HP Tuners..er.....tuners?

Epsilon Plus · August 22, 2020

Most of the tuning threads on this forum are either about canned tunes, send out/get back ECM canned tunes, or early (2014-2018) threads where posters were freaking out about warranty this and warranty that.

Well, a lot of our warranties are up so......

I've been screwing around with HP Tuners (left over from my hotrod days). So far have disabled AFM, dialed the speedo in closer to my current tire height, and right now I'm playing with fan logic for my 174F thermo install tomorrow. My goal is increased towing performance (mostly by keeping the temps down). Have a 7700lb max travel trailer OTW and don't feel like rocking 240F temps up grades. Lump me in with the crowd that is high temperature averse and believes the stock inferno is purely CAFE related. I have no desire to make the truck "faster" or anything WOT related really. After playing with LS1s, LS2s and LS3s the thought of using a 5500lb 4x4 crew cab to smash around town like a squirrel seems akin to using a fork for a screw driver.

Anyone else here play around in there? Gen V is definitely more complicated than the Gen III/IV stuff I've been playing with before. No surprise. Anything HP Tuners related has always been a big shrouded mystery with ghost and barely answered posts on their home forum and guys in the know desperately clinging to their knowledge so they don't lost their side gig gravy train of tuning local cars.

I think next up if the fans agree with me I'll work on part throttle response and maybe back down some torque management and see if that improves response. Again, I have no desire to snap the transfer case chain by slamming a WOT no TM 1>2 shift but some more pep in the throttle for the mild around town stuff would be nice.

Cheers.

CamGTP · August 23, 2020

I've been using HP Tuners for 8 or 9 years now. Done lots of helping with these trucks and the older ones too.

Post up your current tune if you want and I can tell you some simple changes to make. I will say though I haven't done much with the cooling fan logic yet but done just about everything else.

Epsilon Plus · August 23, 2020

4 hours ago, CamGTP said:

I've been using HP Tuners for 8 or 9 years now. Done lots of helping with these trucks and the older ones too.

Post up your current tune if you want and I can tell you some simple changes to make. I will say though I haven't done much with the cooling fan logic yet but done just about everything else.

Very mild so far. Just turning stuff off. The fans can be tricky at first, but I think I understand from my LS2 days. "State 1 ECT gets to X fan turns to stage 1 (whatever you have it at), ECT gets to X then this happens". I've modified the axis as I don't like 192 or 194 whatever it is being the lowest so I wonder if that's taken hold. I don't remember having the capability to do that in my LS days.

Haven't done any logging yet, just plugged the tune in.

It's weird coming from LS stuff to this and trying to learn where the limits might be. I've seen on this forum "oh the 6L80E will die if you take out TM". In the muscle car area, the 6L80E is a beast. I have to remind myself that I'm dealing with a 5500lb+ portly piece of metal with a transfer case and a fragile front drive train. A lot different than a 3900lb 5th Gen Camaro.

Silverado 2.0.hpt

carkhz316 · August 23, 2020

Following

Eddie 70 · August 23, 2020

I've had HP Tuners since about 2006-07 time frame. I tuned my 1970 ls swapped Corvette. I got the driving down the road pretty good and the car runs great. Never could get the cold start squared up like it should be. Heck I don't even have the software on my newest laptop. The interface and wideband sensor are in a storage bin in the garage.

I had wondered if anyone was using HP on these trucks.

CamGTP · August 24, 2020

Download my file and save it. Then open your file and then mine with the compare feature.

My truck is a 2016 and I have a different tire size that you so some tables are going to obviously different because of that and because there are minors changes in the calibration itself because of the different years and newer OS I have.

I want you to focus on the Power enrichment settings and timing changes.

For the transmission look at the shift pressures for upshift and the adaptives. Then look at the shift timing torque adder section. The torque adder table is how fast the shift time is more or less. You will see that I upped the shift pressures slightly and lowered the shift times for a faster/cleaner shift.

I personally have the torque converter disabled for gears 1-4 but I'll leave that up to you. And I raise the mph settings for lock up in 5th and 6th gears. I don't like the factory settings so I did it that way.

This is important with pressure and adaptive pressure changes. You must reset the adapts so that the changes take. After you flash the tune open the VCM scanner and connect to the truck. Go to the special functions icon and find the transmission section. Click reset and then preset on the adapts and then start the truck. The first few times it shifts through the gears it's going to kinda feel lurchy as it relearns everything but it calms down pretty quick.

