Silversierra10

I searched the web a lot but could not find the OEM camshaft specs for a 2010 gen4 4.8L (l20). Is there a database or website I could find that info? Or if anybody has it on hands... It would be nice lol

Need that info because I want to upgrade to a mild lift torquy cam within 1500-6000 RPM. 3.73 gears.
I have vvt, no dod, 799 heads, high flow air filter/ SS dual trush muffler. 1 bolt vvt cam, stock.

​​​​​​And if possible, valve to piston clearance (all stock, 799 heads) thanks 😊

Vortec350ss

iTrader: (20)

I don't know the stock cam specs off hand but its fairly easy to spec a cam that will deliver what you are looking for without knowing them.

Keep in mind however its hard to add bottom end part throttle torque with a cam when changing from factory. Adding power across the board WOT is not that much of a challenge.

1994Vmax

iTrader: (4)

From what I have found beyond being a 1 bolt design it's the same cam as the older Gen III 4.8 and 5.3 cam. 191/190 .457/.466 on a 114 LSA. The LSA could be wider though but that's what I have.

Makes sense in a way.. the LY6/L96 engines run almost an identical grind to the LQ4/LQ9 Gen III's even though they now have rectangular port heads and VVT.

I always say this with the Gen IV 4.8's regardless of what you choose. Bumping your compression from the dismal 8.8:1 you have now will help you regardless of your cam choice.

turboal1

the cam in a 6.2 L9H mite help. it's a VVT
198/209 .500/.500 115 LSA
this should help all the way around
in a 4.8. just throw on a set of good springs.

swathdiver

Summit Racing maintains a database but does not always include the part numbers on each camshaft. The specs posted by 1994Vmax are correct for your engine. The camshaft's part number is 12625437.

Consider on of Crane's PowerMax LS camshafts, they do not require a spring upgrade as lift is around .502 and under the .520 or .530 max for the stock springs, forget which.

You can look around for a VVT cam, factory or aftermarket or convert to an Gen III set up and pick from a much larger selection of cams such as the aforementioned ones by Crane.

Where do you fish for bugs? I used to do it here in Florida by diving.

Silversierra10

We fish not far from the Maine waters in the middle of the St- Lawrence Gulf, we set 273 traps every spring, by trawls of 7... Fish em in 20 to 110 feet deep. 35 to 50 foot boats.
thanks turboal1 for the idea of the 6.2 cam, and yes I know I could delete vvt but seems like a big headache to what I can read on the web. And I'd rather just throw a stick in there myself and hope for the best... If that wouldn't work well, I'll just shove a L96 in there with @ 6 speed.. L96 2000$ 6.2l 3600$... Lol that crazy,, them scrapyard fellas really think were completely ignorant.. I can order a rebuilt 400+ HP 6.0l from summit for near the same price.. Thanks again guys for the info

swathdiver

Pretty cool, I miss being out on the water.

turboal1

Silver, that 6.2 cam is a VVT, it should be a drop in for you.
I kept the VVT in my motor, you just need a good tuner.
I plan on putting the 6.2 cam into a 5.3 VVT that i am working on.

Silversierra10

The 799 heads have the ls6 springs I believe.. So they should handle that cam right?

Drspencer

iTrader: (1)

Are you planning on using forced induction? If the heads are coming off, which, I guess they don't have to if you're just doing a cam swap, consider Super Chevy did a test with all the popular LS heads and the 706/862 heads made the most power on a 5.3. Probably something to do with the small engine size and velocity of the port. You can sell those 799s for $400 and find a set of 862/706 for like $150.


Surprising HP Numbers From Our Stock LS Cylinder Head Test


But...if you're just swapping the cam, nevermind...disregard