EvilTechnology

iTrader: (64)

Hey guys need some help convincing my tuner here. I'm wanting to go with an Aquamist HFS-3 kit to go with the FP Black that will be going on soon. Planning either 50/50 or just denatured alky.
Car currently has a Grimmspeed 3 port and is using ecu based boost control. Tuner said I'm currently using Tephra V5x or Vx5. I'm certain there has to be a way for the Aquamist HFS-3 with the DDSv10 gauge(failsafe) to switch maps as the fail safe. He's not sure as they typically use AEM meth kits. I'd much prefer Aquamist.

Is there a way to do it with some patch or alt-switch harness or something? If so, what exactly is it and how fast can it switch? Fast enough to save the motor?

I can link him to this thread after I have some answers in here.

FWIW I won't be running a ton of alky or meth, just a small jet, since E85 isn't easy to get here in Seattle.

I've seen some pin-outs of the HFS-3 sending a signal to a BCS. I know that's the stock boost control solenoid, but could it send it directly to the Grimmspeed 3 port?

FWIW when my current FP green comes off and the Black goes on, it will be external wastegate(Tial 38mm), as it's already set-up for that. Not sure if that matters as far as ECU based boost control goes.

Thanks,
Fred

gear head

iTrader: (3)

For thr DDS3 v10 it's a simple one wire hook up for ALT MAP.

It works the same on Tephra V5 or V7, It's the only failsafe I use.

EvilTechnology

iTrader: (64)

Thanks. What all do we need to do it? Do I need the alt-map harness that Jamie sells or anything? If my tuner has any questions can he ask you?
How fast does it switch maps?

mt057

iTrader: (6)

It should only take a few milliseconds at most. The switch happens very fast. Just make sure to adjust the failsafe window properly and not leave it wide open requiring great extremes for activation.

gear head

iTrader: (3)

No, you shouldn't need a harnesses, always verify with a volt meter though..should be 5v or slightly less. You will need a wire & ECU pin.

Like the post above says, make sure the failsafe window is set up correctly.