Trigger related page for MembersPage/DTechnologies/Hayabusa project
I need to configure the firmware for my engine.
Basic info
- ... cyl, even fire, fire order: ....
- crank and cam triggers involved - both are variable reluctance sensors. The 2nd LM1815 bought separately (only 1 LM1815 is populated by default) is already mounted on board (?).
Crank trigger
- there are 8 equidistant teeth on the crank
- positions: ... I don't know the timing yet
Cam trigger
- single tooth (natch)
- timing: I don't know the timing yet
How do I figure out the timing? - with the least amount of fuss
We usually remove a sparkplug, and move the car in gear 5 until the given engine is at TDC. Than look at the trigger wheels.
There are often marks on the crankwheel (that can be at TDC or other position in custom-hacked setups)
This is something I've been fearing. I've had the engine apart but I can't determine anything that way because the sensors themselves are mounted inside the covers (valve cover & stator cover). At best I'd only be able to guess how many degree's forward or back they are of the tooth/teeth.
How to I set up the firmware appropriately?
The bad news is that current firmware does not support this crankwheel directly, unless engine is a 16cyl.
Options:
- bolt on another wheel, eg. 12-1 (or 36-1 or 60-2). Feasible ?
- 2003 Hayabusa uses a 24-1 wheel. The wheel is also the magnet wheel for the generator...so it's a bit expensive. The search for a used one has been going on for months.
- Aftermarket options are available. Fast by Gast makes a 2 magnet trigger wheel which is driven by starter gears. Requires entire starter housing to be replaced with custom assembly cnc'd out of billet aluminum...even more expensive unfortunately.
- grind off 1 tooth from crank to get a 8-1 multitooth wheel
- Teeth are very wide. This would definately cause balance issues.
- firmware modification: feasible, but significant table-testing needed
- Considering my inexperience, this might not be the best path.