When do you need to get an AFC and an FPR? I heard that you need one of those after you get mods such as I/H/E. If you dont get these mods is it bad for your engine??

 

Not really bad for your engine, but makes your engine run lean. Which pretty much means too much oxygen flowing, not enough combustion - gas. A FPR allows you to up or down the amount of gas into engine, also same with a AFC, yet AFC allows other functions such as vtec controller - if I am not mistaken. It would be a good idea to get a AFC and mess around with it on a dyno. See where the best power comes from. Hope this helps. I would say for sure to get an Apexi AFC if you have intake, header, and cat-back exhaust. You want your engine to run rich, otherwise you might be losing performance...

 

The ECU will compensate for the extra air to an extent via the O2 sensor and OBDII. I don't think you need an AFC for just I/E/H. Unless you want one to tune with, but it will be more useful with more mods, such as larger injectors for example, where some kind of fuel control is needed.

Greg

 

Oh.. thanks.. So the AFC and the FPR is basically the same thing??

And more mods? Such as??

 

The FPR increases fuel output from the injectors by increasing rail pressure. The AFC increases fuel output by changing the pulsewidth of the injectors by altering the signals that the ECU receives from the engines sensors. The AFC is more precise.

HTH,
Greg

 

Probably stuff like porting the manifold, larger throttle body, and aggressive cams.