ECU tuning question

Has anybody had any experience altering the factory fuel, ignition and boost settings via the actual ECU?

I see a lot of support for the Unichip, but I'm interested in modifying fuel, ignition and boost maps without resorting to a piggyback device or stand-alone engine management.

Does the factory ECU have a removeable EPROM? If not, can it be modified with a socket to accept a removeable EPROM chip? Does anybody make such a chip? Or has anyone had any luck in just straight up hacking the ECU?

Any help would be greatly appreciated.

-Noah
 
An ECU was sent to Flyin' Miata a few years ago to be hacked. It was sent back a year later w/ a note that said "don't hold your breathe." Goodluck trying, but Mazda spent A LOT of time encrypting their software. No one has cracked it yet.
 
the only way to change the settings on the ECU is with a WDS setup, and with only the WDS machine you can only change the timing (advance/retard), to change the fuel mix you would need whatever software mazda uses and the WDS.
 
Well I PMed him, so maybe we'll find out. Returning to the other part of my original question though, if the PROM can't be hacked so the factory maps can be adjusted, is it possible to remove the chip, socket the board and replace it with a whole new chip? If so, has anybody made a chip for this purpose, or would I have to burn my own?
 
not sure,because it is the same basic ECU as the ford focus,and JET has been all up in that one for a few years.
so if anyone can do it,I think JET can.

the problem though is JET is not a very good tuning company.good at cracking,not tuning.
 
Nope, the EECV board can't be "re-chiped." Jetchip has has results with Ford vehicles using the EECV because they've broken Ford's software encryption, which is obviously a lot easier than Mazda's code.

You're gonna spend alot of time and possibly money to gain the same results you can readily buy from various vendors on this site. Not worth the effort IMO. Its been pursued before, and nothing was accomplished.
 
For a race effort, it could be worth it. Piggybacks are just an inherently sloppy solution. And standalone EMS is not allowed under the rules I'm playing by. That means modifying the ECU.

And why would it be necessary to break the software encryption to re-chip the board? At that point, wouldn't you be supplying a whole new set of maps on a custom burned PROM, not relying on Mazda's maps as a starting point?
 
wannaBgroupB said:
For a race effort, it could be worth it. Piggybacks are just an inherently sloppy solution. And standalone EMS is not allowed under the rules I'm playing by. That means modifying the ECU.

And why would it be necessary to break the software encryption to re-chip the board? At that point, wouldn't you be supplying a whole new set of maps on a custom burned PROM, not relying on Mazda's maps as a starting point?

you have to have mazda's codes,because the codes are what the EEPROM is written in.the ECU won't understand anything else other than mazda.
 
Vancouver_MSP said:
The Jet chip invovled sending the ecu to them and having them program it for the specific mods being done to the vehicle, it was mazdaspeed specific and a half hour phone conversation was had with a tech before they set it up, seems to work great. As far as the n20 goes thats kinda what i figured, have seen plenty of people pop their motors around 12 lbs but handt heard anything about people using juice, better safe than sorry, just throwin it out there.

From his post.
 
wannaBgroupB said:
and ustcc is the rulebook I'm concerned with.
I'm not familiar with their rules. Can you link me to a set of rules, or maybe just tell me what you have to stick to and I'd be able to help you out.
 
http://www.ustcc.com/pdf_doc/USTCC_2005_rules.pdf

I've been speaking with one of their administrators about classing the car, and I'll likely be allowed a small boost increase. I'll also want to modify fuel and ignition curves. It seems to me, reading the rules, that only piggyback controllers or a modified factory ECU are allowed. No standalone. Any help or advice would be appreciated.
 

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