HP Tuners for 2005-2015

I know nothing about tuning. I’ll pay someone to tune mine whenever I get my exhaust!

 

Im guessing this is the plug near the passenger rear side of the blower?

 

In regards to power made above the ~4100RPM switching point I can say without hesitation that the difference is observable in feel, and visually in the datalogs. There is a pronounced boost in output with the ACIS "Off" above ~4100RPM.

Here's what I see in the dyno results posted by @Torspd and how they relate to what is defined in the HPT VCM Editor. These were done with an aftermarket EMS or at least done with control of the valve independent from the stock ECU. I surmise that the 4100RPM switching point was known, and thus used in this test to show the effects of the ACIS valve in a constant "On" and "Off" state and one run transitioning from "Off" to "On" at ~4100RPM. Obviously these tests were all done at WOT on the dyno, so it can be assumed that the throttle is open >60°. So the charts posted here are not representative of results obtained how the ACIS system is configured from the factory.

In stock configuration the ACIS is configured like so:
RPM/Throttle Angle
Low/Lo: 0
Low/Hi: 0
Med/Lo: 0
Med/Hi: 1
High/Lo: 0
High/Hi: 0

RPM: Low = <2200RPM, Med = 2200-4100RPM, High = >4100RPM
Throttle Angle: Lo = <60°, Hi = >60°

Knowing this, It's clear the ACIS operation in factory form (at least from >2200RPM)does correlate to the tests performed by @Torspd. Below 2200RPM, though, the factory configuration is set to have the truck run with the ACIS "Off" (or in Short Runner) mode. To exactly copy Tor's results, you'd want the Low/Hi to be set to "1", to put it back into the "On" position (Long Runners) to boost the torque gained from that (as shown in the dyno).

I hope this helps.

 

If I can help, let me know and I'll be more than happy to set you up.

 

Not sure if the UCON passes that signal through, but if you were to intercept the wire pre-UCON, yes the stock N/A ECU would still output that signal (and thusly could still "tuned" via HPT)

 

Any idea what kind of voltage this plug would show if it was functioning? I can do some testing with a multimeter to see if mine is alive

When does this even function? If its at wot then i wont be able to test the connection lol

 

I don't have the schematics in front of me at work (@loginfailed?). But generally the ECU triggers a ground to actuate solenoids like this.

 

The thing about the UCON is that it already has a number of available inputs and output available for just these functions. If you wanted additional auxiliary control, and you already had the ucon, that would be the way to go. It's the only reason I'm on the fence with the UCON/HPtuner decision. I have the 7th injector for cooling and I really want to keep it. If I go HP tuners then I'd have to go with a stand alone 7th injector controller and would need to work to tune it.

 

Do you have access in the UCON software to define the switching points?

 

HAHA, you know I don't!

That's the magic behind the scenes that I'm not qualified enough to be granted access too. Hence the interest in the HPTuner. I have my tuner and injectors sitting on the work bench.....If I only had the time!

 

This is what I was trying to say, is that i might be possible to activate if there is a single byte switch in the cal. Unlikely though. If the entire section of code is missing, good luck.

 

I honestly wasn't sure if you had access to the auxillary harness/functions. I knew access to the main mapping was "off-limits". That does kinda suck.

 

I just find it interesting that toyota wouldnt also use the long intake runners at lower rpms and high throttle positions (assuming a 1 turns it "on" or long intake runner)


@Torspd in the dyno below, was this a stock non modded, stock ecu truck? (that is to say the ACIS functioned as designed from the factory, when it wasnt locked in one or the other position)

 

@JustDSM what was the throttle mapping u did look like?

 

I too found it interesting!

 

Like JustDSM stated its an ECU switched ground. The Blue with white stripe is a switched constant 12v, the white with blue stripe goes to the ecu and gets grounded when the ecu wants to move the ACIS valve.

 

the ACIS code is eliminated from the TRD cals across all platforms unfortunately. There is no switch to turn it back on

Also, as far as i can see the ACIS values are correct in the editor. A Tundra activates ACIS LoRPM,HiTPS and MedRPM,HiTPS and the Tacoma only MedRPM,HiTPS

 

This is seriously great support, thanks for all the guidance and help.

 

@HPTuners, coming in clutch! If this is infact the case (torspd can comment on my question to him above regarding stock truck on the dyno?). Then maybe some gains can be had at the under 2200rpm mark by switching the ACIS valve "on" in the LoRPM HiTPS zone

 

I "tested" that in Mexico yesterday evening, and it's noticeable. I was going to update all N/A cals, except yours..

Thanks @Torspd for providing the dyno sheets. It confirmed my observations via datalogging.