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Old 11-28-2009   #33
scheides
flips McGee
 
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Re: Speed Density on Evo ECU

For me to do this safely I have a wideband and have been logging logging logging my car under all driving conditions and openly accepting the fact that ultimately I could do more harm than good during this process. without a wideband, a trip to the dyno is really really necessary to get this done, and I'm sure it'd be more time than a standard tune although it isn't much more work than dialing in injectors and standard maf scaling it does take some time.

The other thing to remember is that if your volumetric efficiency (VE) changes at all, you need to brush up your fueling. If you put a few parts on and make a bit more power, you'll be running lean, as this whole system is built around specific scaling for the engine's current VE.

I'd say its worth having a wideband in the car (they're cheap now) and owning a logging cable so you could plug it in and verify all is well now and again, but I would say if shane is willing to do a tune on it I'd be willing to help anyone get converted and make sure everything's ready to rock.

Parts list:
-IAT sensor
-uprated MAP sensor, JDM/EvoX 3.3 bar or the Omni 4 bar
-wideband (LC-1 or similar)
-tactrix cable

Once I make sure all is dandy with my car I'm willing to let people check it out for themselves, I think it is absolutely worth the effort.
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