WTB any working 2.0 FI Injectors, Will pay top dollar, semi-urgent Options

[Such914]

Hello, I have a bit of a "Sob" story here. I am a college student with a '74 2.0, and I am (Hopefully) driving home next Friday. I am working with a shop to get my car back to FI, but today I learned that my injectors are cracked. No companies currently stock rebuilt ones, and Auto Atlanta is out. If anyone has any good ones, I will pay top dollar (whatever that is) and have them overnight shipped. I would like the best ones I can find, but beggars can't be choosers. Thanks in advance to the best automotive community out there!

Thanks,
Christian

[McMark]

*** I made a new thread in The Garage since this has broader value and may get missed in the classifieds. Click here to respond to this post. Let's move the HiJack over there. (IMG:style_emoticons/default/wink.gif) ***

That question made me dig in deeper. So I collected the following info for stock injectors. The critical piece when comparing injectors is the testing fuel pressure. I was able to look up the flow-report some other members had posted, which show the after cleaning flow rates. A set of 2.0 injectors flow tested at 42 lb/hr, confirming the 380cc @ 2bar rating that's been passed around. So using that, I built the following table using the typically reported flow rates for the other stock injectors.


The FiveO injectors don't explicitly state their testing pressure, but industry standard is 3-bar. So using the chart above you can find the best fit injectors for stock replacement. BUT YOU MUST CONSIDER WHAT FUEL PRESSURE YOU WANT TO RUN. Considering this thread is about a stock 2.0, you either need 450cc injectors at 28psi, OR 380cc injectors at 43psi. And higher fuel pressure improves atomization, so I'd upgrade to 3bar fuel pressure.

and now to get to you actual question, "What injectors to use with a 1911?" you also have to consider the collection of components your using. I'm going to answer this based on the assumption that you're using a complete and correct setup, meaning matching ECU, MPS, etc.
(also note: cam choice can make a difference here too because different cams will have different VE results)

Okay, so here we go:


So a 1911 is 14% bigger than a stock 1.7. So assuming you had a perfect, complete 1.7 fuel injection system (which implies 'perfect' tuning) that you were installing on a 1911, you would use 380cc injectors to compensate for the increase in displacement.

The 1.8 and 2.0 are there as well.

My thinking, as I type this, is that the tuning of the stock fuel injection is tied to the ECU, MPS and Injectors (mostly). So which collection of components you're using would change which 'upgraded' injectors you would need for a 1911.