vvel vs conventional intake camshaft?

THE BULL

VVEL is truly the ultimate in variable lift. It's truly the second benefit of the VHR, block being the first.

Lets say a standard 330whp on bolt ons you could squeeze another 20whp on these two, even more depending on your tuning and additional parts

The comparison is a tough one.

VHR- In one end you have wide ranging variable lifting cam and one fixed which can only be replaced with higher ones.

On the HR you only have standard practices at increasing lift but you gain full control of cam timing advancing and retarding.

The VVEL system is great however there will be a point where you will reach max power for lift even though the cam can go farther it wont make any more power due to duration. The duration on the VHR controls both cams per bank equally unlike the HR which would be separate.

We see in racing that lift increases valve opening height however you can only do this so far until it's time to close. Duration keeps that valve open longer and helps jams more air in the cylinder as well as give control of variable overlap which means keeping both valves open for a period so the incoming charged air can push the exhaust gasses out of the cylinder for when it's time to combust.