I just purchase a 68 280s for $500. it starts fine but it can not drive the guy I bought it from says said that it might be the ignition, starter, or carb., he also said that he know nothing about benz.
I inspected the car and he change the oil, spark plugs hoses. this i will be rebuiling the orginal m130 manual stright 6cy engine and will like to change the mechanical fuel pump to a bosch- d jetronic electric fuel pump.
the question is: can it be done? has anyone done it before? will I have to change the compression ratio?
i will also like to add a turbocharger. my main goal is to achive a better power and better fuel economy.
thanks guys in advance.
ps will like to hear from mechanical engineers or all you benz guru out there
peace
dpl

Ehhh? It should be a carb'ed engine and as such it would have no use of the 4 bar fuel pressure. In fact, you'd blow the guts out of a carb under those pressures.

You can eliminate the mechanical pump and replace it with either a good Carter vaned pump or install a small "pusher" pump located back at the tank area.

If you are thinking of changing it to a CIS or D-jet style of fuel injection then you are really going about it the hard way.

What carb set-up do you have on it now? The twin Zenith's or the single Solex?

Turbocharge an M130? Why? You're still going to be trying to push a 3500 lb car down the road. You are not going to be gaining enough ponies to make a significant difference in economy and if you don't use an intercooled system you will fry that aluminum head in no time flat.

I'm not trying to discourage you but I also don't want you to try to make a silk purse out of a sow's ear.

Make that old beauty purr and enjoy it for what it is. It's never going to get 25 mpg or going to do 14 second quarter miles. It's a smooth old cruiser.

Replacement fuel pumps are available, so just replace it. No need for an electric one. If you do still want to change to an electric one, get a low pressure one, as previously stated. There is a return line for the excess fuel.

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Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.

thanks guys for all your support. thats why I am asking your advice.
I am not going to change the fuel pump of my 68 280s from manual to electric fuel pump just going to replace it or rebuild it. I will not add a turbocharger either.
Diffrent topic on the same car:
The starts but it will not drive, if it decides to drive it takes over 1 or 2 hours before it can turnover.
Question: Could it be the starter or ingition? or maybe the carburetor?
thanks dpl

If the car was sitting a long time (like over a year), then chances are the carbs are gunked up.

Once it's idling at about 800 rpm, look down the carb throats with a flashlight. If you see fuel actively moving from those little round ports in the center of the carb then your idle air passages are clogged up or the carbs are severly misadjusted.

The repair is tedious (unless you really, really like rebuilding carbs), but it's doable by somebody with patience and mechanical aptitude.

-CTH
-CTH

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Fuel pump isn't working but when I pulled it off it seemed to work when you pumped the arm. The actuator rod doesn't move in and out when you crank the engine, so assume thats the problem. Is that fixable? or should i just install an aftermarket? I have dual carb zenith setup.