I'm sure I'm not the only one who had a simple project snowball into something much larger(had I known this I would have taken more pics), well that's what this was, it started off as a simple Zeitronix ECA-2 install.... When trying to decide where to put the sensor I couldn't come up with anywhere I was personally happy with, I read through the other posts on here about the install and they were very helpful and gave me most of what I ended up with idea wise. It ended up being a custom battery mount with a Braille B3121 to allow space between the battery and ECU for the Ethanol sensor.
Once I removed the factory battery and box there is a nice steel plate mounted on top of the motor mount bracket, this same plate has the support bracket for the airbox bolted to it for reference. that plate happened to allow a B3121 to sit on it almost perfectly, ended up welding a piece of steel leading off the edge of it following the same line as the factory battery box which allowed the ECU mount to bolt right to it (pictures will probably help explain it better) and on the opposite side of the plate a small piece of steel with a 90 deg angle facing up was welded on to support the battery on the fuse box side, there was also a piano brace welded from the lower strip to the backside of the ECU bracket to help support it, lastly the Ethanol sensor was mounted to the backside of the ECU bracket with a 3d printed mount I found online, the ECU had to spaced out with a washer to allow the nuts holding the sensor bracket to clear the ECU plugs so they could be plugged in easily, the factory ECU cover still went on just fine, as for mounting the battery I had a friend make me a aluminum tie down for the top(yes those are Metroids on it!), for the front I bought some long M6 Bolts off amazon and actually used the one bolt hole holding the airbox bracket on as a mount point so essentially the bolt goes through the tie down and right into the factory threads, for the rear tie down I bought a $6 set of j-hooks from advanced and drilled a hole in the steel mount underneath to slide it through.
I ended up using Russell fittings to adapt the SAE ports on the motor and sensor to 6AN and used earls Ultra-pro hose connect everything up.
The gauge itself is installed in the glove box with a gauge pod I got from Speed of Sound, all in all I was very happy with how it turned out and wanted to share, hopefully it gives others some ideas for things as well.
Once I removed the factory battery and box there is a nice steel plate mounted on top of the motor mount bracket, this same plate has the support bracket for the airbox bolted to it for reference. that plate happened to allow a B3121 to sit on it almost perfectly, ended up welding a piece of steel leading off the edge of it following the same line as the factory battery box which allowed the ECU mount to bolt right to it (pictures will probably help explain it better) and on the opposite side of the plate a small piece of steel with a 90 deg angle facing up was welded on to support the battery on the fuse box side, there was also a piano brace welded from the lower strip to the backside of the ECU bracket to help support it, lastly the Ethanol sensor was mounted to the backside of the ECU bracket with a 3d printed mount I found online, the ECU had to spaced out with a washer to allow the nuts holding the sensor bracket to clear the ECU plugs so they could be plugged in easily, the factory ECU cover still went on just fine, as for mounting the battery I had a friend make me a aluminum tie down for the top(yes those are Metroids on it!), for the front I bought some long M6 Bolts off amazon and actually used the one bolt hole holding the airbox bracket on as a mount point so essentially the bolt goes through the tie down and right into the factory threads, for the rear tie down I bought a $6 set of j-hooks from advanced and drilled a hole in the steel mount underneath to slide it through.
I ended up using Russell fittings to adapt the SAE ports on the motor and sensor to 6AN and used earls Ultra-pro hose connect everything up.
The gauge itself is installed in the glove box with a gauge pod I got from Speed of Sound, all in all I was very happy with how it turned out and wanted to share, hopefully it gives others some ideas for things as well.