Electric fuel pump pressure/flow rate

[Albert]

Hi All,
I have a 1971 280sl which has a dodgy old Bosch  short fuel pump installed underneath.
I'd like to replace this unit with a new style reliable Bosch fuel pump.
If I can confirm the flow- rate & pressure I can cross reference for an up to date model.
Please help

Al

[Garry]

Albert,

All you ever wanted to know includung the specs are in the Tech Manual for both early and later fuel pumps.

http://www.sl113.org/wiki/Fuel/FuelPumpRebuildLater

[stickandrudderman]

This might also be of interest:
http://www.sl113.org/forums/index.php?topic=20410.0

[Albert]

Thanks Guys but there is no reference to fuel pressure, flow rates etc

The Latest pump available is F 026 T03 006 but I'd like to install one of the bosch motorsport variety

Al

[ctaylor738]

Pressure is .8 - 1.1 atu, measured at the cold start valve.  1.3 atu if you close the return line.

Flow is not less than one liter in 15 seconds, measured at the return line.

[Albert]

Thanks
For everyones info:
1 ATU = 1bar
1 ATU = 14.504psi

[stickandrudderman]

Pedant mode on:
1bar MAY = 14.504psi or it may not, it depends on the atmospheric conditions on the day.
1 bar=1 atmosphere.
Pedant mode off:

[Albert]

I understand atmospheric pressures but you know what I mean.
From this info I can spec an alternative fuel pump.

Cheers
Al

[Shvegel]

Flow is much more important than pressure. Since there is only a restriction in the outlet of the Injection pump and fuel in non compressible if you are over pressure it shouldn't really matter unless your injection pump is leaking by the pistons before hand.  Flow on the other hand is important in that it provides cooling for the injection pump. I had a fuel pump from a Saab on my car for a couple of years with no ill effects.