Turbo system

[03Z33]

I'm happy to see you working on this. I'll be in the market for something like this shortly.
Regarding the MAF signal, what I usually see people do is one of the following:

1. Reprogram ECU to accept higher volage input (usually not possible on newer cars)

2. Oversize MAF housing to reduce air velocity (requires retune of ECU or piggyback to recalibrate for the new lower signal inputs)

3. Install resistor in-line between MAF and ECU on signal wire to recalibrate the maximum voltage to the ECU (this also requires recalibrating the ECU software for the different signal, or a piggyback to adjust).

4. Clamp MAF signal to max voltage ECU likes. This will usually benefit from a retune also.

5. Install any one of many piggy-back options which will adaptively do the above for you by constantly monitoring and adapting the different signals the ECU is depending on. This sometimes doesn't work well due to the adaptive nature of the stock ECU, which sometimes "undoes" the corrections the piggy-back is trying to implement.

6. Or you can always dump the MAF all together and convert to MAP, by either reprograming the ECU to accept MAP signals/voltages instead of MAF signal or by dumping the stock ECU all together and running a stand alone ECU.

[Nutzoids]

I am not 100% sure… but so far the only difference I have found between a Turbo kit for the xA/xB and the Yaris has been… the Intercooler on the Yaris needs to be a little bit thinner… 3” in thickness, as opposed to the Scion 4”… I think the tubing has all the same bends too… But that is the last thing I need to research, and admittedly it is much harder… Short of buying both kits and checking it out for shits and giggles… And I am way to poor for that… Plus I don’t think our Venders want us knowing that either way!

Did anyone else compare the 2 on that link????

[DTM_Yaris]

Originally Posted by Nutzoids

I am not 100% sure… but so far the only difference I have found between a Turbo kit for the xA/xB and the Yaris has been… the Intercooler on the Yaris needs to be a little bit thinner… 3” in thickness, as opposed to the Scion 4”… I think the tubing has all the same bends too… But that is the last thing I need to research, and admittedly it is much harder… Short of buying both kits and checking it out for shits and giggles… And I am way to poor for that… Plus I don’t think our Venders want us knowing that either way!

Did anyone else compare the 2 on that link????

They are different in many ways. The intercooler piping will not bolt up whatsoever, the downpipes will not bolt up tot he Yaris cat, midpipe, ETC.
The only good thing about these kits is the fact that they have a nice turbo manifold that is reliable.

[DTM_Yaris]

Originally Posted by 03Z33

I'm happy to see you working on this. I'll be in the market for something like this shortly.
Regarding the MAF signal, what I usually see people do is one of the following:

1. Reprogram ECU to accept higher volage input (usually not possible on newer cars)

2. Oversize MAF housing to reduce air velocity (requires retune of ECU or piggyback to recalibrate for the new lower signal inputs)

3. Install resistor in-line between MAF and ECU on signal wire to recalibrate the maximum voltage to the ECU (this also requires recalibrating the ECU software for the different signal, or a piggyback to adjust).

4. Clamp MAF signal to max voltage ECU likes. This will usually benefit from a retune also.

5. Install any one of many piggy-back options which will adaptively do the above for you by constantly monitoring and adapting the different signals the ECU is depending on. This sometimes doesn't work well due to the adaptive nature of the stock ECU, which sometimes "undoes" the corrections the piggy-back is trying to implement.

6. Or you can always dump the MAF all together and convert to MAP, by either reprograming the ECU to accept MAP signals/voltages instead of MAF signal or by dumping the stock ECU all together and running a stand alone ECU.

1.Unfortunately reflashing or reprogramming interface is unavailable at this time.

2.Unfortunately reflashing or reprogramming interface is unavailable at this time.

3.Unfortunately reflashing or reprogramming interface is unavailable at this time.

4.The problem with this, like I mention above, is that the ecu will look at preprogrammed values. They will not be in line with the amount of airflow it would see N/A with a certain throttle voltage and air temp. It will think the MAF is bad. Now not while the car is just daily driving, Just when under boost when it counts!

5.The problem with many piggybacks is also the fact that there aren't that many outputs. they usually will allow 256 point adjustments for (1) 0-5 volt analog input. Some will do 02 feedback manipulation, BUT they only work well on older ECU's. Not the CANBUS system we see in the Toyotas and many OEM applications.

6.Unfortunately reflashing or reprogramming interface is unavailable at this time.