skippy said:unclepaulie said:Jazza2442 said:recirculated ones are much better than venting to atmosphere as they keep the turbo spinning faster, meaning less turbo lag. ?
not really, the reason recirc is better then VTA only applies to MAF sensor based ecu's as the ecu knows how much air is meant to be recirculated and adjust fuel to suit, so when the air doesnt get recirculated, the ecu still think the air is there so the AFR runs rich, when causes bad fuel economy and stalling.
if you have a MAP based ecu, you can VTA all day
This is for my personal benefit, but I'm sure some others would like to know... I'm turboing my car, I've currently got a MAF, if I upgrade to a stand alone ECU do I still need the MAF? And I'll be able to successfully run a VTA BOV? (I like the wank factor)
it depends what ecu you choose and whether you car is manual or auto.
for you personally Skip, having a manual, you're in a better position. you might be able to ditch the MAF with a good standalone ecu(vipec, adaptronic, haltech etc). if you do this and use a MAP sensor, you can run vta or recirc as technically, the ecu will choose the fuel levels based on manifold pressure. if you set you piping up well you might be able to switch between VTA and recirc quite easily...or get an adjustable bov