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Reply to "Fuel Injection and Electronic Ignition for VW engines - Speeduino Style"

@Stan Galat, I just broke my favorite espresso cup after sleeping for 9 hrs (7+is my usual). I've got a double shot in me now, but I may have to add thoughts later as my frontal lobes kick in.  

If you are going with Paul's gear, get the short injectors to give more side clearance. I've always chosen high impedance because they work right out of the box with the ECUs I've been using. You can make low impedance injectors work with additional circuitry, but it didn't seem worth it (and I've never been disappointed).

I'd trust Paul's recommendation for the 40s. He knows his stuff and has the data to back him up.

On injector size, I'm sure you've read the entire internet on the topic, but the rule of thumb is to size them so at full engine load/output, you're running an 80-85% duty cycle. If you oversize them too much, they spray very short cycles and aren't as precise. On mine, since I was doing a budget conversion, I got a 1/2 price deal on the 17lb accels. That's right at my top range and I worried I'd over run them. Since 99% of injectors are flow rated at 43-45 PSI, I pushed the regulator pressure up to 60 PSI to give me room at the top. No problems.

Injector connectors, more on this after I finish my second double shot and walk some dogs that want to go sniff the world.

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