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594 Posts
Below is a chart from adding ONLY a Dobeck Gen 4 fuel controller to a bone stock machine. I found the stock system to be slightly rich but pretty dang close. So by setting the cruise AFR to 13.5 and wide open throttle AFR to 13 which it held it at perfectly we gained about 1hp overall. Is this enough to go out and buy one from us? Not in my opinion but if you want to make sure your air/fuel is spot on 24/7 this will hold it where you want it and give you a reading of where it is running.
You however have to let the stock EFI system let it do it's thing below 6000 rpm which equates to about 36mph when cruising and has no affect on wide open throttle. The stock system with it's narrow band O2 sensors only corrects below this point and best to let it do it anyway. Plus even if you try with any fuel controller the stock system will pull it right back. Point is, leave anything below this point alone besides it affects nothing as far as performance is concerned anyway.
Next use of the controller will be Muzzy pipe. I will remove the controller, run the muzzy without it just to see what kind of fueling is needed, do a run then add the controller to get it where it should be.
But before I do the Muzzy I need one, it should be on the way so next part to test is the Dalton clutch kit. Hopefully tomorrow I will get it done.
Todd

You however have to let the stock EFI system let it do it's thing below 6000 rpm which equates to about 36mph when cruising and has no affect on wide open throttle. The stock system with it's narrow band O2 sensors only corrects below this point and best to let it do it anyway. Plus even if you try with any fuel controller the stock system will pull it right back. Point is, leave anything below this point alone besides it affects nothing as far as performance is concerned anyway.
Next use of the controller will be Muzzy pipe. I will remove the controller, run the muzzy without it just to see what kind of fueling is needed, do a run then add the controller to get it where it should be.
But before I do the Muzzy I need one, it should be on the way so next part to test is the Dalton clutch kit. Hopefully tomorrow I will get it done.
Todd
