question about VVEL, throttlebody, and drive by wire...

Sharif@Forged

I am not sure where this information comes from, or if something is being lost in translation. The VQ37 VVEL most definately has an intake camshaft, and a throttle plate that works like any other car.

Now, like most newer cars, the TB is of the drive by wire type, with no physical cable connecting the accel pedal to the TB. The VVEL mechanism is on a jack screw, that adjustes lift within a defined area of sweep using a small motor.

I think a lot of this is Nissan marketing of the VVEL, and they are confusing the hell out of people.

Here are some pics of the VQ37 VVEL cylinder heads that we took a while back:







The system is so complex, that I can't really explain it in words, but that black looking upper shaft is what determines lift. There is a camshaft spinning just below it. The camshafts are controlled and secured but a ladder structure. It's almost like a double stacked camshaft. Definately easier to explain in person, with this cylinder head on a bench.

__________________
Sharif@Forgedperformance.com
General Manager/Certified Tuner/NASA-PCA-BMWCAA Instructor
JRZ RS1's Available NOW...PM me
Cobb ProTuner, Uprev ECU Flash, FCON Vpro, Haltech, Motec Certified