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I use a CBR 600 RR,which has a 20 mm restrictor in intake, for Formula Student competition .Due to the design of the intake ,the engine runs badly at idle and sometimes it is difficult for the engine to start up. I have filled the Start Fuelling map , which adds +% of fuel for the first crank turns and I have seen an improvement in start up. I am thinking of adjusting the injection timing to improve idle , maybe 5-15 degrees fuel injection after intake valve opening. Am I going in the right way? Should I adjust the injection timing at acceleration or at WOT? Can someone tell me also the effect of injection timming in fuel efficiency? Thanks in advance!
Hi. Have a read here, it will give you the general idea on injection timing.
