Tuning Results and dyno graphs

[tricache]

We were actually unsure of the fuel type as the customer had literally just purchased the car from a car yard, modified it then drove to ChipTorque for a tune. The fuel was from the car yard, so I would think that would mean it's unlikely that'd be 98 octane.

Leah @ CT

Jeez yet again I wish I had that much money

[ChipTorque]

Why does this Gen 2 MPS3 dyno fall off so much after 5500 rpm compared to the other MPS3 or MPS6 dyno?

I would say it's due to air flow restrictions. Probably the first step to improve would be an exhaust upgrade, we haven't seen this mod on a Gen 2 as yet so it would be interesting to see how it improves the top end power.

[Nuliaj]

I would say it's due to air flow restrictions. Probably the first step to improve would be an exhaust upgrade, we haven't seen this mod on a Gen 2 as yet so it would be interesting to see how it improves the top end power.

In post #31 you have a dyno of a Gen 2 with only an air filter, BPV and xede that doesn't experience that problem. Considering the other dyno had a SRI, you would imagine the SRI one would run better.

[ChipTorque]

The boost drops off in the top end of the vehicle with the CES SRI due to leaving the mixtures slightly richer, as this is our mail order base tune and needs to be safe. The other vehicle has a custom tune for that car. The way the XEDE works is by manipulating the input signals into the std PCM. The XEDE controls fuel requirements on an MPS via modifying the MAF(Mass airflow signal). On your vehicles this has four effects:
· Changing the AFR mixture
· Increasing or decreasing timing due to the PCM receiving a lower or higher load signals
· Increasing or decreasing throttle opening due to the internal torque calculation of the PCM
· Increasing or decreasing boost due to the internal torque calculation of the PCM

In the majority of cars we reduce the MAF signal to lean the mixtures and increase the timing. At the same time because the PCM believes there is less airflow it will increase its main torque variables (throttle angle and boost) hence the difference between the two cars.

Hope this helps
Cheers Rob

[2XS]

WOW, so much involved in tuning a modern car.

I remember the days when it was fuel and timing that where the only things to worry about.

[Cosmic3MPS]

Why does this Gen 2 MPS3 dyno fall off so much after 5500 rpm compared to the other MPS3 or MPS6 dyno?

Given that this is an Xede tune only I would have thought the issue would be the throttle plate closing down at 5500 rpm. The graph shape looks fairly typical where there is no TP control.You can clearly see the difference in the graph showing where CT has done the flash tune. See my last graph from a Gen 1 MPS:

Dyno.pdf

[Nuliaj]

That was kinda what I was thinking too.

[esp22]

Have there been any better readings for an mps6??195kw+??Thanks

[ChipTorque]

Given that this is an Xede tune only I would have thought the issue would be the throttle plate closing down at 5500 rpm. The graph shape looks fairly typical where there is no TP control.You can clearly see the difference in the graph showing where CT has done the flash tune. See my last graph from a Gen 1 MPS:

Dyno.pdf

The question asked was replied on the perspective of comparing a late model 3 MPS with and without an SRI (that is how we understood it). Both vehicle's were tuned with an XEDE so they will both be experiencing the throttle plate closing.

Leah @ CT

[ChipTorque]

Have there been any better readings for an mps6??195kw+??Thanks

This is the most power we have seen from a 6 MPS. This was tuned with the XEDE Processor