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Would love to see some updates to the software :)

It's really starting to show its age and I'm having to do a ton of post-processing to my data files in python to get the data I want. But then...

Engine surge is typically due to the cam. In my experience, playing with timing, fuel, and if those are dialed in, eoit will affect surging.

I've got a 468 CI LS7 in my C5 now a d found that it...

I'll bump this too. I have a few scripts where I do some binary modifications and to keep these in my HPT tune it's a slow and annoying process of

1) Read .bin from ECU with separate tool
2)...

If you get ahold of that tune, please let us know when you upload. there are currently 0 2019+ ECUs for sierra/silverados on the repository.

I wanted to look and see how they set up torque...

Take a look at this how to I made a few years ago. https://forum.hptuners.com/showthread.php?51807-How-to-Startup-Airflow-and-AC-Airflow-Table-Tweaking


Also, datalog with the at least following...

So I don't normally drive with the AC on while the car is warming up. Tried it today. Turned car on and started driving. Stit was damn near 0 at idle but once I started moving, the car would...

Good to know. Can you specify where the table lives for completeness?

I take it no one else sees anything obvious either. Shame.

Hey all,
I've been street tuning this thing for a while now. It's a relatively mild/baby cam in a 416 stroker. I've got fuel pretty well dialed in. In the log attached, I turned on the MAF again,...

That's the wideband start up sequence. It warms up for 20 seconds and has a fixed output for specific times so you can calibrate easily. Then it shows measured output. You'll see the narrow bands...

I can't do that because then I run even more rich at hot idle, which causes surging until STFT trim it out. Plus I'd have to add 20% more fuel.

At temp the VE is fine. When cold the VE is off

Hello all,
I've got a 416 CI LS3 swapped into my C5Z. I street tuned it and have it pretty well dialed in when ECT is at operating temperature. The issue I'm having is that if I disable the MAF and...

This is a tricky one unfortunately. I've been playing around with transient tuning myself, and it is NOT easy. I spent hours doing trial and error...

It looks like you adjust some KPA rows...

Running very rich tends to make the engine oscillate.

I'm on ID725s in my C5 and had to copy their fuel tables exactly, but transient can also come into affect. Double check and make sure you've...

Thanks for taking the time to make those observations!

I'll give it a go and see if there's any noticable.

As a note, in the version of the tune I had sent, I actually played with the friction...

Hmmm so he doesn't have the stock tune because someone modified things.

It's from a 2000 Sierra 1500. Guess we can look at a tune from the repository. But keep in mind this tune has the 2 bar...

Welp. Just deleted this long post by accident. Damn phone.

So I was at an autocross event yesterday and was having issues with it starting for runs when I let it sit with the hood closed. I...

For a 90, you can generally get away with stock values I noticed. There is a certain degree of error you can bake into the other idle parameters, but I found with the 102, it was just too much error...

Sorry. Guess I should've been more specific with my build.

It's a new stroker 416 LS3 build in my C5 Z.

I'll have to try the leak down test with the injectors. That thought had crossed my...

I don't have a log of pw. Lemme try to gather that.

I don't think I had changes those. Perhaps they're stock C5 Z values?

And earwax, ETC scalar is right. No P/N because it's a manual C5 Z....

Hey guys,

I'm trying to figure this issue out...

My car cold starts great. It warm starts great as well, as long as I start it within 5 minutes of turning it off...

As soon as it sits for 20...

Interesting. I'm running the stock 6.2L flex fuel truck injectors.

I have similar spring pressures too.

I need to play with it more. But yeah it feels like a snail when it pulls 10*....

Hmmm. Guess we can try that next. Does the SES enabled have to be checked? We tried both but didn't see a difference

Very interesting. I'm having a similar issue. New engine. On the engine dyno it took 30* at wot before knocking. So we estimate it'll take about 26* in the car.

When I do wot pulls, the car maxes...

Any one have a clue? Hptuners staff? Do you know? The help file doesn't say anything about what the state of the maf sensors should be in their SD custom os