92 corvette tuning tips and questions.

[BlackW1dow]

Good afternoon,

I hope yall might be willing to help me.. I'm currently trying to tune my 92 corvette, and am struggling tuning out code 26 after doing a AIR and EGR delete. I'm using $DA2 as the definition file, but it doesn't show to have any flags to toggle for any codes except for VATS. I could tune out the EGR by setting all the values to max for the EGR scalers, but cant seem to crack the code 26.. Any help is greatly appreciated.

[2xls1]

Post your bin file.

[BlackW1dow]

Here is the bin file for the 1992 vette.

[NomakeWan]

Here is the bin file for the 1992 vette.

That's your XDF, not your BIN. Your BIN is your actual tune, the thing that you're putting on the chip/Ostrich/Romulator/etc.

But if that's your XDF, then there's your problem. Please use a proper XDF from here and you'll find it has the flags you seek: http://gearhead-efi.com/Fuel-Injecti...ll=1#post29337

[BlackW1dow]

That's your XDF, not your BIN. Your BIN is your actual tune, the thing that you're putting on the chip/Ostrich/Romulator/etc.

But if that's your XDF, then there's your problem. Please use a proper XDF from here and you'll find it has the flags you seek: http://gearhead-efi.com/Fuel-Injecti...ll=1#post29337

God Bless you, this is exactly what I was looking for. I downloaded the XDF from tuner pro and was confused at how little it allowed me to tune. I ordered the adapter to actually pull the bin from the factory chip and it should be at door by Friday. I will attempt tuning it out with this XDF as a starting point and update yall on where I get.

[BlackW1dow]

Good news, I was able to tune out the EGR and code 26 from my 92 vette. now i have another question. What all do the companies change when they say they can send a custom chip to gain 10-15HP? how do they do that without datalogging?

after i datalog what are my first steps to tune? is the ultimate goal to get the BLM to 128? Theres soo many scalers and tables that are able to be changed but i would think a sorta simple tune would only require changing a few things like VE tables, Spark Advance, and fan temp turnon.

Thank you greatly for the help on finding the right XDF.

[NomakeWan]

Good news, I was able to tune out the EGR and code 26 from my 92 vette. now i have another question. What all do the companies change when they say they can send a custom chip to gain 10-15HP? how do they do that without datalogging?

after i datalog what are my first steps to tune? is the ultimate goal to get the BLM to 128? Theres soo many scalers and tables that are able to be changed but i would think a sorta simple tune would only require changing a few things like VE tables, Spark Advance, and fan temp turnon.

Thank you greatly for the help on finding the right XDF.

Woohoo! Glad to hear you're sorted. Yeah, the XDFs available directly from TunerPro are woefully out of date compared to those created by the community here.

Anyway, the "magic sauce" that legitimate companies (like pcmforless) charge for are tweaks to ignition timing and fuel maps based on their experience with others who have had similar work done in the past. Since they have experience with several similar vehicles, they can create an "average" improvement that should work for any other similar vehicle. It won't be as nice as a tune with proper datalogging, but if your vehicle falls within the specifications of one that the company has experience with, you should still be able to see some improvement.

Hypertech is not a legitimate company, so just ignore them.

Tuning on these older ECMs is a little more involved than newer ones, and I don't have direct experience with your ECM specifically, so I can't walk you through every single step. But in general, you'd want to adjust fuel to get the BLMs to 128, yes. If you feel spicy you can then start tweaking ignition timing, but you'll want to be sure to keep track of knock counts and all that. There'll be a falloff point where adding timing doesn't actually net you a benefit, not to mention it'll make you more prone to knock, so start slow.

Hopefully some others with more experience with the '278 can chime in here. For general tuning-related stuff though, plenty of folks around here should be able to help, and there are entire online courses that are applicable to all engines (though the actual nitty-gritty of how to log the data, make adjustments, and apply them to your specific ECM are not covered). Good luck, have fun!