Like ebony and ivory, I have my Aquamist HFS-1, GM BCS, and tephra v5 working in perfect harmony on my car. Boost is semi-dialed in so that my base map hovers around 21psi and my alt map hovers around 26psi. Base map is a basic pump gas tune I put together for myself, and the alt map is a modified version of my tune from my SMC alky kit. Both need refinement, but you get the idea of how awesome these technologies working together is!

video:

I donated money to Tephra, did you?

There is no fancy footwork here, there are no extra switches. I have a 240k resistor running from a 12v source in the dds junction box that is switched on and off using the dds and then runs to pin 42 of my ecu. Simply turn dds off and you drop down to a standard pump gas tune. If any of the standard failsafe catches on the aquamist kit are hit, it falls back to the pump gas tune (and low boost) as well.

 

Hey, I'm installing the Aquamist HFS-5 system, not the HFS-1 like you did. I wanted to ask whether or not the wiring to the ECU is the same as for the HFS-1, using the new v5 patch. Also, once that is out of the way, WHICH map is the default and which is the alt? Thanks

 

Wiring will be the same, and base map is low boost (0v to pin 42) , alt map is high boost (5v to pin 42).

Search the alky forum for wiring diagrams, several are posted.

 

Very impressive. I will be next with this setup!!

 

that is the exact same thing I am doing to a buddies car with the HFS w/ tephra v5

 

Any tips for the following ROM parameters:

Alternate Map Time to Activate
Alternate Map Load Threshold
Alternate Map ADC0F Threshold

Alternate Map Injector Scaling (please explain this one)

 

for w/i failsafe or just map switching in general

 

for W/I failsafe use only

 

Alternate Map Time to Activate
Set to 500ms (thats a 1/2 second) you want it to activate fast
Alternate Map Load Threshold
leave it as is
Alternate Map ADC0F Threshold
Leave it as is, basically its saying you have to be over that voltage to switch to the alternate map. Using it with the HFS after it detects some type of failure, it will be 0 volts (failsafe /standard map). If everything is operational (no failure in the w/i system) then voltage will be around 4.7-4.9 (alky /alternate map).

Alternate Map Injector Scaling
This is nothing more than your injector scaling for your alternate map. Works perfect if you want a pump gas map and switch to an ethanol map. If your on stock injectors just leave it as is. If not take the value from your standard map and add it to this.

 

Load threshold is used for both AutoICS AND ADC0F enablement of Altmap. Basically the ECU WONT switch to the altmaps when load is OVER this value, just a failsafe!

Time to activate is used for both AutoICS and ADC0F, under AutoICS its the toggle timer, ie you need to hold down the button for this long to turn altmaps on or off. Under ADC0F its only a timer for GOING to altmaps, IE going to failsafe maps (0v) is instant!

Cheers
D.

 

thanks for clearing that up tephra. I was right the first time about the load threshold but went back and changed it.

I thought a while back ago you said something about the ADC input didnt use the load threshold (thats why I changes my post around). My apologies for the misleading info.

edit** fixed previous post

 

Yes, if I go WOT in 4th gear and then push the power on my DDS, boost drops and I get no knock. How fcking cool is that!?!?!?!? Damn I love this system!

 

Have your ALT map threshold set to around 100-110% so you won't be able to accidentally switch to the more AGGRESSIVE alt maps once you've started to boost.

Scheides, Here's the last test. Have the DDS "OFF"and while using the standard maps, try turning the DDS "ON" which exceeding the 110% threshold. You shouldn't see the the boost jump from 21 to 26 psi, it should stay at 21 until you allow the car to go below 110% load.

Its one thing if your failsafes turn your safer maps on(thats a great thing!), its another thing if it tries going BACK to the aggressive maps while you're flooring it (thats a bad thing). Imagine if your failsafe trigger was on the fritz and tried to switch back and forth between the maps 10 times a second! That could be bad, thats why his LOAD THRESHOLD setting is such a great idea.

 

yeah but all my failsafe switches or most I have seen happen when @ WOT, so he would stay in the aggressive map when he needs to be on the standard map if the DDS picks up something if you leave the load threshold to 110%. If the DDS had the "fritz", there would be alot more ppl complaining about there failsafe switching from high boost to wga pressure, and I would hope the user would have common sense not to get on there car without troubleshooting the problem. Leaving the load at 110% is taking the DDS failsafe out of the picture @ WOT.

 

I just woke up and am having trouble understanding this. I would like to know what you suggest then for load. I previously understood Tephra's post to mean that this value is for switching TO Alt maps, not to Base Maps (failsafe maps). In other words, if my DDS3 triggers a failsafe, it drops ALL voltage to PIN# 42, switching to my failsafe maps. The load value prevents the ECU from switching to Alt maps (meth, high boost) if the load is this value or above. So, in other words, if i decide to turn on the DDS and I'm at this load value or above, it will NOT switch to Alt maps until my load value drops below this number.