Not many people using HPT to tune Duramax?

[TwoFast4Lv]

I was wondering how many here are activly tuning Duramaxs with HPT? HPT Is one of the many software packages we use and it seemed like a logical choice at the time to try it for the shop truck but there does not seem to be many people working with it or learning with it?

I see alot of info with the other software, which I am not excited about, but almost none with HPT?

What gives?

[popeye55]

i was wondering the same question, efi live has alot going on with them, i have not used it with the durmax yet, but i have a friend that wants to. any onfo would be great

[alanderson1978]

I'm working on a few. I'm waiting for time to install PLX EGT and boost sensors to really get going on it. I've got one guy who doesn't use his D-max as a daily driver he wants to go all out. Seems like most daily drivers are happy with a simple 'canned' tune to gain some economy and change tire size. HPT is one of the newest Duramax tuners around, so it's going to have a pretty small base until folks are convinced of it's potential.

[Bill@HPTuners]

HPT entered the market about 7 months too late...efilive has a grasp on the market and they know it which is why their pricing structure is nearly 3x as much as hpt for all LB7 & LLY...basically it seems EFILive gave up on the LS1 market knowing they got stomped in that market & have tried to move on.

[TwoFast4Lv]

Alright then lets get this rolling

anyone got a good file for scanning? anyone look into the strange DTC issue yet?

[JuniorCruzer]

I have some basic stuff right now. I am going to be getting my tranny built here in a couple months, and then it is time to learn and really turn up the power.

I think that you will see more and more folks tuning with it and using it more come summer.

Jon

[alanderson1978]

anyone got a good file for scanning? anyone look into the strange DTC issue yet?

What DTC issue on what year?
Not that I could help, but I haven't run across it yet and would like to keep it in my pocket if it comes up.

[TwoFast4Lv]

What DTC issue on what year?
Not that I could help, but I haven't run across it yet and would like to keep it in my pocket if it comes up.

I can not give exact codes at the moment as the truck is in the shop.

What happens is when I check the DTCs there are 20 or so of them that come up. when I clear them they come right back. I know they are fake because I plug in my standard shop scanner and check with Global and vin specific and all is well.

I would also like to setup a cfg file to check diesel basics with the analog inputs being used for a Pyro I am assuming the factory MAP should be fine to track boost

BTW This would be for the 03 GMC CCSB shop truck

[marky_24]

i have used it, and works great, was able to get enough power to limp the trans with in about 5-7 different tunes. i found it to be a very easy learning curve, ya just need to know what does what and the basics and away ya go.

[JuniorCruzer]

wanna help out with the what does what part so that I can learn the basics? LOL

Jon

[TwoFast4Lv]

Ok some more information on the codes. To many to count every time I check for them and if I clear them more then twice I loose communications with the truck.

anyone else?

[marky_24]

well some of this may or may not make sense i just copyed and paste everything i had saved in my basics folder, things i got from here and http://www.dieselplace.com/forum/index.php

It was your 3-step program I employed in a pinch, even though one of the 3 changes I couldn't really figure out the why for, but it all seemed to work great and will buy me some time so I can dig deeper into these glowplugs, heck after seeing how easy it was to turn up the wick it looks like my new truck next year will have to be a Duramax, hopefully by then they will have an update to allow tuning of LBZ's ( I'm still working keeping LB7/LLY/LBZ straight). Glad to see you are a member here, so I can pester you a bit. Not sure if you tune Fords, but I can return the favor on blue oval tuning, if you ever have a question about them, poly not, but keep it in mind.

here is what I did, 3 easy steps in the McRat plan:

1.) I fooled the VCM by increasing the Main Inj PW & Main (no pilot) by 20% to trick into thinking it had larger injectors, I will put this back to stock when I tackle reshaping the Base Fuel tables, but for now I hacked it up a little. The steps I followed only talked about 2 tables but HPT sees three. What is the Pilot PW for? I couldn't figure out if one was the Performance profile or what, I may have to add 20% there too but I wanted to understand their relationship better and when which is used and why.

2.) I bumped the base injector timing by copying the high altitude table (base baro low) with higher GM mapped timings to the medium and high barometric tables. Seemed like that would be safe and the truck sounded 100% normal when he goes WOT.

