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Luanda...Did you try the Spit Second [R4 ] with the larger injectors first ? I put in 550's and so far so good . It isnt a real good management but its simple . I this shop in town gets the F-Con Pro dealership , Im going to start saving
eManage has drivers for both injectors and timing, when used with the appropriate harnesses. Not sure if the Split second box has both as well. I know it can retard timing and enrich fuel, I am unclear as to how the split second box does this.
Also, the Greddy software is very easy to use. I am sure someone else can comment on the R4.