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Join Date: May 2007
Location: El Centro, CA
Posts: 260
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MFI fuel cut-off relay
is it mandatory to use the mfi fuel cut -off relay? can I get away with not using it?
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05-07-2013, 01:19 PM
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You can run without it but be ready for some enormous trailing throttle backfires. You might cause alarm to the general population and shorten your muffler life. Fit the relay and micro switch.
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1972 911T Coupe with a '73E MFI engine and 'S' pistons 10 year resto mostly completed, in original Albert Blue. ***If only I didn't know now what I didn't know then*** |
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05-08-2013, 01:42 AM
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Bandwidth AbUser
Join Date: Nov 2001
Location: SoCal
Posts: 29,522
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Porboynz nailed it. What's your reason for wanting to lose it, greyes59?
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Jim R. |
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05-08-2013, 02:31 AM
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Ran without for 18 years, stinks like hell on throttle lift, no back fires, ever, sooty plugs, car ran great. Up to you.
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72 911 Although it is done at the moment, it will never be finished. |
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05-08-2013, 02:56 AM
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Location: El Centro, CA
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I do not have the rpm sensor in the first place. i only have the microswitch and now my ignition is clewettt engineering xd-2 so I do not know how to sense rpm. are these realys for sale?
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05-08-2013, 03:45 AM
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I had to fix mine as my 2.4 back fires like a cannon without it. If you can not find a stock replacement there are aftermarket RPM actuated devices that will do the job. I think even an aftermarket rev limiter could even do the job if you could set it for say 1400 RPM.
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1972 911T Coupe with a '73E MFI engine and 'S' pistons 10 year resto mostly completed, in original Albert Blue. ***If only I didn't know now what I didn't know then*** |
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05-08-2013, 10:23 PM
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Join Date: May 2007
Location: El Centro, CA
Posts: 260
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a very good idea thanks!
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05-09-2013, 12:32 AM
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Check this kit out, there will be an equivalent in the US (Radio Shack maybe?)
Frequency Switch - Jaycar Electronics
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1972 911T Coupe with a '73E MFI engine and 'S' pistons 10 year resto mostly completed, in original Albert Blue. ***If only I didn't know now what I didn't know then*** |
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05-11-2013, 10:07 PM
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Join Date: May 2007
Location: El Centro, CA
Posts: 260
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thanks for the info!
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05-12-2013, 08:16 AM
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1972 Porsche 911T
Tobluforu