3.) **NOTE** The following trick only applies to the LLY motor, not the LB7 Waste-gated motor I was working on (always helps to know what your working on) so I put it back to stock after realizing it wasn't what I needed to do. The hack to make 20% more boost on a LLY is to removed 20% from the desired boost max calibration table above 1000rpm and smooth the transition. The goal was not to mess with idle and very low load, only when there is real boost. I believe the idea is to fool the VCM into thinking there is less boost then there is, so it continues to make more, even beyond the factory limits but forget this if you have a LB7 and be happy with the first two hacks, they will make a noticable improvement.

those hacks will screw up your mileage calcs and the boost logs will report 20% less boost, so I think it was topping out around 23.5 psi (reading 19.5) but that is basically what most piggy back tuners do and they screw up some of the same stuff. I did find out that most people agree that you can go up to 25psi without much risk, so I felt 23 was not to aggresive. I also upped the TQ max and modified his non-Tow trani profile to shift 10% faster but left the GM Tow trani stuff alone until I can dig into the pressures maps and shift points. The owner said it was running a lot stronger, like night and day so he will do some real world testing and report back. I rode along and logged what I could find that made sense but there seems to be some pids missing, is there going to be a new version of the Scanner coming out? Do LLY's and LBZ's have factory EGT's or is that something that has to be added? I couldn't find a downstream IAT listed anywhere either, kinda odd for an intercooled boost system.

I am not a hack tuner, I really dislike the hacks but sometimes you just need to get the ball rolling. I did everything the right way on my Cobra and it is a monster and it seems after a couple of street pulls and 3 track passes I have a solid flat safe 13.0 race tune for my new peppy SS that sees a full 28.5* at 6K doing it all the right way. I'm not sure if I will be able to resist re-tuning this first 01 LB7 Duramax the right way once I learn a little more, but I might get the urge. The line of guys wanting their trucks just gets longer so I'll have other chances. Diesels seem to have a lot less to deal with actually, but maybe we are not seeing all the tables yet in this version, dunno but at least my glowplug cherry has been busted and the owner was beside himself.

Diesel and gas have similar lambda’s of 14.6 but does AFR have no role to play at WOT for diesel tuning, just keep pouring the fuel in and hope your MAF and VE tables are properly calibrated? I know EGT gives you indirect info about how lean you are, but how do you calibrate the MAF without some feedback, do you need an EGT? I see in the scanner where you can add a user defined EGT, but didn't see a VCM GM pid for it? I logged Main vs Pilot PW, InjTime and Fuel, but only InjTime shows the Pilot jumping up higher than main during initial load and that was with/without the Tow mode being on, so that made me think it has some other purpose, just I don't know what exactly and the help file was a little light for these new PIDs.

Well I attached the diffs, the scanner config I slapped together in a hurry and a log file and would be very open to suggestions as to what to add to scan or what the logs might hold, everything commanded is close to the actual for the few pids available to scan.

Thanks to everybody for the help and hope I can return the favor, somehow, somewhere. I uploaded the 2001 stock Duramax tune if anybody else wants to poke around in there.

A Few Basics to keep in mind.
More fuel equals more power but more heat.
Boost cools a Diesel and supports the fueling to keep EGT in check.
1350 Pre turbo EGT is Safe MAX.
More timing increases cylinder pressure and lowers EGT but slows Turbo response and increases NOX emissions.
Tune using EGT and tail pipe emissions, contrary to popular belief you don't want to see any smoke under power maybe a little on initial tip in of the throttle.
If you increase fuel you must balance it with more boost/air.

2001-2004 - LB7: IHI Charger, waste-gated, hidden injectors, first gen ECM.
2004.5-2005 - LLY: Garrett VNT charger, exposed injectors, 2nd gen ECM.
2006-2007 - (fake LLY) LBZ: Garrett VNT, exposed injectors, no ICM, 3rd gen ECM.

Start by adding a little pulse width in the main injection pw table be sure to leave idle Parameters alone. 0-70mpa; 0-30mm3. start off with a peak of 2000ms. Try to keep the rail psi around 20-22,000

Kick some timing in on the correct timing table. To find out which one is correct change the one closest to your baro-press.

