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Originally Posted by cine135
Ok, I visited the local speed shop and they recommended either a new rising rate FPR or A piggyback FMU.
I know about the vortech FPR and the Apexi safc.
With the FPR I know I'll be getting fuel pressure levels not limited by factory componentry (other than the injectors, which can stand to blast a little bit more fuel) Though I have a feeling that with the Apexi safc, the signals sents to the ecu will simply cause the ecu to deliver a factory set "rich" condition at the rpms I specify. Is the Apexi unit really effective for a turbo setup?
I'm trying to decide which to go with, this car is not going to be setup for high HP so the boost is staying @ 5psi for the forseeable future.
Which would you recommend?
P.S. If I do go the FPR route what boost to fuel ratio is the 420a fuel system suited for? The speed shop suggested a 12:1, how does that sound?
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you need a rising rate fpr. go with the vortech fmu. a s-afc is for fine tuning, not for increasing fuel for boost. your injectors can only open for so long at high rpms. get the 12:1 vortech fmu. you will also need a new fuel pump, get a walbro 255