Quote:
Originally Posted by Krakert
Hello everybody!
I'm new to this forum and have some questions about tuning a 2.0 911E engine.
My dad and I are currently working on our friend's car, a '69 2.0 911E which was originally fitted with mechanical fuel injection. However, the mechanical system proved to be quite challenging to tune as it would run poorly when tuned for cold starts and vice versa. So, I suggested transitioning to a standalone ECU. In this case, we opted for a RusEFI / FOME Proteus ECU.
We endeavored to maintain as much of the original setup as possible. We mounted a Triumph Daytona 675 throttle body with a custom 3D-printed intake manifold to the original air filter housing.
We managed to get the car running and driving some time ago. However, last week when I fired the car back up, it was running excessively rich (9-11 AFR). It's worth noting that the air temperature was about 10°C lower than the last time it ran. Despite my efforts, I couldn't get it running smoothly until the oil temperature reached at least 50°C.
I would appreciate hearing from others here about their experiences with idle tuning and dealing with temperature changes. I've heard that Individual Throttle Bodies (ITBs) can be a bit tricky to tune for idle.
Due to the ITBs, I'm currently running Speed Density with TSP override. This decision was made because the MAP values are around 70 kPa at idle, which is less than ideal.
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Krakert......I'm not familiar with the Rus/EFI Proteus, but it looks like TunerStudio is used .....have you been data-logging? If so...email me a copy of your logfile (capturing the cold start up through the temp rise when the oil reaches 50C) I can review it to see what your AFRs are during the cold start and how your tuning transitions from cold start thru warm running. As you know there are several cold start fueling steps....Prime,crank, After-Start, Warm-up......
I would also recommend that you verify that the ITBs air-flow is still balanced and that the temp sensor, map sensor etc are all working properly....
regards,
al
PS: PM me for my email address...or go to my website (
www.x-faktory.com) to contact me via email.....