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Anyone know of examples of retrofitting Magnum EFI on to an LA long bl

5974 Views 4 Replies 4 Participants Last post by  Gil Brannan
I was just curious if anyone has ever seen an example of someone installing Magnum-era EFI on to an LA block. There are some intake manifolds that somewhat resemble carbureted manifolds for the air intake, but have holes for fuel injectors, and it made me wonder, if those are capable of bolting to LA heads (thus leaving the LA head oiling system intact on LA blocks) then what else, on the engine itself, would be necessary? There's obviously some kind of position sensor, and possibly a knock sensor or two, a throttle position sensor, possibly a MAF sensor as part of the throttle body, a distributor meant for EFI, and some other changes, plus things like oxygen sensors.
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The hardest thing to get done would be the crank position sensor. There is no provision on the LA block for it, and not really much of a way to mount it to the block accurately with bracketry etc. You could potentially go with a crank trigger setup, but that will depend on what you are using for an ECU. If you are trying to stay factory, I dont think any of the aftermarket crank triggers put out the right signal for the factory style ECU to interpret. If you go aftermarket ECU ( Fast, Accell, Mega-Squirt etc ) then you can use the Accell dual trigger distributor that will give both crank and cam readings to the ECU.

Cam sensor is actually in the distributor, and a Mag distributor will drop right into an LA. Use a Magnum TB or one of the many aftermarket billet varieties and use the stock Mag IAC, TPS and MAP sensor.

For a splash of cool, try this Scroll about half way down for the 6 barrel TB setup on a factory sixpak intake.

Hope that helps

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