Rusty_S85 Posted April 15, 2020 Share Posted April 15, 2020 Ive seen it mentioned over the years quite a bit that EFI 302`s still had the fuel pump eccentric mounted to the timing chain. Since I am going EFI on my 306 build but I want to have the ability to revert if need be due to problems I am thinking of mounting the two piece fuel pump eccentric I have on my comp cams energy double roller. Question that I am wondering about is, with a two piece eccentric would there be a rattling noise from the front of the motor from this eccentric with the engine running with no fuel pump sitting against it? Link to comment Share on other sites More sharing options...
myrl883 Posted April 15, 2020 Share Posted April 15, 2020 You shouldn't hear a thing. When Ford was changing over from carburetors to EFI, we saw a good number of EFI engines with eccentrics installed. Link to comment Share on other sites More sharing options...
Angelo Voltura Posted April 15, 2020 Share Posted April 15, 2020 No, they should not make any noise. Once its running the velocity from engine rotation will have that thing spinning so fast it will essentially orbit. If a 2 piece design bugs you, they did make 1 piece eccentrics in the 70s engines that are available. Link to comment Share on other sites More sharing options...
Rembrant Posted April 15, 2020 Share Posted April 15, 2020 I disassembled a 302 EFI engine from a 1985 F150, and it only had the inner piece of the two piece eccentric assembly installed from the factory. It certainly wouldn't make any noise that way, but I'm sure a 2pc would be fine. A lot of people go with electric fuel pumps for various reasons and leave the eccentrics installed. It's nothing that I'd worry about. Pic below of 1985 302 EFI engine: Pic below of 1984 carbed engine from my truck: Link to comment Share on other sites More sharing options...
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