Supra Forums banner
1 - 5 of 5 Posts

·
Registered
Joined
·
1,851 Posts
Discussion Starter · #1 ·
I'm kind of a noob when it comes to AEM tuning so these may sound like stupid questions, but what is the best way to control boost when you have an AEM ems?

I know you can control boost with the AEM and a solenoid, but then wouldn't you not be able to change boost settings on the fly without a laptop in the car? Also what prongs would the solenoid be wired into on the stock harness to be controlled by the the AEM?

If I was to have an ebc along with the AEM would I have to change the map on the AEM if I was to switch between say 12 and 20 psi with the boost controller or would the AEM automatically adjust fuel for the increase in pressure?

I'm only used to tuning with an afc so the concepts behind pressure based/AEM tuning are new to me.
 

·
Speed limits = Guidelines
Joined
·
1,964 Posts
AEM's boost compensation function will do its job regardless of whether it controls the solenoid itself or some type of boost controller does it

on the v1 AEM box, there is a pin labled "Available Boost Control", its pin 60B to be exact...1 wire of the solenoid goes here, the other gets grounded

as far as changing boost on the fly, hooking up a hi/lo boost switch to AEM is quite simple...mount a toggle switch somewhere, ground 1 side of it, the other you wire in to 1 of the available input switches on the ems (i chose switch number 2)...then to set it up, 1 of the drop down menu's in AEM pro will have an option for "Hi/Lo boost switch"....you go in there and set the switch you chose in the drop down menu to say "switch #? Grnd=On"...then you can set your target psi for the switch

edit: ive only done this on a v1 box, cant speak for the v2....but i doubt its very different
 

·
Registered
Joined
·
1,851 Posts
Discussion Starter · #4 ·
Thanks for the responses guys. I've done some research and have decided to go with the AEM solenoid controlled by the EMS. I was just going to keep it simple and get it tuned for around 18-20 psi and leave it there, but I'll definitely look into the boost switch (I'm trying to save my w58 for as long as possible).

One last question, does anyone know where the wire from pin 60B ends up in the na engine bay if at all? I know in the TT it ends at the stock boost solenoid, but I haven't been able to find any info on the na other than the pin isn't used for anything.
 

·
Speed limits = Guidelines
Joined
·
1,964 Posts
Thanks for the responses guys. I've done some research and have decided to go with the AEM solenoid controlled by the EMS. I was just going to keep it simple and get it tuned for around 18-20 psi and leave it there, but I'll definitely look into the boost switch (I'm trying to save my w58 for as long as possible).

One last question, does anyone know where the wire from pin 60B ends up in the na engine bay if at all? I know in the TT it ends at the stock boost solenoid, but I haven't been able to find any info on the na other than the pin isn't used for anything.
the pin list for the factory wiring says its not used...so I assume it just has 1 of those yellow plugs capping it off
 
1 - 5 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top