I'm building an LQ9, .030 over, Mahle LS2 replacement pistons, 799 heads, will have the block decked when bored to bring the C/R to around 11:1, TBSS intake, 92mm throttle body, 1 3/4" long tube headers, plan on 3 angle valve job, back cut valves, & some minor port work(mostly clean up) for the heads, backing it up with a 4l80e, currently have 3.73's, but may go to 4.10's with a 29.5" tall tire, and putting it into my OBS 2 door TAHOE. It's similar weight to a TBSS and I want to be able to do some towing with it, but mostly street driving on 93 or E85.

I haven't decided on a cam or converter yet, but I'm leaning towards the texas speed stage 3 high lift truck cam and probably a 2500-2800 stall, but looking for advice as this will be my 1st LS build.

 

Sounds like a good choice to me honestly

 

I agree, my 6.0 with 799s and 10.4 has a 2800 stall 4l60 with a BTR truck 2 and 3.42s and will light up tires without mercy and has power everywhere

 

Is this the cam your looking at?

https://www.texas-speed.com/p-8558-t...-camshaft.aspx

 

Yes, that's the one. Nothing to radical as I need to keep it so my wife can still drive it(it's our 3rd/backup vehicle), but something that should let it breathe, and make a little extra power. I'm not concerned with a lopey idle, I would be just as happy with a stock idle, it's the performance I'm after.

I was also looking at the Cam Motion Titan 2 truck cam, but it only has .553 lift, and I believe the 799 heads with a good valve job & back cut valves can take advantage of that extra lift.

 

Look at the SUM-8728R. It can be tuned to have a mild or lopey idle. And can drive like the factory camshaft. Has .600 intake and .585 exhaust lift.

 

OP,

We really like the direction you're taking with this OBS 2-door Tahoe! The cam selection you're considering is solid, especially with your planned head work and compression.

We’d recommend checking out our SUM-8720R1 Stage 2 High-Lift cam. Here are the specs: .600/.600 lift 218/227 duration 112+2 LSA with -1° overlap. This cam will deliver strong mid-range and top-end power while maintaining good low-end torque. Expect it to come alive around 2,500-3,000 RPM and pull strong through 5,500-6,000 RPM, with power carrying out to around 6,500+ RPM. It’s an excellent match for your setup and goals offering easy tuning and solid drivability.

Depending on idle speed, you can expect anything from a smooth idle to a noticeable lope.

Here’s a clip of this cam idling in an L77 6.0-swapped 2007 Escalade:

For valvetrain stability at .600" lift, we recommend pairing it with our .600" lift beehive springs. Upgraded pushrods are also a must. Typically a 7.400" or 7.425" pushrod works at this lift but tolerances vary, so we always suggest measuring pushrod length using a pushrod length checker before finalizing your selection.

If you add 4.10 gears and a 2,500+ stall converter, this OBS Tahoe will definitely turn some heads. Even with 4.10s, it would still be efficient and maintain good mileage thanks to the overdrive gearing, thanks to the 4L80E’s 0.75 OD ratio. Here’s what you can expect for cruising RPM in OD with a 3.075 final drive ratio and 29.5" tires:

• 45 MPH → 1,577 RPM
• 55 MPH → 1,927 RPM
• 65 MPH → 2,277 RPM

With the planned head work, this setup should run fine on 93 octane for daily driving. However, for towing or max power, switching to E85 would help unlock more potential. If you're considering this, make sure you have:

• Proper injector sizing to support the additional fuel demand
• A flex-fuel sensor to allow real-time fuel adjustments
• ECU tuning for seamless 93/E85 switching
• Ethanol-compatible fuel hoses and lines to prevent degradation

Let us know if you have any questions. Excited to see this build come together!

 

Yea id go with that one or the cam motion cam.
https://cammotion.com/ls-camshafts/t...212-220-112-4/

.553 lift isnt a issue since your wanting it to do truck stuff.
I use that cam motion and this one in a bunch of 5.3 and 6.0 trucks with DOD Deletes.
This one idles good as stock and enough power gain to notice it and tunes very easily.
https://cammotion.com/in-stock-ready...206-210-115-5/