Help with Hex Editing

[Scuba_Steve]

I'm just messing around with TunerPro, trying to learn the ropes. I understand most of what I am doing, but am a bit unclear on a few points.

Question 1

Rev Limit = 3750000 / X

Such that X is the decimal value of the two bytes at 727A and 727B.

How do I convert the number I come up with to hex? Obviously there are 3 numbers used in the rpm, and 2 bytes to represent them. But each byte has 256 digits possible...

Question 2

Does anyone know how to calculate the byte used for injector size?


Question 3

Check my work please.

Stock Injector deadtime
A9 58 30 23 1B 17 13

216 Injector deadtime
B2 61 39 2c 24 20 1C

Also when changing deadtime, do you simply round to the nearest whole number?
deadtime/24=whole number

Thanks!

 

[donniekak]

If you are using tuner pro all of those values can be edited in the xdf without using the hex editor. The only things you need the hex editor for are for non stock features like studderbox and knock sum gauge, etc.

 

[cbrfrenzie]

Also, the calculator on your computer will do it for you! If you dont know where that is, go to your start->run and type in "calc".

Go to the "view" menu and choose "scientific". Make sure you have the "Dec" radio button selected, type in your decimal #, then click the "Hex" radio button and BOOM!!!! I'm a programmer, so the windows calculator is my best friend!

 

[Scuba_Steve]

I just figured that I would like to learn how this is all working to an extent, so I didn't want to just use the TunerPro interface. Plus I would like to implement some of the more advanced features. I obviously needed to learn how to convert to hex to get proper stutter box rev settings.

BTW the calculator works GREAT! I have never left the Dec setting before, never made it past college algebra. Thank you very much.

Now on to figuring out the CEL shift gauge, boost knock gauge, and phantom knock delete...