ECU ignition timing

[thundair]

Is there a way to fool the computer in eliminating the timing advance as RPM increases?
All my mapping is for fuel......

The project needs the spark to always fire at 6* before TDC as we are introducing another flame front at every 1500 RPM and it will mess up our dyno test.

Thanks in advance

I don't know anything but the people that do.

 

[thundair]

The test bed is a Moto Guzzi 1100cc twin.
I think the computer is a Weber Morrelli..

Although the design is for automotive the ease of having the heads stick out in plain sight and the lack of water jackets made it the best choice for us...




I don't know anything but the people that do.

 

[GregLocock]

Simplest way is probably to bolt another ignition system on.

Cheers

Greg Locock

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.

 

[thundair]

That was plan B

Thanks

I don't know anything but the people that do.

 

[sreid]

If option B includes completely changing to a programmable ECU, consider

http://www.redlineweber.com/html/Fuel_Injection/Fuel_Injection_Table_of _Contents1.htm

 

[bradrs]

There is a company that sells programming tools for the Moto Guzzi with the Weber ECU:

http://www.fuelinmoto.com.au/

They may have a tool that will allow you to set a fixed timing, although I am not 100% sure.

 

[turbocohen]

try an electromotive ecu. easy to calibrate with any pc.

sounds like a peripheral ignition project in the works.

 

[EfiOz]

Which Weber ECU is it? If it's the IAW M5.9 then theres a fully programmable replacement one available.