this not hapen with the m52tub25 and also the m52tub28 ms42?

I have changed the Disa table from my car (disa open from 4010rpm to the max rpm with full trottle) and it seems like that i have more power at high rpm.

Can someone tell me why the disa opens at 4010rpm from the factory and close at 5500rpm on a m52tub25 and not opens from 4010 to max?

2-

does 120 degrees mean that the intake valve opens earlier or closes later? does 105 degrees mean the exhaust valve will close later or earlier?? can anyone explain this?

The maximum power of this engine is limited by a closed DISA valve at hight rpm.