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.