Quote:
Originally Posted by Myka
I've read that tuning direct injection engines is harder. Like the ecu is harder to crack or once you're in there it's hard to tune. That's another reason it probably won't have a subbie ecu, the ft will be DI.
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Toyota ECUs are impossible to crack. Tuning DI engines is a lot harder, but not because of the ECU (well, maybe in some cases..like the 2GR and UR engines yes)...
Firstly, unlike port injection, it's not as easy to just swap out injectors for higher flow ones. The there is the fact that not many people really have a lot of experience with it. Then there is the fact that a lot of injection when into developing flow and dispersion patterns etc, and that f'ing with it might easily make things worse.
That withstanding, most diesel engines today are DI. I think a LOT can be had form DI gas engines... think of it it almost as moving from Carbs to multi-point electronic fuel injection. It really is that big a step. Cooler charges, precise fuel control, no obstruction in the intakes..... heck... once we get out heads wrapped around DI I think ICE tuning will make another step into the stratosphere.
**sniper edit**
here is a great
article