Tow Vehicle

[larry_arizona]

I agree that canned tunes are typically junk and octane DOES make most of the gains as it allows timing to be cranked up, appx 10hp per degree of timing and about 1 degree timing per point of octane.

As far as gearing, your tire choice dropped your gear ratio appx .25.....example guessing you had a 3.73 gear, with bigger tire you made it effectively 3.48 ish.

If you want easy power, get a E85 flex kit added to your truck. E85 is appx 103-105 octane and power under the curve is significantly increased. You can get a hybrid fuel tune that you tune for both gas and then full E85 and a alcohol sensor constantly measures and adjusts your tune accordingly. Then you can mix any level of gas and E85.

Most gains are at E50 without a huge sacrifice of MPG.

A cam however won’t necessarily kill MPG unless you drive the truck more aggressively all the time, at cruise speeds your MPG might even improve. Factory cams have to worry about emissions compliance and aftermarket cams do not.

My point is, a good cam will gain power (even a good towing cam) without necessarily sacrificing full time MPG. It will only consume more fuel when you are using the increased power under full load, but that’s true on any engine with more power.

The L96 heads are the same ports as the LS3 heads and flow extremely well stock, in fact they flow slightly better than the LSA and LS9 heads used in supercharged applications making much more HP/TQ.

As far as hard part wear related to a cam install, you are looking at a cam with low .500 lift @.050, this is still stock range lifts for an LS engine. If you were in the .600 to .650 lift range, then I would agree you might need to change valve springs every 20k miles.

The exhaust manifolds will handle any towing cam you cam throw at it, again, not a concern until you get some really high lift cams. Plenty of CTSV’s running stock LSA manifolds making 700+hp to the wheel (appx 800 to the crank versus stock of 556).


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[larry_arizona]

Found a stock vs BTR stage 2 cam swap. Was an engine dyno versus chassis.

Gains across the entire RPM range.




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[Broke Pilot]

L96 heads flow well for a race car that spends its time at high rpm. Rectangular port heads don’t flow well on the street or in a truck at low rpm. That’s where cathedral ports win with port velocity, which is also why they like boost.
Look at that dyno chart, there’s not enough gains under 5k rpm to notice for $2500 for me. And the goal is not to tow your boat at 4500 rpm, so I just don’t understand why you’d throw a larger duration cam in to tow. But that’s just my .02...
also, and I know Brian, big fan of his internals, but look where the dyno starts, 2600 rpm and the factory cam is making more torque and hp.. Doesn’t pick up the new cam til 3100, right about when the truck is gonna wanna shift from 2 to 3 when you’re driving normally. If he’d started that pull around 1800rpm where the converter is just getting settled that cam’s tq #’s are gonna be way down cus you have no vacuum and no port velocity to help the engine breathe.
Bigger cams, whether it’s lift, duration, LSA, and/or any combination of the 3 will only shift the power higher as the numbers get bigger. So again, why put a cam in a tow rig? We want down low grunt to get moving with minimal effort.

Hope we didn’t hijack this too bad...
Larry, we need to hang out, this could be a fun evening over a beer. Lol

[larry_arizona]

Beersssssssss......one is never enough


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[RC_Hinojosa]

I'm just gonna leave this right here....

**Puts on Flame Suit**

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[larry_arizona]

I'm just gonna leave this right here....

**Puts on Flame Suit**

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Brilliant, I love it!!!


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[jcarter20]

I'm just gonna leave this right here....

**Puts on Flame Suit**

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Ha ha....nice! I really do appreciate all the tips from you guys. My only thing is, I am not going to dump $3-4K into a 2011 with 90k miles on it. I would rather run it for another year or so and just get a new (or new to me) truck. I was hoping for a quick cheaper fix....sounds like that would be to go back to those stupid ass looking 265 stock tires.


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[larry_arizona]

90k Miles?? You got easily 200k miles left in that truck.

Problem is GM is still using the same 6.0l in HD’s for the foreseeable future.






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[patrick232]

So for 2019 the 6.2L is available in the suburban with the RST (rally sport truck) package, and my wife needs a new vehicle...the dealership should have the one we’ve been negotiating on this week or next!

I love my 2010 Silverado 1500 6.2 I bought new and plan on keeping it for a long time, but it will be nice to have the extra interior storage of the suburban when the babies come, and still be able to tow the boat up to the in laws lake house with ease.

We were trying to get a deal on a 2018 5.3 but they weren’t moving much on them, so figured we might as well go 2019 6.2 for a couple grand more.

Are u a Costco member? They are doing supplier pricing + $4,500 rebate on the premier plus with 6.2. I switched from a 16 suburban to a 18 Denali with 6.2 and 10 speed night and day

[larry_arizona]

Are u a Costco member? They are doing supplier pricing + $4,500 rebate on the premier plus with 6.2. I switched from a 16 suburban to a 18 Denali with 6.2 and 10 speed night and day

I will say the Ford 10 speeds are fantastic in the GM and Ford trucks.


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