Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: Albert on October 19, 2014, 20:37:00

Title: Electric fuel pump pressure/flow rate
Post by: Albert on October 19, 2014, 20:37:00

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

Title: Re: Electric fuel pump pressure/flow rate
Post by: Garry on October 19, 2014, 21:41:50

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

Title: Re: Electric fuel pump pressure/flow rate
Post by: stickandrudderman on October 19, 2014, 21:43:46

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

Title: Re: Electric fuel pump pressure/flow rate
Post by: Albert on October 27, 2014, 12:11:03

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

Title: Re: Electric fuel pump pressure/flow rate
Post by: ctaylor738 on October 27, 2014, 12:26:43

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.

Title: Re: Electric fuel pump pressure/flow rate
Post by: Albert on October 27, 2014, 12:50:08

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

Title: Re: Electric fuel pump pressure/flow rate
Post by: stickandrudderman on October 27, 2014, 16:55:36

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:

Title: Re: Electric fuel pump pressure/flow rate
Post by: Albert on October 27, 2014, 18:45:17

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

Cheers
Al

Quote

Title: Re: Electric fuel pump pressure/flow rate
Post by: Shvegel on October 28, 2014, 01:45:05

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.