EnginerdVT

I'm learning a lot and now I'm genuinely interested in how to really evaluate the tune. My tune right now is purely MAF from what I now understand. Too end runs great but it bucks more than it should and I think a hybrid is the right call. I really need to get HPT and learn how to look at things and maybe even tweak it since I'll spend countless seat time in it.

Indepth

This is due to the fact that the car is 'hybrid tuned' from the factory and when a tuner only tunes the MAF the VVE tables are left untouched.

VVE tables are used below a certain RPM range when cruising. MAF is used typically at WOT or in other words above a certain RPM. (This is how it's been explained to me and explained on the HPT Forums.)

HPT is not cheap but it is a great thing to have. I'm still learning and have a lot to go but I was victim to the stereotypical "MAF only" tune from a local tuning shop on my first go around. I've since found a tuner that knows the in's and out's and has no problem with me tearing apart his tune and asking him questions about it.

Dan_the_C5_Man

Nah, one better - Dashlogic FTW. I also run the WB full time, so I see real-time Lambda - nothing hides from me, just a paranoid control freak I guess.

Indepth

I'm just as bad as you, I didn't realize you could utilize Dashlogic for that. I might have to look into this. I've been paranoid and thinking about wiring up an WB setup myself - control freak checking in here as well.

Dan_the_C5_Man

I can send you my DL config file, answer any questions about my setup, glad to help.

EnginerdVT

What does dash logic do for you with regard monitoring that's so beneficial?

Indepth

Typically, with HPTuners you'd need to have your interface module connected to your OBDII port with your laptop up and running for a live data scan.

By the sound of it, you can utilize Dashlogic (a little dongle that plugs into your OBDII port) to record data and certain specified parameters based on a config file you can load into it.

Dan, I'll shoot you a PM later this evening. I'm interested in hearing more.

0Chuck CoW

We (US TOONERS) like to keep the MAF in play just for the reasons you mentioned....

As the environmental changes occur.... A MAF car will tolerate the changes better.

Edelbrock and many other companies that distribute starter tunes with their products will ONLY MAF tune the car.

Guys with big cams or intake systems (which can easily vary from car to car even having the EXACT same parts)

that (for instance) place the blow off valves in different locations, will have trouble tuning the MAF as

reversion and other flow characteristics change making it impossible to get a stable MAF curve built.

Speed Density tuning will typically benefit you on bigger builds especially like when using the EFI LIVE

(FREE) custom 1,2, or 3 BAR SD custom operating systems.

Why don't us tuners do it every time? Because some people would cry about an 8-$1,000+ tune and every time

you touch the car.....the tune could change significantly.... Requiring re-tune.

The MAF calibration is one single table (1 row wide) by many cells long. The GM VE table is MANY rows by MANY columns making it

much more time consuming and tedious to get it working right and if there is a need to adjust the tune....It's

LOTS of time so SD tuning costs much more than MAF tuning.

There are very good reasons to use each type and YES, you can make 1200+ with a MAF. Same with VE

Each vehicle will come in with different mods and we typically try to MAF tune everything, but along the way

sometimes you will see variances that just make it impossible to finish the job using the MAF... So, it's turns into a SD tune.

The other reason..... LARGE INJECTORS (maf and also injector limits) ESPECIALLY when the vehicle is an A6 or A8 car.....

Then the SD tune makes sense because MAF tunes that require scaling or giant injectors will usually wreak havoc with the

automatic transmissions forcing you to switch up to SD...

Both have their place and MOST vehicles run fantastic with MAF only tunes..... There's no real right/wrong answer.

Most often basic bolt on 8psi supercharger kits work fine in MAF and most other more complicated builds dictate SD.

Chuck CoW

Dan_the_C5_Man

No data storage on the DL, just real-time monitoring (I have several pages built out to display on the HUD, as well as the IP display).

If you have the pro version of the HPT module, that one can data log w/o a laptop (it's a small buffer, but still useful, especially if you don't want a laptop rolling around in the car).

Indepth

Let me tell you, trying to do WOT pulls with a laptop in the passenger seat by yourself and keep an eye on data is challenging to say the least!

Dashlogic allows you to make custom HUD displays? Hmmmm. This is getting closer and closer to the top of the "need" list.

I have the software and a borrowed HPTuners interface right now (it isn't the pro). But I'll be buying the pro version so the included interface can allow analog (WB) inputs.

0Chuck CoW

While the HPTuners is very popular.... You might consider the EFI LIVE AutoCal or V2 as there are really no

reasonable limits to what you can record into the device as it has removable SD cards.

It's what I prefer to use and the new V8 software is AWESOME.

Chuck CoW

EBuckC6

Chuck can you check your pm please?

Eric

EnginerdVT

I was digging back into the newer ECU swap and comparing wiring pin-outs from GM data... Looks like the ECU listed for what is in my 2008 Z06 is only 1 pin off from the one listed for the 2010 Z06 ECU.

Is there something that says this is MUCH harder than it looks?

0Chuck CoW

So, what are we trying to do here? Why are we talking about 2010 ECMs in 2008 cars???

They are different and not interchangable.

I have tons of them. Call me if you need help.

Chuck CoW

EnginerdVT

This is the same discussion as before in trying to get the new ecm capability of larger injector tables and such for an older car (in my case an 08) to avoid scaling and loosing adjustability with larger injectors to run 1000+ whp with e85. I realize people have made it work with scaled tables but was trying to avoid that if possible and going aftermarket ecm is not worth it to me. I have heard that you can repin the harness to support a newer ecm.

Michael_D

I installed a 2010 E38 in my 2008 Z06. No re-pin. Call Dave Steck. He'll hook you up. You will have to perform a clutch learn and a couple other small things, but it's not an onerous task by any means.

Let me know if there are any tables you would like a screenshot of to see if they might fit your needs.

EnginerdVT

Michael, this is what I figured seeing how similar the pinouts were. Can you confirm that you don't have the same limitations in the injector tables as before? If so I'm very interested in this. Please pm me your info if you're willing to discuss and I will also try and contact Dave.

Michael_D

2010 max IFR is 127 lb/hr.

EnginerdVT

Perfect. I'd love the information. Thank you for your help. I want to swap the ecm in.

Michael_D

PM me your email. I'll send you my file and you can use the HPT compare function to see all the different tables.

I did it so I could get more tables for tweaking the O2 sensors, but it does have other benefits as well. (you will need to download the beta HPT).