Can anyone tell me if a conversion of the 280 engine from carb to fuel injection is straight forward? Do I only need to find a donor car with fuel injection and get the intake manifold, fuel injection parts and make the swap? I can deal with the moving of parts and rerouting of fuel, linkage and air cleaner. I understand the fuel pump will need to be added. What else is involved? I expect better fuel economy and more power are the result of the swap. What else is involved and required?
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benzfleet
1973 280 W114 (Driver - 140,000 miles)
1974 280C W114 (Now running - new suspension bushings this winter, but must replace the driveshaft carrier rubber before I can drive again.)
1968 200D (Engine rebuild planned??)
1964 200 (gasser parts car) & 1966 200D (complete car - maybe I can get it running - not yet, but made some smoke!)
1980 300D W123 (Parts car - engine runs, but trashed inside and out )
You will also need a fuel pump relay, canister-type fuel filter, fuel accumulator, fuel damper etc. Relatively straight-forward, but quite a bit of work nonetheless.
You will get slightly more power, but I doubt you'll see an appreciable fuel savings.
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Felicita e un bicchiere di vino con un panino.
It would be a lot less of a project to just get a used motor, since you need so many parts. There's a guy near Philly that has what you want, if you really want to convert the motor.
The hard part, swapping the head. You might as well get a valve job or re-ring the motor while you've got it off.
Vehicle: '73 280SE 4.5, 73 280C (sold), 65 220SEb (stolen), 03 BMW Z4 (upcoming death trap/prison sentence)
Location: Chula Vista, CA
Posts: 237
If the issue is the carb itself, have you thought about a Weber carb kit? I bought one for my 280C, years ago. For about $400, you get the mating kit, the carb, and any other hardware you might need to do it. In all, it took me 20 minutes to do the swap. You reuse the old air cleaner and everything - no tinkering or post-engineering needed. Weber also has different jets that you can install for different things (such as performance mods, etc).
If the issue is the carb itself, have you thought about a Weber carb kit? I bought one for my 280C, years ago. For about $400, you get the mating kit, the carb, and any other hardware you might need to do it. In all, it took me 20 minutes to do the swap. You reuse the old air cleaner and everything - no tinkering or post-engineering needed. Weber also has different jets that you can install for different things (such as performance mods, etc).
Not as bad option at all, but I believe you'd be hard pressed to pull that off for $400 these days...
So, if I will need to replace the fuel supply system, intake manifold, head and block, I should just remove the oil fill cap, insert a complete fuel injected engine into the car and replace the oil cap!
that would do it. BTW , as spare parts, the are the same head. However, they close off the injection openings permamently to install them on a carb'd motor.
If you are mechanically injenious, you can send the current motor to a shop and have injection ports bored. But that would not be cheap and it's very experimental.
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