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| Air Sensors injectors [message #324942] |
Sat, 14 October 2017 13:20  |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
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Senior Member |
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I 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 enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
[Updated on: Sat, 14 October 2017 13:22] Report message to a moderator |
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| 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: 5
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Senior Member |
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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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| Re: Air Sensors injectors [message #324990 is a reply to message #324942] |
Mon, 16 October 2017 06:28 |
Chris Tyler
Messages: 458
Registered: September 2013
Location: Odessa FL
Karma: 7
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Senior Member |
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I have one of the old N8 analog systems. Have run it on a couple of vehicles. While not as sophisticated as more odern units, they work pretty well if you have tuning skills. Much easier if you invest in a wide band AF meter
I have wondered what injector size I could move up to as well and if anyone knows a specific interchange to get the 80# size Id like to know.
On the dyno I was maxed out right at 400HP at 55# psi- so I believe I have the 52 # injectors. [406 SBC that also made 525/ft] THat would be right in the range for the GMC application and leave a little room
Someday I may try to mate it up with the 455 and a low [5-7#] boost turbo built more for torque than HP
76 Glenbrook
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| Re: Air Sensors injectors [message #325000 is a reply to message #324990] |
Mon, 16 October 2017 12:36 |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
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Senior Member |
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I was under the impression they were 30lb injectors with the fuel pump 39lbs ? Wally's information seems to have run me into a wall so far. The throttle body's(Ford) that use the injectors seem to only be available complete, no separate parts like injectors. I'm still looking though.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
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| Re: Air Sensors injectors [message #325036 is a reply to message #324942] |
Tue, 17 October 2017 05:30 |
Chris Tyler
Messages: 458
Registered: September 2013
Location: Odessa FL
Karma: 7
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Senior Member |
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In larger cities there is usaully a facility or two that cleans /flows/exchanges injectors for HiPo applications. Im thinling they could ID them
The injectors I have look like rail type wrather than TBI type injectors. A holley projection I have has 4 TBI type injectors
76 Glenbrook
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