talseg560
11-27-2016, 10:28 AM
Hey guys, this is basically a hail Mary since I've searched up and down the internet for an answer, but here goes:
So my team uses a two cylinder 500cc engine, Yamaha T max 500 (2007).
Among the many problems I've had figuring out the unknowns of this engine, the toughest so far has been finding the base OEM ignition, fuel and VE maps (since it uses speed density air modeling). So here is the deal:
I want replace our current ECU setup (piggyback powercommander III attached to the original engine ECU) with a standalone ECU. The thing is, to do that, I sort of need to have a base map to start from (and I've tried searching for it to no avail). Failing that, I'll have to set conservative timing for ignition, Fuel map of basically Lambda = 1 across the board, and VE table set with a single starting value for the whole table. Also, I won't be able to touch the engine until I can get it to a dyno and start tuning from there.
I guess my question is, How did you guys deal with installing a new, standalone ECU on your engine? Did you have the OEM base maps? If so, where did you find them? If not, what was your process? Did you do what I've written above, or was it different?
My second issue is finding the TDC offset to put in the ECU settings. I don't a timing light around at the moment, so I was wondering if there is a different way to find TDC offset without using a timing light. I've had a few ideas already, but unfortunately all of them fail because they require knowing exactly where the index tooth is (that is, it's zero crossing on the signal). Not to mention the loss of accuracy of doing it without a timing light. So basically, do you have any basic ideas on how to find TDC offset without a Timing light? (I'm afraid this question might be too general).
Thanks for whoever answers. The TDC offset thing is less of an issue, but the OEM base maps really have me stuck, seeing as I don't want to start the engine with a bad map, to have it destroy the engine.
Apologies if my questions are too general
So my team uses a two cylinder 500cc engine, Yamaha T max 500 (2007).
Among the many problems I've had figuring out the unknowns of this engine, the toughest so far has been finding the base OEM ignition, fuel and VE maps (since it uses speed density air modeling). So here is the deal:
I want replace our current ECU setup (piggyback powercommander III attached to the original engine ECU) with a standalone ECU. The thing is, to do that, I sort of need to have a base map to start from (and I've tried searching for it to no avail). Failing that, I'll have to set conservative timing for ignition, Fuel map of basically Lambda = 1 across the board, and VE table set with a single starting value for the whole table. Also, I won't be able to touch the engine until I can get it to a dyno and start tuning from there.
I guess my question is, How did you guys deal with installing a new, standalone ECU on your engine? Did you have the OEM base maps? If so, where did you find them? If not, what was your process? Did you do what I've written above, or was it different?
My second issue is finding the TDC offset to put in the ECU settings. I don't a timing light around at the moment, so I was wondering if there is a different way to find TDC offset without using a timing light. I've had a few ideas already, but unfortunately all of them fail because they require knowing exactly where the index tooth is (that is, it's zero crossing on the signal). Not to mention the loss of accuracy of doing it without a timing light. So basically, do you have any basic ideas on how to find TDC offset without a Timing light? (I'm afraid this question might be too general).
Thanks for whoever answers. The TDC offset thing is less of an issue, but the OEM base maps really have me stuck, seeing as I don't want to start the engine with a bad map, to have it destroy the engine.
Apologies if my questions are too general