Do I Need A Fmu With A V-afc??

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Okay, now I can give you a much more detailed suggestion. I have done almost every basic turbo tuning/management there is. I'm not a big fan of FMU's. I'd rather run the APEXi "hack" and DSM 450cc injectors anytime. Boost dependent FMU will require a map check valve "missing link" to avoid CEL with a MAP code. It does this by venting off pressure reading from the MAP sensor while at boost. In other words, you are purposely letting your set-up leak boost (from the MAP sensor) just to avoid CEL. Also, the transition from vac to boost suks. If you go to my website, you'll see that the honda fuel system is a constant recirculation system. Whatever fuel that is not burnt by the engine goes back to the fuel tank. What the FMU does is regulate the amount of fuel that goes back to the tanks by keeping a positive "flooded" fuel rail. A flooded fuel rail will obviously keep a positive fuel flow to the injectors. Great theory! But, all fuel pumps are positive displacement gear type pump. Postitive displacement pump will put out the volume it's design to do no matter what. If the fuel is not flowing (since the FMU is holding some back), it will or may cause premature damage to the fuel pump. If the fuel pump gives up while you are boosting, then you will blow up your engine.

The AFC hack, DSM 450cc, and resistor box method is great! There is no boost transition. It's like driving a stock turboed car. Again, go to my website and read up my "tech" pages towards the bottom of the homepage. ....and dont forget to sign my guest book