Do you mean AVIC from 5EFHE engine ?
If yes, same as T-VIS on 4age
Dont have any test to back it up, but i would say so.
TVIS and ACIS operate differently. TVIS opens at a set rpm point. ACIS tries to maintain a constant powerband and flat torque curve by opening progressively. Simply triggering the ACIS will create a flat spot. People here have used boost to operate the ACIS to little success. The Ultimate offers an automated a better powerband much closer to factory performance.I wouldt just make it open, when boost kick ind.
That varibel dont make it any better.
We tryed it on a 3SGE BEAMS VVTI engine, with varibel cams.
1 running stock ECU, and 1 running Megasquirt and just switched the VVT.
They made almost identical dynos.(I know it is not inlet mani)
We also tryed it on 3SGTE witch runs with T-vis and stock opens at 4000rpm.
We changed it so that t-vis kick ind at boost, it made better powerband.
Just my experence.
TVIS and ACIS operate differently. TVIS opens at a set rpm point. ACIS tries to maintain a constant powerband and flat torque curve by opening progressively. Simply triggering the ACIS will create a flat spot. People here have used boost to operate the ACIS to little success. The Ultimate offers an automated a better powerband much closer to factory performance.
My experience with VVT has been rather different than yours. With VVT disengaged the car made more peak power, but less torque, which is what I expected.
VVT: come in at 3000rpm and stops at 6500rpm moving the cam to a fixed position depending on the engine. On the 4AGE20v its +15degrees.
VVTi (dual as on the SXE10): operates from 1600rpm to 6000rpm and moves the cam +/-15degrees based on load conditions. If you send a constant signal to the VVT solenoid the cam engages straight to +15degrees and stays there until the signal stops. The stock ECU doesn't operate like this.