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Registered
Join Date: Jan 2009
Location: Marietta, Ga (Atlanta)
Posts: 2,970
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Quote:
Originally Posted by wilsonlaidlaw
If I replace the relay with a solid state one, there should not be any requirement for a diode as there is no arc burn on a solid state relay, so no spike to affect the ECU/DEM. My 911 has a rev limiter but it feels like ignition to me but I suppose might be fuel. It cuts in just above my 7200 RPM red line.
Wilson
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The diode is not protection from "arc burn" but rather protection from
back EMF from the collapse of the de-energizing relay coil. It's meant to protect the solid state over rev protection ckt. Therefore, you are correct in that a diode would probably not be necessary as there is no relay coil with a SS relay.
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'80SC Widebody 3.6 transplant Anthracite "The Rocket"
Long gone but still miss them all:
'77 911 Targa, '72 BMW 3.0CS Coupe(finest car I ever had!)
'71 911T Coupe White, '70 911T Coupe Blue
'68 911 Coupe Orange, '68 911L Soft Window Targa
Last edited by uwanna; 10-27-2018 at 09:40 AM..
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