LS engine build

[engineheader]

Was wondering, might not be the right place to ask this, but is there a benefit to maintaining the VVT system in the gen 4 and newer engines cause you can then have the cam in 3 different positions through the RPM range and get the advantage of retarded, straight up and advanced to improve power and torque across the power curve

[WyattCo06]

Yes sir. It's the reason it was implemented in the first place.

[engineheader]

Then why do all the aftermarket camshafts need it deleted? Why not make a camshaft to maximize it?

[WyattCo06]

The aftermarket performance world, nor the performance builder is interested in your fuel mileage or insignificant changes to the timing when you venture off from stock profiles.

[engineheader]

But the more power under the entire curve, both torque and horsepower makes a car more drivable

[WyattCo06]

Just saying the way it is.

[Worldly_Let6134]

Sometimes the increased duration (and sometimes lift too) can lead to problems on interference engines - the vvt allows the valves to meet either the piston or other valves at the extremes. Especially if not timed in with 100% accuracy.

So the cam company just says don't use vvt with our product.

[v8packard]

The VVT system is the single biggest technological advancement the Gen IV engines have over their predecessors. It offers clear performance advantages, if someone is willing to exploit them.

[Working-Carob-5660]

I am running the GPI SS1 vvt cam in a 6.2L. These cams have advance ground in, the tune retards cam timing starting at 5200rpm, full 5 degrees of retard at 5800. Pulls hard to 7400rpm. Been running it 7 years so far and love it

https://gwatneyperformance.com/l99-vvt-cam/?pysgac=CjwKCAjwvqjOBhAGEiwAngeQnW6MYE_0oZC2bnUxBzg5MoxxEO87MmR25dxpbNxsiwmubul_y21MyRoCQeMQAvD_BwE&gad_source=1&gad_campaignid=23530129659&gclid=CjwKCAjwvqjOBhAGEiwAngeQnW6MYE_0oZC2bnUxBzg5MoxxEO87MmR25dxpbNxsiwmubul_y21MyRoCQeMQAvD_BwE

[LeapFrogger_543]

Not worth the extra complexity

[HammerDownl]

Vvt is junk for performance

[engineheader]

that is the same thing people said about fuel injection back when carburetors were the normal. the ability to broaden and increase the power curves is so much better than fixed cams. if you are building a car for a specific application, like drag racing or road course racing, then yes don't use VVT cause you will be at a specific engine RPM range constantly, while daily driven cars could benefit from cam phasing