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Ignition/Tuner/ECM/Fuel InjectionNeed advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
I'm wanting to add more fuel to my front and rear ve tables since I recently changed my ac filter from se oval to to the wider high performance oval one from arlen ness. Bike feels like it's running a bit lean or rough. I wanted to fatten it up some to see if it would smooth it out. I also changed exhaust from 2.5" baffle to mufflers with decibel reducers, so I think it might be more restrictive now.???
Would I increase or decrease units or percentage in ve tables to add fuel? And would it be OK to start with increments of 5 units? Any suggestions?
I don't have time to record a bunch of runs to dial it in atm, so trying to get it decent til I can record data runs.
Last edited by SmittyFXDL; Dec 22, 2024 at 10:13 PM.
I'm wanting to add more fuel to my front and rear ve tables since I recently changed my ac filter from se oval to to the wider high performance oval one from arlen ness. Bike feels like it's running a bit lean or rough. I wanted to fatten it up some to see if it would smooth it out. I also changed exhaust from 2.5" baffle to mufflers with decibel reducers, so I think it might be more restrictive now.???
Would I increase or decrease units or percentage in ve tables to add fuel? And would it be OK to start with increments of 5 units? Any suggestions?
I don't have time to record a bunch of runs to dial it in atm, so trying to get it decent til I can record data runs.
you shouldnt just adjust without doing at least one data log run. To just blindly increase your VE table is not a good idea
I'm wanting to add more fuel to my front and rear ve tables since I recently changed my ac filter from se oval to to the wider high performance oval one from arlen ness. Bike feels like it's running a bit lean or rough. I wanted to fatten it up some to see if it would smooth it out. I also changed exhaust from 2.5" baffle to mufflers with decibel reducers, so I think it might be more restrictive now.???
Would I increase or decrease units or percentage in ve tables to add fuel? And would it be OK to start with increments of 5 units? Any suggestions?
I don't have time to record a bunch of runs to dial it in atm, so trying to get it decent til I can record data runs.
Increasing the VE numbers increases the injector time, so it adds fuel. Roughly speaking, 5 VE units (1 unit = 1/2 point) on the TTS VE table will add ~.25 of a point of AFR. If it was at 14.5 @82.5VE, would become ~14.25 @85VE.
Changing small amounts of airflow shouldn't make big differences in the way it runs. More restrictive baffles tend to need less fuel, and that AC flows a pinch more, so the combo should be within 5% of where you were originally. You will be better off by using a session of Flight Recorder and V-Tune to dial it in, rather than adding VE points randomly (like throwing darts with a blindfold on).
Last edited by rigidthumper; Dec 23, 2024 at 09:23 AM.
Best description Ive heard of guessing at calibration changes based assumption rather than data/measurement.
It would be better to leave the system to adjust for the minor changes from the stage1 (pipe/ac)changes. At least those changes would be based actual measurements rather than guessing at what the engine wants for best running.
Bob
Best description Ive heard of guessing at calibration changes based assumption rather than data/measurement.
It would be better to leave the system to adjust for the minor changes from the stage1 (pipe/ac)changes. At least those changes would be based actual measurements rather than guessing at what the engine wants for best running.
Bob
agreed, but of course thats for closed loop. I dont understand why anyone would think you could change the airflow then blindly adjust for it. 🤷
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