I recently switched from the AEM to Pro EFI, and thought I would provide some initial feedback. I purchased the Pro EFI mainly due to wanting to run E85 and not having to adjust the tune each time I filled up the tank. It also was cheaper than the Motec and I thought it would give me better features than the AEM V2. Not to mention, my AEM CDI died and AEM discontinued it, so I liked the idea of not running wasted spark.
Learning curve on the Pro EFI definitely a bit longer than the AEM, so make sure you read up if you plan to tune your self. I've tuned several cars and I still found the Pro EFI a bit challenging. Even though there is a lot of documentation, I found there to be a lack of explanation of some of the attributes you could tweak, and a lot was trial & error.
I found that even base maps sent by tuners aren't 100% - so make sure you check everything over. As an an example, the base tune I bought did not have knock sensors configured correctly, so the ECU disabled knock control from the start.
Also - even though I plugged in my RPM limiter in the software config, the computer was not enforcing it until you add a rule in the fault manager to cut spark when over rev limit condition occurs. You would think a base map would have that, but it didn't.
Could have ended badly if I over-revved the engine.
Once the calibration is set up properly, I found drivability to be that of the AEM (I had hours of fine tuning in my AEM map so my AEM car drove better than stock). Cold start is equivalent - fires up the first time hot or cold. More importantly, the Pro EFI forces you to wire in fuel pressure, which proved to be valuable later on.
I find the logging capability of the Pro EFI do not be as good as the AEM. While you can log more variables, and have better logging options (for a lot of extra money to purchase an external logger), I am disappointed that the Pro EFI does not offer internal logging built in, or an in-expensive logging option w/out a laptop. Sometimes it is nice to pull the last few pulls you did without having a computer hooked up all the time.
Also, the logging software is a bit different than the AEM. You cannot re-scale certain variables and easily view min/max values. I spend on average more time reviewing Pro EFI logs than I did with the AEM.
But one of the many benefits of a Pro EFI is you do not need to constantly monitor the logs once you get the tune right. The computer automatically handles mixture between pump gas and E85. Also, the ECU protected my motor when my fuel pressure started dropping under boost. Because you can have full control over your check engine light, I have my check engine light triggered when injector duty reaches 99%. On a few E85 pulls at ~27psi, my check engine light went on so I connected the laptop to read the code - turns out the injector duty hit 99%. I cleared the code and then did a log to reproduce the issue - turns out that FP was dropping.
Attached is a log at a different time on low boost, showing FP drop (dark purple line). You can see the A/Fs maintained with the target, due to the Pro EFI automatically compensating for the drop in FP. I wish I had injectory duty logged, you would be able to see that increasing. The check engine light caused me to stop doing pulls and quickly realize I have a fuel issue under boost. As it turns out, my 10 micron aeromotive fuel filter was clogged and needs to be replaced with an E85-compatible one. If I still was on the AEM, who knows how long it would have taken me to realize this problem, and it could have cost me a motor.
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I had a chance to play with the traction control and while it certainty cannot keep my car under control from a dig or on a higher boost 2nd gear pull, it does an excellent job whenever timing reduction can reduce torque enough to stop the tires from spinning. This usually ends up being 3rd gear on 25+ psi for my street tires. I have some video / logs demonstrating traction control that I can post up soon.
If the Supra had electronic throttle, we could control the throttle butterfly with excessive wheel speed. Maybe there is a way to run an output to the stock supra traction control butterfly to accomplish something similar?
Overall, I am happy with the Pro EFI and would recommend it to anyone. There is a good community out there using it for Supra's and finding tuning options is not much of a problem.
Learning curve on the Pro EFI definitely a bit longer than the AEM, so make sure you read up if you plan to tune your self. I've tuned several cars and I still found the Pro EFI a bit challenging. Even though there is a lot of documentation, I found there to be a lack of explanation of some of the attributes you could tweak, and a lot was trial & error.
I found that even base maps sent by tuners aren't 100% - so make sure you check everything over. As an an example, the base tune I bought did not have knock sensors configured correctly, so the ECU disabled knock control from the start.
Also - even though I plugged in my RPM limiter in the software config, the computer was not enforcing it until you add a rule in the fault manager to cut spark when over rev limit condition occurs. You would think a base map would have that, but it didn't.
Could have ended badly if I over-revved the engine.
Once the calibration is set up properly, I found drivability to be that of the AEM (I had hours of fine tuning in my AEM map so my AEM car drove better than stock). Cold start is equivalent - fires up the first time hot or cold. More importantly, the Pro EFI forces you to wire in fuel pressure, which proved to be valuable later on.
I find the logging capability of the Pro EFI do not be as good as the AEM. While you can log more variables, and have better logging options (for a lot of extra money to purchase an external logger), I am disappointed that the Pro EFI does not offer internal logging built in, or an in-expensive logging option w/out a laptop. Sometimes it is nice to pull the last few pulls you did without having a computer hooked up all the time.
Also, the logging software is a bit different than the AEM. You cannot re-scale certain variables and easily view min/max values. I spend on average more time reviewing Pro EFI logs than I did with the AEM.
But one of the many benefits of a Pro EFI is you do not need to constantly monitor the logs once you get the tune right. The computer automatically handles mixture between pump gas and E85. Also, the ECU protected my motor when my fuel pressure started dropping under boost. Because you can have full control over your check engine light, I have my check engine light triggered when injector duty reaches 99%. On a few E85 pulls at ~27psi, my check engine light went on so I connected the laptop to read the code - turns out the injector duty hit 99%. I cleared the code and then did a log to reproduce the issue - turns out that FP was dropping.
Attached is a log at a different time on low boost, showing FP drop (dark purple line). You can see the A/Fs maintained with the target, due to the Pro EFI automatically compensating for the drop in FP. I wish I had injectory duty logged, you would be able to see that increasing. The check engine light caused me to stop doing pulls and quickly realize I have a fuel issue under boost. As it turns out, my 10 micron aeromotive fuel filter was clogged and needs to be replaced with an E85-compatible one. If I still was on the AEM, who knows how long it would have taken me to realize this problem, and it could have cost me a motor.
I had a chance to play with the traction control and while it certainty cannot keep my car under control from a dig or on a higher boost 2nd gear pull, it does an excellent job whenever timing reduction can reduce torque enough to stop the tires from spinning. This usually ends up being 3rd gear on 25+ psi for my street tires. I have some video / logs demonstrating traction control that I can post up soon.
If the Supra had electronic throttle, we could control the throttle butterfly with excessive wheel speed. Maybe there is a way to run an output to the stock supra traction control butterfly to accomplish something similar?
Overall, I am happy with the Pro EFI and would recommend it to anyone. There is a good community out there using it for Supra's and finding tuning options is not much of a problem.
