PG01
Supporting Member
No not dropping it. yes it really is that problematic.
2008 Suburban 5.3 to a 6.0 an easy swap?
- Thread starter cjdz24z28
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
PatDTN
Full Access Member
- Joined
- Jul 5, 2016
- Posts
- 601
- Reaction score
- 421
It would seem to me if it's that problematic GM would be losing lots of money on the system. Bean counters would quash AFM quickly if it was costing them money.
I realize the added fuel economy helps them meet CAFE standards and make some absurd vehicles that don't save fuel. Still, my truck is getting over 18 mpg, and lately after a couple of good oil changes it's edging up over 19 mpg average per tank. Now that's a lot of cruising at 75 mph up and down I40. Still, that's a somewhat hilly stretch and even at 75 I don't hold 6th gear for the whole ride and I do hit creep and go traffic in a number of places in Knoxville. Not to mention I like to use the gas pedal when a-holes are messing up traffic flow.
BTW, cruise control is your friend.
I realize the added fuel economy helps them meet CAFE standards and make some absurd vehicles that don't save fuel. Still, my truck is getting over 18 mpg, and lately after a couple of good oil changes it's edging up over 19 mpg average per tank. Now that's a lot of cruising at 75 mph up and down I40. Still, that's a somewhat hilly stretch and even at 75 I don't hold 6th gear for the whole ride and I do hit creep and go traffic in a number of places in Knoxville. Not to mention I like to use the gas pedal when a-holes are messing up traffic flow.
BTW, cruise control is your friend.
01FormulaTA
Full Access Member
- Joined
- Mar 23, 2017
- Posts
- 534
- Reaction score
- 561
L96 6.0 out of a 2015 Silverado 2500....they have VVT but no AFM, I deleted the VVT and installed a Texas Speed 212/218 Cam before I swapped it in, had it tuned by Black Bear...to my knowledge they dont make a Gen 4 6.0 without VVT, but its easily deleted...
swathdiver
Full Access Member
Two 6.0s did not have VVT but they were for cars, the LS2 and the Pontiac G8s version of the L76. L96 is a great engine. What did you put it in and did you make any videos of it?
iamdub
Full Access Member
I actually wouldn't mind VVT if it's not problematic. I've never researched it, but there are performance VVT cams, right? I just do NOT want AFM. I'll research L96 engines.
swathdiver
Full Access Member
VVT flattens the powerband for both torque and horsepower. It's far more reliable than AFM, we almost never hear of problems with it. TSP is developing cams (has them for sale now) to use it but not sure about anyone else. A VVT cam has an oiling groove in the second journal. A VVT cam can be used in a non-VVT engine but not the other way around.
I learned from Brian Nutter at Summit that our camshafts are more square, meaning the duration is the same on both the intake and exhaust and so is the lift. The 2010+ VVT engines use more duration and lift on the exhaust and less lift overall compared to our set ups which surprised me.
Our camshaft is a Gen IV version of the one found in the L33 ** Gen III motor. It's 193-193 .482-.482 116
Took my wife and daughter out for a drive tonight and was romping on the truck from light to light. Felt great, never able to get fully into it as the speed limits came up so fast.
I learned from Brian Nutter at Summit that our camshafts are more square, meaning the duration is the same on both the intake and exhaust and so is the lift. The 2010+ VVT engines use more duration and lift on the exhaust and less lift overall compared to our set ups which surprised me.
Our camshaft is a Gen IV version of the one found in the L33 ** Gen III motor. It's 193-193 .482-.482 116
Took my wife and daughter out for a drive tonight and was romping on the truck from light to light. Felt great, never able to get fully into it as the speed limits came up so fast.
iamdub
Full Access Member
This is why I'd consider keeping VVT. My Tahoe is a dog off the line. Then, around 3000 RPM (maybe higher- I've never paid that much attention), it feels like "VTEC" kicking in. It's not a smooth increase in power, it kinda jumps ahead like I just hit it with a 50-shot of nitrous. I'll reassess after I get it tuned cuz it may just be TM. If so, then I'll most likely swap the VVT cam for a mild performance one. VVT may be rarely problematic, but it's still something that can go wrong. Besides, wouldn't I need to add a connector and wiring to the engine harness as well as VVT programming to add VVT to mine?
"Our" as in this is what should be in mine?
swathdiver
Full Access Member
It's a dog because of the Torque Management. The 5.3s did not get VVT until 2010. Which RPO is your 5.3? If I remember right you have the LMG, the iron block version of my LC9 and these engines did not get VVT until 2010.
It can be added but would be quite a bit of work and don't think the benefits would outweigh the costs and effort.
Did you notice an improvement in mpg when you did the Airaid MIT?
01FormulaTA
Full Access Member
- Joined
- Mar 23, 2017
- Posts
- 534
- Reaction score
- 561
iamdub
Full Access Member
LMG, yes.
I'm not looking to add extra work or expense to a swap, so I'll just find a non-AFM 6.0 and delete the VVT.
I can't say for sure if the MIT made any difference in MPG. IIRC, I had the AEM Dryflow in within a week or so of buying the Tahoe and the MIT came soon after. Jenn had her own car back then and I drive a company vehicle, so I never drove the Tahoe enough to establish a solid baseline for comparison. I'm pretty confident in saying that the MIT or the filter didn't hurt the MPG. If either or both made any difference in MPG, I'd guess it to be a .5-1 MPG improvement. Mine seems to be getting what it should, compared to most other's feedback.
