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Summary of change:
Current Project : Hayabusa 1300cc engine Short description 4 Cylinders Bore 81mm Stroke 63mm 4 injectors 24lbs 4 COP spark plugs VR sensor on Crank VR sensor on Cam Modified engine with lots of compression Progress until now : Stock wheel on crank has 8 evenly spaced teeth. We have modified this wheel so now it has 24-2 teeth. The stock injectors are placed under the butterfly, this was modified so the injector are above the throttle bodies. Do i set setting to port or throttle body? I am familiar with this kind of tooth wheel. When i crank the engine with the spark plugs removed, i can adjust the reference as i wish. When i crank it with the plugs installed, the RPM is so irregular that i cannot get the engine to start, not even with the adv filter. I've recorded the signal and put it at http://www.vems.hu/files/MustangStef/Hayabusa/busacrank.wav The same wheel on a standard engine with normal compression works just fine. Is it possible to extend the range of the adv filter? When i strobe the engine with spark plugs installed, i find tdc on 90°, whereas the same procedure without spark plugs installed gives 63° degrees. Ignition timing is way off during cranking. I can solve this by using 90° reference and offset my sparkmap with 27 degrees. Wouldnt it be possible to have a negative advance during cranking? When we pull the car it starts, and everything seems normal. I have the tables and config but with the filter setup for the standard engine : http://www.vems.hu/files/MustangStef/Hayabusa/config.txt http://www.vems.hu/files/MustangStef/Hayabusa/tables.txt 15 APRIL 2008 : Tried to feed the starter with 24V instead of 12V. Cranking rpm goes up to 510 rpm. In this setup engine starts very well. I dont have any trigger errors anymore. Still i would like to be able to start on 12V. Anyone has any ideas? High CR Busa's seems to have problem with starting kickback. One solution (still 24V though)http://aperaceparts.com/tech/batteries.html or more powerfull starter. SeppoRepo
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