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I think that I am following this correctly, but please stomp the ignorance out..... I have looked at the Hahn site some as well.So this system is completely stand alone from all of the normal bike computer, wiring, etc. Does the bikes injection just run a map based on RPM, Throttle position, etc? No vacuum or oxygen sensor feedback?I take it that you are not installing a complete turbo kit, but just the additional FI to add in for the turbo? You have already been running a turbo before, but have been trying to make the stock computer/injectors compensate for it by changing the fuel map? But now you will go back to the stock map to get good driveability, while only tuning the Hahn map for when boost starts to build?If my assumptions are correct, then these questions should make sense. How is this system picking up the information for it's fuel map? The RPM, Throttle position etc? Is it a harness that plugs into the busa harness?I am curious because this system should be able to be easily adapted to any FI motor that someone wanted to turbo, except for the wiring and the throttle body adapters?Thanks,Carl
You would be right .All you need is the map/s for the needed fuel compensation derived from dyno logs of A/F for the engine you are tuning.I understrand that the fuel control box tho is a system that controls 2 injectors per"side " of the controler.My question is could it be adapted to a 2-6-8 cylinder engine? I'm thinking no.Anyone know?
So this system is completely stand alone from all of the normal bike computer, wiring, etc. Does the bikes injection just run a map based on RPM, Throttle position, etc? No vacuum or oxygen sensor feedback? If my assumptions are correct, then these questions should make sense. How is this system picking up the information for it's fuel map? The RPM, Throttle position etc? Is it a harness that plugs into the busa harness?
I take it that you are not installing a complete turbo kit, but just the additional FI to add in for the turbo? You have already been running a turbo before, but have been trying to make the stock computer/injectors compensate for it by changing the fuel map? But now you will go back to the stock map to get good driveability, while only tuning the Hahn map for when boost starts to build?
I am curious because this system should be able to be easily adapted to any FI motor that someone wanted to turbo, except for the wiring and the throttle body adapters?Thanks,Carl
In a nutshell, let the complete factory system run the bike in all areas below boost, and let the Hahn FUEL the bike in all areas IN boost.
A pic of the mapping program...pretty simple.
(+, -, TACH, and any signal ABOVE the throttle plates)
The Hahn is actually adding more fuel on top of what the standard FI is putting in right? Or does the regular FI drop out when the boost starts building?
So will you eventually have a number in every RPM/Boost box above 0 PSI boost?Does that number represent duty cycle % on the injector?
Okay, question here. Just to clairify when you say Above the throttle plates? I put my boost reference line AFTER the throttle plates. If you go before then you will get some big spikes of fuel when your throttle plates are shut. Per example, You are running the hill and pulling 22 lbs of boost and you let off quickly. Right when you let off your throttle plates slam shut. Your plenum still has boost in it and the boost actually spikes during this time in the plenum untill the bov releases it. (I have seen it climb as high as 5 additional lbs) If you are ABOVE the throttle bodies with your reference, the Split Second controller will still be feeding additional fuel to the motor while the throttle plates are shut because it is still seeing boost. If you reference AFTER the throttle bodies then it only sees what the motor sees. Does this make sense??
I also saw that you are looking for a Plenum Hold down. I got mine and powerhousemc.com It would be easy to make one but if you look at their's you would get a good idea. They actually made that for the Hahn system originally.