GM's 6L80 HP Tuning, DoD, and Torque Converters! Part 1 of 3
Автокөліктер мен көлік құралдары
This is the first part of a three part series covering GM's Displacement on Demand, which is also called Active Fuel Management, and later called Dynamic Fuel Management. In this video, I disassemble a 6.2L LT1 and demonstrate the operation of the DoD. I use pressure transducers to show how much pressure is necessary to activate the DoD lifters and I also show in-cylinder pressures while activating and deactivating the lifters. I also share some information on why the DoD is causing symptoms with vehicles when DoD activates at slow speeds. This can ultimately cause transmission issues. I use a home-made vibration analyzer with an oscilloscope to demonstrate this vibration issue during a test drive. Here is the link to the video showing you how to make that sensor yourself: • Vibration Analyzer for...
Part two covers the torque converter in these 6L80s and how they are prone to failing. This is the link for part two: • GM's 6L80 HP Tuning, D...
Part three covers the HP Tuners segment of this three-part series. The link to that video is here: • GM's 6L80 HP Tuning, D...
Пікірлер: 31
What a shame that such an informative video has so few views and under 275 "likes" after two years. You've earned another subscriber!
Very informative! Thanks for the video!
It’s awesome that SIU is finally utilizing HP Tuners.
@siuautomotive
3 жыл бұрын
I might need you and AJ to help as a featured guest! Lol
This is the most informative video about DOD , thank you very much for the great content
Awesome teacher.... I went to Automotive school got my associate's a long time ago been wrenching for 18 years anyway I bought my first GM and I hate this DOD love the VVT just ordered HP tuners. Very useful information in this everyone needs to watch it if they're working on GM vehicles. Thank you for making this video.
Bought a range technology, mishimoto transmission cooler, oil catch can and the sure cool kit.. Temps never go over 150 degrees after long hour drives... will be doing complete dod delete, swap torque converter and tune down the road for sure... 14 6l80.. awesome vid.
I work at a dealer, yes the chip shortage is real. And yes we changed slot of window stickers showing mpg
Thanks Sean just about ready to venture into this area
@siuautomotive
3 жыл бұрын
Your welcome Gary. Hey, I keep forgetting to take a picture of that holding fixture. I'll try to remember tomorrow!
Thank you for these videos!!!. Bought a '16 L83 silverado. Didn't realize the level of vibration V4 mode causes until after I swapped out the BFG KO2's. The tires were masking the vibration at in-town speeds. Vibration is much worse when its cold though, ill generally run it in M5 untill it get to temp.
Is there a option to only have dod engage at a higher gear or speed ? If so what approach would you take?
Shawn, I have a 2008 Escalade RWD with the 6.2. I am replacing the engine due to excessive piston slap. I'm installing a 430 hp GM crate LS3. I currently have no problems with the original transmission (145,000 miles). Would you recommend replacing the torque converter with an upgraded (billet backing plate) unit as a preventative measure? What brand torque converter would you put in this truck if it were yours?
After transmission 6L80 we have a ringing sound now. Any idea from what? 5.3/ BTR cam Tuning on 87.
Thank you for making this video. What’s your thoughts on just using a Range Technology dongle to disable 4 cylinder mode?
@siuautomotive
3 жыл бұрын
I've never use one, but I would think it would be okay.
@jeromeburrasca6710
3 жыл бұрын
siu automotive I’ve spoken to their tech department and they claim as long as you unplug it before smog inspection (California) the vehicle will pass inspection, which is not the case with simply disabling DOD with a tune alone.
@20tea
3 жыл бұрын
DOD is ingenious, but really a bad idea in the long term. Best to delete it when you get the chance! Really just a way to meet emission standards and promote 'fuel efficiency' from a v8. Honestly, just better off with a v6 in that case.
@googuser3145
3 жыл бұрын
@@20tea I think DOD is great as well, but the single greatest upgrade to smallblocks is direct injection. And compared to german OEM's the HPFP's and injectors are decently priced. Im a huge fan of 5th gen smallblocks in general.
@20tea
3 жыл бұрын
@@googuser3145 True, just keep in mind the additional carbon buildup in the ports and valves. All direct injection vehicles should have an oil catch can to reduce carbon buildup.
Do 8L90s need adjustments made with HP Tuners?
@siuautomotive
2 жыл бұрын
Many will tune the TCC so it doesn’t engage in 1-4th gears. Also, many set the slip speed to zero.
I would give anything to pay you to train me.. i run a transmission shop in VA and just got hptuners to help with our units. I would love to get with you and pay you to train me!
Can deleting the tcc from engaging in 1-4 get rid of a shutter from 1st to 2nd at low rpm
@siuautomotive
2 жыл бұрын
Probably not unless the tcc is still engaged during the shift and the source of the shutter is the tcc.
@jayP3rezLT
Жыл бұрын
Did you ever fix shudder?
@FLbowtieguy
Жыл бұрын
@@jayP3rezLT i ended up getting a new torque converter and a shift kit put in adm it helped but still has small amount of shutter
I too have to "Wish" those style injectors outta the head.
DoD is a joke. I lost 2 mpg after a rebuild and dod delete
@ridingwiththereids
11 ай бұрын
I'll agree that it's a joke. I used HP Tuners to turn it off on my 2018 Chevy 1500 5.3, a long with some line pressure and TCC changes and actually gained 2-3mpg.