rusefi.com

Hi all,
I'm Thomas, from France.

I was looking for an affordable way to replace a stock Suzuki CDI unit on a motorcycle, that's how I discovered the existence of rusEFI. After some reading here and there, I'm now planning to use a uaEFI board.
The engine is a carbed '93 Suzuki GSXR 1100W (waterboiler), and sits in a Bimota SB6-R race bike.
No plan to replace the carbs since it's not allowed by the championchip rules.

The engine has a VR crankshaft sensor, on which I will install a 24-1 (or 36-1) trigger wheel.
I allready run wasted sparks on Denso pencil coils, and it may stay as is. Maybe sequential spark control in a second step, but adding a camshaft sensor looks complicated.
TPS sensor is already installed and used for logging, mainly for carb tuning, and will be easy to route to uaEFI for alpha-N control.
There is a single WBO2 (Bosch LSU 4.9) sensor, also used for carb tuning, which could be used for altering spark advance, but it seems this feature isn't implemented yet (correct me if I'm wrong).

Cheers,
Thomas

Hi all,

I received UAEFI board last week.

I prepared a small test bench for experimenting different trigger wheel designs (36-1, 24-1, 20-1, 18-1) and see which one gives me stable/reliable results with the stock sensor. I found the configuration for the wheels under Tuner Studio, but I'm not sure, are all these trigger patterns supported by rusEFI firmware?

I also have to install IGBT to drive the stock dumb coils (Denso 3 Ohms pencil coils). I found FGD3040G2-F085C cheaper and easier to source in small quantities. Are these directly compatible with UAEFI board, in place of ISL9V3040D3ST ?

Good morning,
I think we are the two French with Uaefi.

cyrille wrote: ↑

Tue Jun 03, 2025 1:51 pm

Good morning,
I think we are the two French with Uaefi.

Great to know there is another french onboard !
Where are you from in France ? I'm near Périgueux.

Saint-raphael- var

Hi everyone,

I've finally started working on the UAefi board. I've tested several laser cut trigger wheels with the genuine Suzuki sensor. The synch seems good, down low to 300 rpm and up to about 8200 rpm.
I'm using the MAX9924 input, and I was wondering if the input voltage is safe, or if it would require adding a parallel resistor (R775 on the schematics). I measured 20V rms across the VR sensor at 8000 rpm, and the final motor shouldn't exceed 11500 rpm. What do you guys think ?

Here ar some pictures of the trigger wheels I'm testing, along with the genuine Suzuki sensor, mounted on a small 3D printed test bench. I use a tiny RC plane brushless motor to turn the trigger wheels, from 0 to about 8500 rpm.

The stock GSXR trigger wheel : A custom 32-1 wheel : A custom 24-1 wheel : The 3D printed bench with Suzuki GSX-R 1100 VR sensor and custom trigger wheel installed :