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Posted: Wed Feb 23, 2011 2:28 am
by Nate
03 cannondale cannibal
450cc piston kit
flat faced valves
fresh rebuild
has aftermarket tune on ecu, can't get the exhaust pipe to stop glowing red!
I put a afr gauge on it and it was running 17.5 and higher which is too lean.
added to the throttle offset to acheive 12.5 afrs across the board, but is still red hot at 8500 rpm
quick info
k&n air filter
velocity stack kit
cp piston kit (450cc)
flat face valves.
91 pump gas
I have the tuning software for the quad, my real question is what more do i need to adjust to get the tune in the "safe" zone!
Just need some pointers on adjusting the tune, And allow the quad to not get hot as heck on the exhaust side!
Posted: Wed Feb 23, 2011 2:33 am
by proflow
Do a wide open throttle plug check to see what you have there. (Throttle Chop)
It's not abnormal to see the header glow on these & other four strokes as well.
Proflow
Posted: Wed Feb 23, 2011 2:50 am
by Nate
Do a wide open throttle plug check to see what you have there. (Throttle Chop)
It's not abnormal to see the header glow on these & other four strokes as well.
Proflow
played with the throttle offset( its at 9 now) got the bike to not glow at idle but still glows if you just rev it to 6500 and higher..
should i run 100 ocatne?
Posted: Wed Feb 23, 2011 3:16 am
by proflow
Higher octain is only a good idea if you have the running compression to support it. Otherwise its a slower burning fuel & will actually drop in H.P. Leaded fuel burns cooler than unleaded however.
Proflow
Posted: Wed Feb 23, 2011 6:09 pm
by kdeal
Throttle offset has nothing to do with the AFR (rich or lean). You need to adjust the "Injector Flow" and the "Injector Offset", not the "Throttle Offset". The Flow number is the big number "like 2500" and is like the main jet on a carb. The Injector Offset is the lower number (usually around 1.0) and is like the pilot jet. Go lower on the Injector Flow number by like 100 points and you should be closer. (Example 2500 to 2400).
Posted: Thu Feb 24, 2011 3:09 am
by Nate
Throttle offset has nothing to do with the AFR (rich or lean). You need to adjust the "Injector Flow" and the "Injector Offset", not the "Throttle Offset". The Flow number is the big number "like 2500" and is like the main jet on a carb. The Injector Offset is the lower number (usually around 1.0) and is like the pilot jet. Go lower on the Injector Flow number by like 100 points and you should be closer. (Example 2500 to 2400).
This is the answer I was looking for! Thank you! However i have played with the injector flow and the injector offset, sent it to the ecu, and the afrs never changed a bit (17.5 and higher) started to tinker with the throttle offset and bingo, the afrs got richer and richer the higher the number.
I am going to grab all the current settings i have and report back
Posted: Thu Feb 24, 2011 3:38 am
by Nate
This is the answer I was looking for! Thank you! However i have played with the injector flow and the injector offset, sent it to the ecu, and the afrs never changed a bit (17.5 and higher) started to tinker with the throttle offset and bingo, the afrs got richer and richer the higher the number.
I am going to grab all the current settings i have and report back
here is the vitals:
injector flow rate:2600
injector offset: .88
t/b leakage: 7
throttle offset: 9
Posted: Thu Feb 24, 2011 12:44 pm
by kdeal
Set the Throttle leakage and flow to 0 and try your numbers again. Here is a typical spec chart.
[attachment=11292:Sample.jpg]
Very few engines need any throttle leakage or flow numbers and yours are off the chart. Typical numbers are 1.0 or less. There isn't even a list for leakage on this sheet.
Posted: Thu Feb 24, 2011 11:58 pm
by Nate
i will try those and report back