As you may already know, I’m in the middle of installing my turbocharged engine into my 240z. It’s been a fairly long and arduous process with a few mistakes made along the way, but overall it’s been a good experience thus far. Since I’m installing this in preparation for a long cross-country trip from Oakland, CA to Boston, MA it’s worth making sure it’s in good working order. I’m starting by double-checking my accessory systems, like the fuel tank, seats, and ignition, and have now made my way to the beating heart of the engine: the fuel injectors.
Fuel injectors are essentially small electronic valves with fluid on one side (fuel) and the inside of the engine on the other side. When they receive an electrical signal they open, spraying a precise amount of fuel into the engine, hopefully matching the amount of air entering the engine exactly.
After a quick visual inspection of my original fuel injectors, I decided that a replacement was in order. The wires were cracked and brittle after years of heat from being soaked in hot air emanating from the turbocharger. A few of the pintles (the valve itself) were broken off, causing inconsistent fuel delivery. Lastly, the injectors fitted on the engine from Nissan are rated at a measly 275cc/min, meaning that in one minute, they could fill a 275cc container with fuel. I already have a larger turbocharger set up for the engine, so I’ll need to increase my fuel capability to keep up with the increase in airflow. While there are ways around purchasing larger injectors (such as increasing the fuel’s pressure), I was uncomfortable going that route. These factors provided me with ample reason to start shopping for something new.
I ended up ordering my injectors through osidetiger, an online injector cleaning service provider. After a few back-and-forth emails, I decided upon a set of 480cc/min injectors, offering nearly double the fuel supply. At under $200 completely refurbished and flow-tested, I consider them to be a superb deal, and that’s not even counting the mounting hardware. Osidetiger took things a step further, including new allen-head stainless steel mounting bolts, spacers, washers, electrolyte grease, injector wiring connectors along with lengths of wire (pre-stripped, even!), some solder, and all the miscellaneous bits and pieces that are required to fit the new injectors.
The only downside I came across was the pintle caps. They simply don’t fit inside the factory n42 or n47 intake manifold injector holes. That means I’m forced to use these injectors without pintle caps, which changes the spray pattern of the injectors. Maybe someone can explain why the caps are important better than I can, but my understanding is that a boundary layer of air causes more turbulence for the fuel and air to mix in.
Overall, the experience with the vendor was superb. They gave me a sheet with the exact specifications of the injectors, everything required to install them (even solder!), and their communication is some of the best I’ve ever seen. I don’t have a way to double-check their work, but I’m confident that they’re honest about their processes and results and that’s good enough for me. They offer injectors for practically any application you could want, and it looks like they purchase used injectors and refurbish and clean them. The results are quite simply superb. I expect this company to build up a very strong reputation if they continue along the path they’ve been headed down.
My beater's better than your Beamer.