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This atsv was making some serious power and the customer decided to go e85. We upgraded the low pressure fuel pump and then added a 30% over fuel lobe cam swap.
I modified the axis of the leading edge angle and the trailing edge +30% however after the cam swap it opens the waste gates and wont exceed 6psiAttachment 101991. Is there more tables to adjust for the cam lobe? I've attached the tune as well.
post log
With the LPFP upgrade and fuel cam, the ATS-V will still be limited to approximately E47 fuel. Beyond that, there won't be enough fuel system volume.
Please use the attached channels configuration file and get a new data scan. This will show all the parameters necessary to help me help you diagnose the issue. I also included a very nice layout file, that will help you see what you need to see for proper ATS-V tuning.
Hey thanks for your help on setting up the VCM Scanner. I've attached the new data log with the provided layouts and channels. Attachment 102038
Quote:
Originally Posted by Tapout Tuning
First, you are running 60% ethanol content. The stock fuel system can only handle about 10% with the boost turned up. When you upgrade the LPFP and add the fuel cam, you increase fuel system capacity by approximately 25%, and the system can then support up to approximately E47. However, at E60, the fuel system will not be able to keep up with demand.
Second, see how the manifold air temperature (MAT) stays pegged at 173 degrees throughout the pull? This tell us the intercooler isn't working at all. It's pretty common for these cars to need to have the intercooler systems filled and bled. On a related note, you have the intercooler protection table pegged. This table is designed to protect the engine in case of intercooler failure. I strongly recommend reducing the portions above 154 degrees.
Third, you are commanding all the wastegate duty cycle, and the ECM continues to increase it's command throughout the pull. However, as you noted, the boost never raises above to 6 to 8 psi. The wastegates on these cars are controlled by vacuum so most likely there is a vacuum hose that was left unplugged. I have $20 that says it's the on the passenger side, at the top rear of the intake manifold. Plug that in and your boost will magically reappear. However, I strongly recommend against going WOT on this car right now for the two reasons listed above.
Here is the game plan I would recommend. Get the ethanol out of the tank. Fill and bleed the intercooler system. Resolve the vacuum leak in the boost control circuit. Tune the car on gasoline. Enable flex fuel and tune for E30. Then fine tune at E47. I can assist with any of these steps, and can be contacted directly at [email protected].
Well you were right about the vacuum line! It looked plugged in however with a slight tug it we discovered it wasn't pressed in. We got the boost back and got the ethanol reduced down to about e30. I've attached an updated log and I definitely enjoy the critique. We're purging the intercooler now to bring those temps down and we should be all set. Thanks for the help!Attachment 102039