Hp tuning

You are talking about factory software, since that’s what you need to make the changes.

 

Are you talking about just uploading programs to the ECM or actually making custom programs yourself?

99% sure you need the manufacturer's software to reflash the ECM. As to actually making custom files, I can't help you there. That's something beyond what I do on a daily basis.

 

I don't know that you can tune any of the heavy duty engines without the factory software. They've got them pretty locked up.

 

Making GOOD tunes is huge undertaking sir............Without your own dyno its nearly impossible

 

Lots of shops will rent theirs out for time blocks or even days for the right amount of money.

 

Gotcha Yeah that will work too Alls im sayin is doing good tunes is more then knowing how to change numbers in calibrations

 

That's all you're doing on a CAT file. You adjust the trim settings and injector codes. You just do it repeatedly after each dyno run until you like the results. Nobody is actually editing the files literally with a hex editor.

 

There are people who claim to be able to, they're never willing to show and tell though.

 

Don't forget you'd need a test engine or test truck. Be prepared for it to go Ka-pow! if you adjust something too far.