Adding Super Charger 2013 GMC HD 6.0
#1
Adding Super Charger 2013 GMC HD 6.0
I have a question concerning adding a Super Charger to my 2013 6.0 HD. Just got it last Nov and have got an (approx.) 8,000lb travel trailer to pull. While going up fairly long inclines, the truck just doesn't seem to have enough grunt without going into lower gear and 'Screaming' at approx. 3500 - 4000 RPM! Would an Edlebrock Super Charger help/solve this problem? The truck has 77K miles but, is in very good shape. Also, where would I find the information on what type of trans that the truck has? I mean, I've heard it could be an Allison but.... How do I know? Thanks in advance.
#2
Senior Member
Posts like a Turbo
Welcome to the forum. I believe the Allison transmission is only available with the Duramax diesel so I doubt you have that. Members here would need a little more information before making recommendations, e.g. what is your rear end ratio?, are you using the tow/haul mode? at what speed and what gear are you in when you're hitting the 3500-4000 rpm range? you may be able to find transmission and rear end production codes either in the glove box, back side of the passenger side sun visor, or the drivers side inner fender well.
#3
Welcome to the forum. I believe the Allison transmission is only available with the Duramax diesel so I doubt you have that. Members here would need a little more information before making recommendations, e.g. what is your rear end ratio?, are you using the tow/haul mode? at what speed and what gear are you in when you're hitting the 3500-4000 rpm range? you may be able to find transmission and rear end production codes either in the glove box, back side of the passenger side sun visor, or the drivers side inner fender well.
#4
Senior Member
Posts like a Turbo
Tony, first of all, your trans temps are just fine, you don't need to get nervous about them until they start climbing over 200 degrees F. I've never owned a p/u with the 6.0l but a little research tells me in your application maximum torque isn't reached until 4200 rpm which to my thinking is a bit high but that'* where you want to be when towing a heavy load up a grade. My only experience with a p/u with the tow/haul mode is my Dad'* Silverado with a 5.3, didn't take me long to ditch the switch on the stalk and just pull the shift lever into 3rd, 1:1, with your transmission that would probably be 4th gear as I assume you have 2 o/d ratios with the 6 speed. A little disclaimer here, my experience with towing a heavy load goes back years, a 84 K-20 HD that I used to haul around a 3000+lb camper with gear while towing about 3000 lbs of ski boat. That K-20 also had 3.73 gears,but had a manual transmission and a 350 that had almost as much torque as your 6.0 l but at about 1000 less rpm. Anyhow before spending the time and money on boosting, I'd try the trip to Sodac, you'll encounter grades from KY, but after all you won't be climbing the Rockies.
#5
Tony, first of all, your trans temps are just fine, you don't need to get nervous about them until they start climbing over 200 degrees F. I've never owned a p/u with the 6.0l but a little research tells me in your application maximum torque isn't reached until 4200 rpm which to my thinking is a bit high but that'* where you want to be when towing a heavy load up a grade. My only experience with a p/u with the tow/haul mode is my Dad'* Silverado with a 5.3, didn't take me long to ditch the switch on the stalk and just pull the shift lever into 3rd, 1:1, with your transmission that would probably be 4th gear as I assume you have 2 o/d ratios with the 6 speed. A little disclaimer here, my experience with towing a heavy load goes back years, a 84 K-20 HD that I used to haul around a 3000+lb camper with gear while towing about 3000 lbs of ski boat. That K-20 also had 3.73 gears,but had a manual transmission and a 350 that had almost as much torque as your 6.0 l but at about 1000 less rpm. Anyhow before spending the time and money on boosting, I'd try the trip to Sodac, you'll encounter grades from KY, but after all you won't be climbing the Rockies.
Thanks for the input Rog. I was just thinking the trip next year would be a lot of miles and with the hills I thought it would help in the long run. Also, thanks for the info on the trans temps. It just seemed like it climbed high very quick, guess I just wasn't expecting it... About the tow/haul button. Doesn't that just adjust shift points so the trans doesn't hit so hard under a load? Plus, my gear selector doesn't give me the option of going down one gear (unless I do it manually) Gear selection is: PNDM. (with a button on the stalk (arrow up/down) to shift manually) I could select 5th or even 4th manually but then would it shift automatically if it needed to go lower? Of course, if I felt the engine 'lugging', I could always shift lower I guess... Too many questions... Anyway, thanks for your help.
#6
Senior Member
Posts like a Turbo
Tony, I think with a little more experience with your tow vehicle/trailer combination especially on grades you'll soon learn the sweet spot where your motor wants to be rpm wise, sometimes it'* just a matter of feel, "flying by the seat of your pants" sort of thing. I'd just keep a closer eye on the tach and shift manually to keep it in that sweet spot. As far as I know the 6.0 is a pretty stout motor so even with your mileage you'd probably be ok to boost if you're willing to shell out a few grand to pull in a higher gear or two, but I'd thoroughly research it first, one of the things would you need to start using premium gas? Back in the day, RV cam grinds were popular to bring in peak torque at a lower rpm, but I'm not even sure they're available today, even if they are then you would be looking at a host of other issues like probably getting a custom PCM tune.
#7
Senior Member
True Car Nut
I have a question concerning adding a Super Charger to my 2013 6.0 HD. Just got it last Nov and have got an (approx.) 8,000lb travel trailer to pull. While going up fairly long inclines, the truck just doesn't seem to have enough grunt without going into lower gear and 'Screaming' at approx. 3500 - 4000 RPM! Would an Edlebrock Super Charger help/solve this problem? The truck has 77K miles but, is in very good shape. Also, where would I find the information on what type of trans that the truck has? I mean, I've heard it could be an Allison but.... How do I know? Thanks in advance.
That said, a Chevy 350 from the 70'* pulling at 3,000-3,500 would make folks used to 50'* inlines cringe. Those would be about wound out at 3,500 let alone staying there for any length of time.
#8
Senior Member
True Car Nut
Tony, first of all, your trans temps are just fine, you don't need to get nervous about them until they start climbing over 200 degrees F. I've never owned a p/u with the 6.0l but a little research tells me in your application maximum torque isn't reached until 4200 rpm which to my thinking is a bit high but that'* where you want to be when towing a heavy load up a grade.
Rev=3.064:1
1st=4.027:1
2nd=2.364:1
3rd=1.532:1
4th=1.152:1
5th=0.852:1
6th=0.667:1
. . . so yes two OD ratios but no direct 1:1 .
Garageroj, your 350 was probably like my LT9: 160HP @ 3800RPM and 250lbft @ 2800RPM . . . and if I'm right tmbsierrahd has an LY6: 361HP @ 5600RPM and 385lbft @ 4400 . . . so 135lbft more at 1600RPM higher, so garageroj is pretty close. Point here is the 6.0 needs to rev higher to make even its low-end torque.
I'd say let it do its thing in tow/haul and call it good. Unless you are in a hurry that is worth thousands of dollars and a great deal of tinkering to get it all right. These transmissions are really smart these days.
Not trying to rain on any parades, but a supercharger would likely lead to more issues in the long run.
- M6 is like drive, all gears available but you can change your mind by pressing the little button without moving the lever first
- M5 allows it to shift through gears 1-5 as it desires
- M4 allows it to shift through gears 1-4 as it desires
- etc.
Hope this helps! Feel free to ask more.
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