CZ:

I have been keeping up with your Kit, looks and sounds awesome.

My only question is to clarify how it works.
Basically, I want to know..
Does it control the A/F ratios directly (replacing whatever the ECU does) or does it tweek the Fuel amounts (either by tricking the stock ECU or by reducing the outputs from the ECU).

The reason I ask is my only concern is. What happens if Mazda reflashes the stock ECU to a leaner A/F ratio? Will that have no effect on your A/F ratios (and be safe) or would it cause the A/F ratios to be too lean (in the case were you are just leaning out whatever the stock ECU does.)

I am sure that you might have mentioned this before, but there is a lot of Posts to search through.

Thanks
Rick

I think that the CZ unit overides the stock fuel curve over about 5000RPM- so if mazda changed thiers- you would still be using CZ's ratios.- No problem there if they ever change the ECU- the problem is they probably can't- have to protect the cats with a rich mixture for EPA purposes. I don't think there is anyon other way for MAzda to accomplish this except with a high temp cat- which I'm sure they cant' and won't replace- Maybe on the '06 model????

Originally posted by emailists
I think that the CZ unit overides the stock fuel curve over about 5000RPM- so if mazda changed thiers- you would still be using CZ's ratios.- No problem there if they ever change the ECU- the problem is they probably can't- have to protect the cats with a rich mixture for EPA purposes. I don't think there is anyon other way for MAzda to accomplish this except with a high temp cat- which I'm sure they cant' and won't replace- Maybe on the '06 model???? Mazda can do this and should! they advertised that they reduced H.P. to 238 which it isn't, more like 220-225 H.P. due to EPA concerns, Mazda never advertised that that the MPG would be significantly reduced due to the richer condition, and they certainly didn't forsee the flooding prone problem. Even if it was not economically feasible for Mazda to develop a high heat resistant catylitic converter, they could still restore the original ECU program(250 H.P.) and replace the cat if it went bad on and as needed basis! Lucky for us Canzoomer developed a piggyback unit to restore what was lost and we can get it now! The unit would still operate safely even if Mazda reflashed the Air/fuel, it wouldn't deviate to a leaner more dangerous condition, it would stay within it's programed air/fuel target. I think Maurice mentioned he would have a change if Mazda decided to do a air/fuel reflash?

Originally posted by JimW
Mazda can do this and should! Can't, and won't! ;)

Mazda never advertised that that the MPG would be significantly reduced due to the richer condition

The rated mileage probably has not changed due to the ECU remap - the EPA economy tests never get into the high rpm and full throttle ranges where the ECU map was richened!

they could still restore the original ECU program(250 H.P.) and replace the cat if it went bad on and as needed basis!

No, they could NOT - the legal requirement is that the original cat last for 120K miles, not that they replace any that go bad before 120K. The EPA rule is very specific to the life of the original cat - what you suggest is simply not an option for Mazda, they are not allowed to plan for that type of replacement scenario.

Regards,
Gordon

After reading what seems like hundreds of pages on Canzoomers chip I'm pretty sure I have a handle on what it does. It works very much like a SAFC by ApexI. It intercepts the MAF sensor output and changes it by a percentage based on RPM. This leans or richens the fuel mixture by making the ECU think it has more or less air coming to it. So if they do re-flash the ECU your curve will still be altered by a percentage. So if they did for some reason change the fuel curve to be the 250 hp curve you would have problems. Esp if they leaned out the mixture.

No i am pretty sure what the chip does is that it intercepts mazda's signal, reads the rpm amount, and sends out its own independant signal based soley on the rpms, w/ simple if thens. Like if rpms below 5k, send in mazdas signal, if rpms >5k and <7k use this a/f ratio, so basically it intercepts mazda's signal neway so it doesn't matter if the signal changes cause it is still being completely intercepted.

Hmmm...I'm not so sure about this. There are a lot of other factors besides RPM that go into determining the amount of fuel to use. I doubt the Stage 1 is smart enough to redo all of that ECU work.

jds

I know it is more complex, there are things like the O2 sensor and the altitude and other things. First of all it doesn't come close to redoing all of the ECU work, like working the lights, etc. But it does manage all of the fuel/air ratios independantly using the altitude and other factors to compute its own independant, not based on percentage, air/fuel ratio. It doesn't have 2 redo a lot of it. The O2 sensor values and the altitude can just b taken from the ECU and stage 1 uses that data to help compute its signal.

I was under the impression it worked similar to an E-Manage where it was simply modifying the injector pulse width by a percentage. I highly doubt Mazda will ever change the fuel maps on any cars it has sold thus far so do not consider this as a problem or an issue.

Building a whole new map is a lot of work and does require a lot of inputs. I would be interested to know now for sure.

Canzoomer?

we can complain about Mazda's advertised HP and MPG numbers being high all we want. Mazda is legally bound to use the numbers they get in EPA testing. Many Mfgs have complained that they'd like to advertise lower numbers, but are not allowed too. When the advertising rules were written, it was assumed that ALL Mfgs were essentially dishonest and would lie through their teeth if allowed the oportunity. Now they are forced to use numbers most people will never achieve.