Cylinder pressure to TDC system
Posted: Thu Dec 02, 2021 4:02 am
Just a placeholder, will add info tomorrow when we build it.
Problem: Harley does not divulge ANY information, and majority of people working with them are pretty... Empty minded.
Pickup ring is built into crank, which is completely blocked out from the world. Only reason we have info is because we have a open motor, and was able to do some basic math to calculate TDC offset. Which also appeared to be off by 10-20 degrees in the retarded direction. Calculating TDC without a timing light or cam sensor, proves to be difficult.
Idea: Simon from UK has had a great idea of using cylinder pressure as a close approximation of TDC. Use a pressure sensor, stick into spark plug hole and see Pressure peak, and use rusEFI to show difference between timing.
Problem 2: I WANT IT DONE NOOOOOOOW! So have to work with whatever I can get asap, found a pressure sensor from a ford GDI as per Matt's & Simon's suggestion.
Solution: Gonna use compression tester tube, fabricate an adapter to it on a lathe, and attach Fuel pressure sensor into it. Wire it up to proteus, and get matt to either do some magical programming to make it show the peaks, or two just look at logs and see offset.
Will add pictures as we start work on it tomorrow.
Sensor: https://partsavatar.ca/2013-2018-ford-focus-new-pressure-sensor-bosch-0261545038?gclid=Cj0KCQiA15yNBhDTARIsAGnwe0WJtMWaU_Itn2K7ZXlHvRHZkZ1aXO6vvDiKCqz-MLAzK_ybK9f4ZgsaArabEALw_wcB
m10x1 45 degree flare
Compression tester: https://www.amazon.ca/Petrol-Engine-Compression-Automotives-Motorcycles/dp/B07BKWPPDR/ref=asc_df_B07BKWPPDR/?tag=googleshopc0c-20&linkCode=df0&hvadid=335224436156&hvpos=&hvnetw=g&hvrand=3046944275065435222&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1001920&hvtargid=pla-467133934297&psc=1
Adapter: Will upload when it is created
Problem: Harley does not divulge ANY information, and majority of people working with them are pretty... Empty minded.
Pickup ring is built into crank, which is completely blocked out from the world. Only reason we have info is because we have a open motor, and was able to do some basic math to calculate TDC offset. Which also appeared to be off by 10-20 degrees in the retarded direction. Calculating TDC without a timing light or cam sensor, proves to be difficult.
Idea: Simon from UK has had a great idea of using cylinder pressure as a close approximation of TDC. Use a pressure sensor, stick into spark plug hole and see Pressure peak, and use rusEFI to show difference between timing.
Problem 2: I WANT IT DONE NOOOOOOOW! So have to work with whatever I can get asap, found a pressure sensor from a ford GDI as per Matt's & Simon's suggestion.
Solution: Gonna use compression tester tube, fabricate an adapter to it on a lathe, and attach Fuel pressure sensor into it. Wire it up to proteus, and get matt to either do some magical programming to make it show the peaks, or two just look at logs and see offset.
Will add pictures as we start work on it tomorrow.
Sensor: https://partsavatar.ca/2013-2018-ford-focus-new-pressure-sensor-bosch-0261545038?gclid=Cj0KCQiA15yNBhDTARIsAGnwe0WJtMWaU_Itn2K7ZXlHvRHZkZ1aXO6vvDiKCqz-MLAzK_ybK9f4ZgsaArabEALw_wcB
m10x1 45 degree flare
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Adapter: Will upload when it is created
