06-02-2014, 10:17 AM
Join Date: Oct 2006
Location: Lexington SC
Total Cats: 12
EV14 GT500 630cc injector DIY
After reading some of the recent DIY attempts to get cheap EV14 injectors working and finally getting my turbo installed I figured I would try to make the cheap GT500 630CC BOSCH injectors work.
I found a set of the Motorcraft Part# CM5216 injectors for $102 shipped. You can find these all day long for $110.
You can look them up under 2013 Ford Mustang GT500 parts. I ordered new o-rings, bottom donuts and filter baskets from 300zxrb26dett on the forum. I found new EV14 connectors on ebay for around $4.50 a piece and will be making a new harness.
I had some ¾” round aluminum stock laying around so I figured I would try to make my own top hats, but you can find these for $40-50 bucks on Ebay. The EV14’s are a lot shorter than the old EV1’s, but by the time you open the lower opening of the hat to fit the EV14 (0.520”) and turn the upper portion to fit the miata fuel rail(0.410”) you end up with little or no material left in the transition area. Myfist one was made to exact same length as the old 1.6 injector I had laying around (from bottom donut to upper cushion seat). This left very little material and I ended up snapping the top off during trail installation, it was paper thin. I added about 0.100” to the length to add a little more material and it works great. I might have to add a thick washer on the fuel rail spacers or make new spacers.
The green lower o-ring supplied with the EV14 injector is too small to seal on the head/intake.I first thought a separate adaptor would be needed, but I tried replacing the green o-ring with one of the EV1 lower donuts and it works. As you can see inthe pics it is not a perfect fit, but the slightly increased OD of the donut on the one edge actually allows for a better seal on the head/intake. I had an old 1.6 intake manifold lying around and did a test fit. With some oil on the donut you can slip it in and it seals much better than the plain donut on an EV1 injector.I always wondered if the factory donuts seal under boost. I had a little harder time to get these guys to fit when installing it on the 1.8 head, but a little guidance from a long flat tip screw driver helps to get the donut guided in and sealing properly.
I was able toget it all installed this weekend with no leaks. I pinched one of the upper o-rings in the fuel rail and had a leaker on #3 during my first attempt. A little more lube and a new o-ring fixed that problem.
Next step is to wire up the new connectors and run new wire all the way to my MS2 for batch fire in the short term and eventual sequential operation. I am also wiring everything in for eventual COPs.
In one of the other threads there was a question about the injector squirting in a dual cone pattern to direct fuel at each valve, but looking at the injector tip it does not appear to be the case with so many holes in a circular pattern. I would expect these injectors to produce a single cone spray pattern. Has anyone tested theseto know how they spray? I was going to run some alcohol through them to see,but got excited and installed them instead.
The 1.8 installation does not allow a lot of room to rotate the connector around since the new injector sits much lower and the connector will contact the head in certain positions.
I will update the thread when I get it wired up and running.
Last edited by Rallas; 06-02-2014 at 12:01 PM.
Reason: added link for injectors