| Re: Air Sensors injectors [message #324947 is a reply to message #324942] |
Sat, 14 October 2017 17:23   |
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wally
Messages: 643
Registered: August 2004
Location: Omaha Nebraska
Karma:
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Hal StClair wrote on Sat, 14 October 2017 13:20I just installed an old Air Sensors fuel injection system and am trying to find out what injectors they used. I know it's an old unit but a new system just isn't in the budget at this time.
After the one ton, reaction arm rear, new master cylinder/sensitized booster and all new rubber brake hoses, new T Bar's with adjustable pork chops, new 15,000 A/C, power converter and 1200 watt Xantrex inverter, 3.55 differential, headers and exhaust new tires as well as all new fuel and water hoses, replaced air compressor and air valves rebuilt, this $1000 give away coach has been the epitome of project creep. Sure hope the daughter and family enjoy it.
Anyway, if anyone knows what injectors they used I'd love to hear from you.
Thanks,
Hal
I found the following here http://auto-nomics.s3-website-us-east-1.amazonaws.com/faq.html http://auto-nomics.s3-website-us-east-1.amazonaws.com/faq.html
What type injector and impedance is the AiRSensors N-8A analog or F.I.R.S.T. digital ECU designed for?
The N-8A and its derivatives, (Superjection, N-8A-HD etc.) and the F.I.R.S.T digital ECUs each have four injector drivers, designed for low impedance units. Some modified N-8A ECUs had six or eight drivers installed. The majority of these "peak and hold" injectors we have encountered are of a Bosch design, the type used largely by Ford in their two-barrel throttle bodies (5-liter T-Birds, Mustangs, etc.) Typically, they measure 2-4 ohms. After pressing a barbed adapter onto the injectors, a high-pressure hose then top-fed fuel from a fuel rail. Several different flow rates were available: 36 lb. /hr, 46 lb. /hr, 52 lb. /hr, and 80 lb. /hr. have been seen in use. The fuel pressure regulators were set for either 39 or 55 psi.
Though most low impedance drivers today are considered to be peak and hold designs, the AiRSensors analog units appear to be saturated, (while the digital units appear to be a modified peak and hold), when their current waveforms are examined!
What all this means is that an AiRSensors analog or digital ECU can support one low impedance (peak and hold) injector per driver, or at least four high impedance (saturated) 14-17 ohm injectors per driver.
Wally Anderson
Omaha NE
75 Glenbrook
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