75zcar Posted August 18, 2010 Share Posted August 18, 2010 (edited) I picked up a '75 280 that had the motor pulled but a 5 spd trans still bolted up under the car. I have a 260 motor that had an auto trans attached, but im sticking w/ the 5 spd trans (of course) along with staying with the carbs. My questions are: 1.) What can I do about the efi fuel pump, bc i have read its too much pressure but wasnt able to find a solution in the search 2.) Any other things i may need for the swap or need to watch out for? Edited August 20, 2010 by 75zcar Quote Link to comment Share on other sites More sharing options...
75zcar Posted August 20, 2010 Author Share Posted August 20, 2010 Any help would be great, I'm ready to drop in the engine just not sure what I can do about getting the fuel to it. Quote Link to comment Share on other sites More sharing options...
NewZed Posted August 20, 2010 Share Posted August 20, 2010 (edited) Your 260 motor should have a mechanical pump, on the front right side of the engine. The 260 cars came with an additional low pressure electric fuel pump, in series with the mechanical pump, but it was added mainly to combat vapor lock problems in hot climates (as I understand it). Some people remove the electric pump and just run the mechanical or vice-versa. You could get your car going with just the mechanical pump, then add the electric later if you decide you need it. It's not necessary though if your mechanical pump works. Your EFI pump is made to run at much higher pressures than an electric pump designed for carbs. You can remove it or just leave it disconnected (don't forget to cover the wire ends or disconnect them from the power source). I don't think it is recommended for use with carbs because of the flow rates and the need to add a fuel pressure regulator to your fuel system. I am no expert but I'm pretty sure the above is correct. As far as the other stuff, of course there's a flywheel, clutch, pressure plate, pilot bushing, etc. plus figuring out which wires you need to get the engine to run and which are now extra. There's probably a write-up out there somewhere on converting from EFI to carbs. Edited August 20, 2010 by NewZed Quote Link to comment Share on other sites More sharing options...
NewZed Posted August 22, 2010 Share Posted August 22, 2010 Any help would be great, I'm ready to drop in the engine just not sure what I can do about getting the fuel to it. Apparently I was off on using the EFI pump for carbs. It is workable. Read this recent post - http://forums.hybridz.org/index.php/topic/86730-78-280-carb-swap/page__pid__889403#entry889403 Quote Link to comment Share on other sites More sharing options...
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