Racegate I have been doing alot of testing and I have everything configured to work but I did still have a question. On the SMC kit I understand it is suppost to work the same just backwards and to change the logic it isn't a problem but I just want to be sure becuase when I put a volt meter to check the line it looks like it gets power when the spray is on and doesn't when the spray is off. The other side is just the opposite so when running this to a Switch input on the AEM is it safe sence it does have a voltage at some point? I just wanted to be sure before I did a final hookup becuase I have read that the switch inputs on work for a ground connected or not connected only and that would mean that I would still need to use a relay like above to switch the ground.

 

GTVEVO-- according to Steve @ SMC, the pressure switch works on an inverted ground logic. There shouldn't be any voltage at the pressure switch output on the pump..only a short or no-short to ground.

And yes, you don't want to connect the SW input to a voltage source, it needs to be ground.

Have you measured the pressure switch when it changes state? Steve says its a ground circuit.

I haven't dealt with an SMC kit to be able to tell you either way, I can only go by what Steve@SMC says.

 

Basically their are 4 wires off of the SMC Controler two are straight up power and ground (Red/Black) and 2 are wires to run back to the pump (Green/White) and then bridge off for ground and a low level indicator. The problem is that the wires seem switch polarity once the pressure is built. When the pump is off once side has a ground and the other is charged. When the pump is on the side that was grounded is now charged and the other side is grounded. The voltage resistance that I read comming through is about 4-5 volts on either side. Now the AEM will work with this becuase I hooked it up and had everything working but I didn't leave it attached until I found out a for sure answer becuase I don't want to take a chance in damaging the AEM box since the SW inputs aren't suppost to have any voltage put in to them.

So I am looking for ways around this. Any suggestions?

 

GTVEVO- you want to tap directly off the switch on the pump itself, not the controller. That seems to be the issue.

 

The reason why is becuase it is the exact same wires going to the pump. One on top of the pump is already grounded , it is a constant ground the other side are the once that encounter the white and green controler wires so they open and close but there is nothing that just switches ground only on and off. I think there would be if I didn't have a spray light or a low level light.

 

Ok I just got off the phone with Steve at SMC and verifyed how the switch works and it is inverted just as you said but that isn't really the problem. The problem is that it does pass the LED voltage over it when the ground connection breaks. The voltage is about 5 volts just as he said but it is only enough power to kick the Spray or Low level Light on. I wonder if over time it could hurt the AEM since it such a low voltage/amp.

 

Okay I have a question about this maybe you guys can clear it up. AMS and other kits are progressive controlled meth. Now will the AEM be able to control the meth in the same way ? Or will it just spray the max? Because of course I want my meth to last longer this way. Maybe I dont know what im talking about lol - help me out

 

What I am trying to do doesn't affect how the kit sprays in any way, the kit will work the same. But what the AEM will do is if the pump is making adaquate pressure it will flip a switch to take fuel away and add ign timing. This way if the pump pressure is low or off or if you hit a big air pocket due to low alky levels it will add fuel and pull the ign timing back out to a normal pump gas map due to the AEM Switch being automatic. It is just for saftey and to help with the transition at the exact time of injection in any gear.

Right now I run everything using the NOS maps anyway I just enabled it to kick in at 7 psi no matter what as it does this it notifys me by kicking on the IC sprayer light in the dash. But it alows you to not have to change your pump gas map. But doing it off of the pump switch will add the safety that we are all looking for.

 

Well if im going to be using meth daily - i would like a FULL PROOF system that will secure every little possible failure. It's nice that you guys are doing it - so that once you set it up nice nice - we all can intergrate the system into out setup.

 

Ok everyone I think I found the answer to my problems. I will keep you all posted once I verify things work out as planned. Probably won't be able to test till Sunday night though. I need a cold

 

Great! Can't wait for some good results!

 

GTVEVO-- ahhh! ok, that explains it. I guess you can just use a relay to flip the trigger to gnd then. Should be pretty straight forward, lemme know if you need help with that, will be glad to help out.

RE: progressive alky +AEM: You can program in your own progressive controler using the AEM and a solid-state relay and a user PWM table, or #5inj driver map, etc. That is no problem if thats what you are after. Also can build in safteys...those are two seperate issues though. Saftey is one...and making it progressive is another. I see no real reason for progressive controllers with the AEM because the transition is smooth with AEM doing all the work. The cars I have setup in the past using safteys and alky have been non-progressive and they work great. You can add exra turn-on critera in the AEM on top of boost, TPS...don't turn on when the 2-step is active ,etc. Its really the best way to setup alky. Plus you can put in the failsafes. Honestly turning on alky progressive at 2psi is just a waste of alky IMHO. Just turn it on full blast at 15psi or so, and let the AEM remove fuel when it sees full pressure and whala.

But progressive is doable through AEM, but not necessary.

 

ATTENTION ALL AEM METH/ALKY USERS. THE WRITEUP IS COMPLETE AND THINGS ARE WORKING GREAT.


https://www.evolutionm.net/forums/sh...d.php?t=151383

 

I dont know where youre getting your info but its not fact. If you need more info on the Aquamist systems goto the website forum or send an email to the techs.

 

Don't worry I have and I made my choice along time ago to not get an Aquamist kit.