Dave: Thanks again. The 1994 Suburban with big block 489 cuin Edelbrock MPFI conversion is running very well. It needs a little tweaking for some of the rich and lean conditions yet they are not...

Thanks much for the reply. Don't want to mess with the chip except when using TunerPro.

Rolly

Hey Guys, need help in modifying XDF file for $31. Would like to expand columns from 11 to 16. See attached image file. Also made a test drive to record BLMs. See attached .xls file. Rick in...

Dave: Now I have confidence with the binary file and attached XDF and ADX files. Many thanks to you and the other fellows that chimed in. Attached is a graphic of the Injector Fuel Flow Scalars. ...

Again, you guys are AWESOME. Thank ever so much for the attached files. Lesson learned.

Rolly

You guys as AWESOME. Thanks for the reply.

Rolly

Again, you guys are AWESOME! Thank VERY much for the attached files. Exactly what was needed

Rolly

You guys are awesome. Thanks for the reply.

Rolly

Man, cannot thank you enough for your education on chip ID's and XDF files. Did not give this aspect any thought. Now it is burned in my memory. Must keep in mind that XDF files decode the binary...

Dave: Thanks very much for the reply. I will try that .bin file. Not sure what the attached .JPEG file is to represent. The attached image file is what was gleaned from the MPFI Modified $31...

Yes I have limited experience. Right now a converted 350 Vortec with 454 TBI, adapter, modified 4 barrel manifold on an engine stand with somewhat tuned 7427 ECU. Using early build APU1 and 27SF512...

Understand. The description in the LH column is different than what is presented in TunerPro for the four letter code in the 16197427 ECU. It is really difficult to get the confidence that...

TOM: Do you have a binary file for 489 or 502 big block that works in a 16197427 ECU? Did you do the upgrades to Edelbrock TBI to MPFI injection? Please advise. Thanks.

Rolly

Dave:


After looking at your .PDF files and looking at binaries in TunerPro RT, the PDF files have a Constant column, whereas TunerPro has Scalars, Flags and Tables. Don't understand the PDF file...

Dave:

After looking at your .PDF files and looking at binaries in TunerPro RT, the PDF files have a Constant column, whereas TunerPro has Scalars, Flags and Tables. Don't understand the PDF file...

Dave:

Please expand on "Tuning can include changing some of the injector values seen in the spreadsheet". Which injector values may have to be changed?

Dave:

Thanks much for the reply. At first blush, changing constants, flags does not appear to be that difficult. The aspect that is not understood is "...Tuning can include changing some of the...

Dave:

Have you used this process in the past? Has it worked sucessfully other than having to tune the VE fuel map? Please advise. Thanks.

Dave:

Thanks much for the response. Now that it is better understood, I will attempt to change the .bin file using the three posted .pdf tables. Will start with original 454 .bin file and modify...

Dave:


In your attached JPEG file, there are five changes to the FLAGS. Is this the complete extent of the changes that need to be made? What was the table formed from? Was it from the HP Tuners...

Dave:

In your attached JPEG file, there are five changes to the FLAGS. Is this the complete extent of the changes that need to be made? What was the table formed from? Was it from the HP Tuners...

Dave:

That attached jpeg file has greatly added to an understanding of the conversion. Kept wondering what that table was keyed to. Now I know. Enlightening stuff. Thanks ever so much.

Rolly

Dave:

The most important question is, WHAT in the .bin file was changed for MPFI?
Attached is my binary file for 1995 C1500 350 TBI 7427 0D BJYM. Found the constants for MPFI and TBI lb/hr...

Dave:

When going from 2nd DRP to 4th DRP on the SBC engines, was it necessary to adjust fuel pressure or change injectors to a different size? Still seems like it would try to run very lean if...

Dave:

1) Trying to understand the MPFI Definitions v4_0x and how to interpret or make sense of them.
2) When going from 2nd DRP to 4th DRP with the same VE fuel map, that should yield half the...