KALVERT

I have all the parts to do the swap but do i need anything else after the swap? i dont want any driveabilty problems afterwards nor do i want engine lights. Just bought my 2011 today and i am ready to wake it up a bit.

Vortec350ss

iTrader: (20)

You will need to delete VVT.

I'm not so sure I'd be jumping the gun on the LS9 cam. Me personally I would be looking for an LS6 cam first if you were dead set on the factory cam.

KALVERT

I work at a GM dealership, so i get cost on parts...had read the the LS9 cam was good for the 6.2L so i ordered it, but if they're better factory options let me know. I dont want any aftermarket cams. Warranty will pay for the install and lifter etc so im just buying the cam,springs,timing cover, and gear.

Vortec350ss

iTrader: (20)

The LS9 cam is really better tailored to boost. Its valve events are very extreme in a NA engine and it will hurt your low RPM performance big time. There is gain to be had up top, though, and most people brag about peak numbers on a dyno. The LS6 cam will give you more power under the curve. I have an LS6 cam in a L96 6.0 in my daily driver with the same L92 heads and it performs well. I'd bet in your engine its happy with a 6300-6400 RPM shift point without feeling to overworked. The LS6 ans LS3 cam share the same intake lobe, LSA, and ICL. Oddly enough the LS3 cam has a smaller exhaust lobe in terms of both duration and lift. That goes against almost everything we know about LS3 heads. The LS6 cam would make more power in the LS3 than the LS3 cam does... don't ask me why they did this. My only guess is emissions.

The other option is the LS7 cam. That doesnt have nearly as much popularity in our engines but it has similar specs to the LS9 with a narrower LSA. It would also outperform the LS9 cam in your application. I am not totally familiar with the lift of that cam though... it uses 1.8 rockers stock.

Anyway... if the LS3 is rated at say 425 with your exhaust system, I would say the LS6 cam is capable of at least 430 if not 435 in your engine. If you go with the LS9 cam you will hurt performance below 4000, it will be nearly the same as stock from 4000-5000, and it will start to perform a lot better from 5000 up. You will also need to shift at 6500 or higher to really exploit what the cam has to offer.

KALVERT

Any idea on needed part numbers for the LS6 cam swap?

Vortec350ss

iTrader: (20)

12565308

KALVERT

so just use the rest of the parts i ordered from this article?

2011 Chevrolet Silverado LTZ LS9 Camshaft Swap - GM High-Tech Performance Magazine

KALVERT

Decided I'm going with the ls9 cam swap and getting tuned....