This tune is about 8 month old and I've done some since then but the stuff in here should make that truck feel a whole lot different. It's the simple things that do more than you think.

2016 Silverado engine+trans11.hpt

Edited August 24, 2020 by CamGTP

flyingfool · August 26, 2020

On 8/23/2020 at 6:10 PM, CamGTP said:

For the transmission look at the shift pressures for upshift and the adaptives. Then look at the shift timing torque adder section. The torque adder table is how fast the shift time is more or less. You will see that I upped the shift pressures slightly and lowered the shift times for a faster/cleaner shift.

I personally have the torque converter disabled for gears 1-4 but I'll leave that up to you. And I raise the mph settings for lock up in 5th and 6th gears. I don't like the factory settings so I did it that way.

This is important with pressure and adaptive pressure changes. You must reset the adapts so that the changes take. After you flash the tune open the VCM scanner and connect to the truck. Go to the special functions icon and find the transmission section. Click reset and then preset on the adapts and then start the truck. The first few times it shifts through the gears it's going to kinda feel lurchy as it relearns everything but it calms down pretty quick.

This tune is about 8 month old and I've done some since then but the stuff in here should make that truck feel a whole lot different. It's the simple things that do more than you think.

2016 Silverado engine+trans11.hpt 2.11 MB · 2 downloads

are you able to do a trans re-learn proceedure via HPTuners?

CamGTP · August 26, 2020

Never tried it to be honest.

Epsilon Plus · August 26, 2020

On 8/23/2020 at 6:10 PM, CamGTP said:

Download my file and save it. Then open your file and then mine with the compare feature.

My truck is a 2016 and I have a different tire size that you so some tables are going to obviously different because of that and because there are minors changes in the calibration itself because of the different years and newer OS I have.

I want you to focus on the Power enrichment settings and timing changes.

For the transmission look at the shift pressures for upshift and the adaptives. Then look at the shift timing torque adder section. The torque adder table is how fast the shift time is more or less. You will see that I upped the shift pressures slightly and lowered the shift times for a faster/cleaner shift.

I personally have the torque converter disabled for gears 1-4 but I'll leave that up to you. And I raise the mph settings for lock up in 5th and 6th gears. I don't like the factory settings so I did it that way.

This is important with pressure and adaptive pressure changes. You must reset the adapts so that the changes take. After you flash the tune open the VCM scanner and connect to the truck. Go to the special functions icon and find the transmission section. Click reset and then preset on the adapts and then start the truck. The first few times it shifts through the gears it's going to kinda feel lurchy as it relearns everything but it calms down pretty quick.

This tune is about 8 month old and I've done some since then but the stuff in here should make that truck feel a whole lot different. It's the simple things that do more than you think.

2016 Silverado engine+trans11.hpt 2.11 MB · 4 downloads

Thanks mang.

Did you use smoothing, percentage +/-, or trial and error to come up with your shift and pressure variances? I like the TCC theory and values you have in there already.

Wouldn't the VCM control reset do the same for the trans re-learn?

Cheers.

flyingfool · August 26, 2020

I want to do a trans re-learn but I hate buying more gadjets like a VCM, I was hoping HPT could do it, but probably not.. I know there is a manual way to do it if you have the shop manual, but it's very involved proceedure without a hardware tool

Edited August 26, 2020 by flyingfool

Epsilon Plus · August 26, 2020

21 minutes ago, flyingfool said:

I want to do a trans re-learn but I hate buying more gadjets like a VCM, I was hoping HPT could do it, but probably not.. I know there is a manual way to do it if you have the shop manual, but it's very involved proceedure without a hardware tool

VCM controls are part of HP Tuners Scanner app. If you have HPT, you have it.

flyingfool · August 26, 2020

problem is i have the older cable style HPT, not the newer bluetooth model

Epsilon Plus · August 26, 2020

45 minutes ago, flyingfool said:

problem is i have the older cable style HPT, not the newer bluetooth model

So do I. First gen MPVI. Plug it in and open the scanner. Look for the vehicle controls and options button. Get the latest release here: https://www.hptuners.com/downloads/

Edited August 26, 2020 by Epsilon Plus

CamGTP · August 26, 2020

Sometimes I smooth the tables, sometimes I don't. The transmission does some of the work for you anyway because we aren't able to set exact values for every single foot pound of torque or vehicle speed. The computer is going to look at the values in the calibration and interpolate between values to use what is best.

Everything I do is pretty much trial and error. At this point I generally know where I can go with most vehicles and I make small changes past that if I need to.

Edited August 26, 2020 by CamGTP