Start your new timing curve at 1800rpm around 9 degrees of timing. Change the values in 90-110mm3. Increase your timing 1.5 degrees per column up to 3400. Then flaten the table out. After you created your timing curve blend the rest.

Adjust throttle base injection quantity @ 100% throttle to be 110mm3 from 2200rpm to 3200rpm.

I can't give it all away but I can get you going in the right direction.

Be careful how much power you put to a stock trans.

[TwoFast4Lv]

I have most every thing at DP is the other software good stuff when you can break it down to HPT

[02 WS6 TA]

HPT entered the market about 7 months too late...efilive has a grasp on the market and they know it which is why their pricing structure is nearly 3x as much as hpt for all LB7 & LLY...basically it seems EFILive gave up on the LS1 market knowing they got stomped in that market & have tried to move on.

You hit that nail on the head! I don't want to say that over at DP, but I was thinking it!

[atver300]

2002 WS6 M6
2000 Camaro SS M6
2002 Z-28 A4
1998 Tahoe LT
1987 454 R2500 Suburban- Teh Bus
1996 Impala SS
1980 ElCamino
13HP Generator, Undisclosed N2O Shot.
2006 D-Max/Allison 3500 Dually

I recognize that list from over at DP
I recently purchased Hp tuners to tune my V8 S10 and will probally start looking into my duramx real soon

[04snake]

I'm reading this post and was like I recognize that wordy basturds directions...

wait a minute!

Yeah I was the one who posted the "McRat" plan I got from that other site on this site. I never tuned a diesel before, 1/2 dozen late model muscle cars, but no diesels and crammed like I was taking a final the night before I worked on that guys 01 truck. I asked him what motor was in it (LLY or LB7), big mistake because he really didn't know but after getting the truck back and undoing that one un-needed tweak, that bitch turned into a monster. He is the brother in-law of a friend who own a garage and he just uses the truck as a truck but he hauls a lot of heavy trailers and is still happy as a pig in poop. He even brags to his buddies about his better mileage (calculated with pen and paper at the pump), so when I asked him if he wanted me to re-tune it in the more traditional way, he said why in the heck would I want to do that, it runs too good, and passed on my offer!

I guess a blind chicken can even find a piece of corn, now and then.

We are planning on doing my buddies 06 LBZ as soon as they release the version with support and we are going to do that the right way, install EGT sensors and a boost gauge, hopefully this spring.

I'm not sure why you would even consider EFI-Live, it is all right here and it works like a champ! Just imagine what you could do if you went to school and actually master the glow plug! Cruise all the forums, gather the concepts and then this software is real easy to translate all what you learn into a functioning tune, then help out and share what you learn with us here and then this forum will be up to speed like some of the ones that got a temporary head start!

Remember, friends don’t let friends drive crappy tunes!

[marky_24]

I'm reading this post and was like I recognize that wordy basturds directions...

wait a minute!

are you referring to me??? maybe you should read what i put. i just copied and paste everything i had saved from here and over at dp, never said i came up with it or anything just the basics i had

[04snake]

are you referring to me??? maybe you should read what i put. i just copied and paste everything i had saved from here and over at dp, never said i came up with it or anything just the basics i had

No I am 100% glad you did!

Lets be fair here I lifted it from McRat and gave him 100% credit and he still said something to me, no problem he didn't notice where I did but it was always there! I actually read into it bit before I figured out where it came from, heck no share on!!!

that's my point and then we will have a good resource of diesel knowledge here, it just made me giggle because I had a brain fert and smacked my forehead like the "i could'a had a V8 commercial"!

when I realized where it came from! LOL!

[02 WS6 TA]

2002 WS6 M6
2000 Camaro SS M6
2002 Z-28 A4
1998 Tahoe LT
1987 454 R2500 Suburban- Teh Bus
1996 Impala SS
1980 ElCamino
13HP Generator, Undisclosed N2O Shot.
2006 D-Max/Allison 3500 Dually

I recognize that list from over at DP
I recently purchased Hp tuners to tune my V8 S10 and will probally start looking into my duramx real soon

Hahahaha, yep, thats me. HPT Rules!