Quote:
Originally Posted by cookiesowns
+1mm of lift and 2-3 degrees of duration is enough to cause valve contact in some motors.. the question is how close are we, and will there be contact without tuning?
Cause if not, what would the tuning get you if you're already at the maximum amount of flow with the MILVS in place and stock valvetronic tables other than maximizing BSFC, and making sure we're still within limits of MBT
Unless somehow there's a calibration process for the DME to know the now new maximum amount of valve lift, which is usually capped to around 9.7mm, but if it's a mechanical change, and there's really no direct position sensor other than eccentric shaft positioning, i'm not sure how that's the case, and a 9.7mm target would now be 10.7mm again, assuming it's a linear change.
I'm going to have to wager that most of the tuning is simply just increasing torque demand appropriately to take advantage of the additional valve lift, and flow benefits of the duration, while making sure injection windows are still within optimal range.
Given that if @yourtuner is tuning with torque in mind, more airflow = more torque, thus the car will target less boost to achieve the same torque demand., meaning raise torque barring ignition timings the same = more boost = moar power, which is where your gains are.
That said, I'm game if someone is game  Maybe have to poke @-Edios to do it..
Sorry for hijacking your @fgc7533 |
Reach out to cobra Marty, I know he's done alot of bench testing and assures his product is safe.
Yes it's 10.7mm of lift with the MILVS.