Going Single after 10 years / SP F1 Manifold, PTE6265 by Josh S

5 minute(s) of a 66 minute read

Thanks Reid! I'll call Larry if I have any questions on my meth setup.  

Here is a quick video I took today

Commentary and sound effects by my wife, lol. 

7-17-2011

After a lot of research and thinking about my methanol injection system I decided to purchase an AEM injection monitor gauge to use in conjunction with the ProEFI as a failsafe measure.  

I am using the ProEFI to progressively control my meth pump and adjust the fuel trims and the AEM monitor will provide feedback should anything go wrong. The AEM monitor has a flow meter that is installed before the meth nozzle. Once it is all installed you can connect the gauge via USB and run a baseline injection flow rate vs. duty cycle curve. You then set high and low limits around this baseline.  

For example a clogged nozzle will show up as low flow and trip a fault, likewise a high flow (popped off hose) will trigger a high flow fault. I connected it so that a fault will automatically change my iBoost setting to 1 (base boost) and tell the ProEFI to turn off the meth injection thus removing the meth fuel trims. The system is wired is such a way that anytime the ProEFI is calling for meth (pulsing the output to my solid state relay) the AEM monitor will see it and check for the correct amount of flow. This is true even if the fuse, relay, or pump goes bad.

My connection schematic is below for anyone interested in doing something similar.



Now on to the install of the gauge itself. I decided to install it to the left of the steering wheel where the dimmer controls are. I realize that this is not a great location for visibility, but the whole point of how I've designed the system is that it will work automatically so I don't need to monitor the gauge. The whole gauge and needle also blink on a fault so it is easy to see that. I don't like A-pillar gauges and didn't want to cut any of the bracing behind the gauge panels so this was the best location for me.

I drilled a 2" hole with a hole saw:

After a couple passes around the hole with a sanding wheel on a dremmel the gauge fit right in:

I relocated the dimmer to below the dash here.

I added the recommended AEM filter to the line going from my tank to the pump:

Installed the flow meter right before the nozzle:

Ran the line from the flow meter inside the fender and inside the car to the gauge:

Here is all the wiring ready for the gauge to be installed:

For the toggle switch that I can use to turn the meth on/off I found a project box I had laying around and mounted the switch to that which I then placed in the glove box. I left some room so I can add additional switches as needed (anti-lag control is one I may add)

Here is the gauge installed and powered up:

I did some testing with the nozzle removed from the IC pipe and everything seems to work great. I'm scheduled to get back on the dyno on the 28th so hopefully I won't have anymore issues and can get this thing running some boost