Author Topic: Electric fuel pump pressure/flow rate  (Read 6390 times)

Albert

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Electric fuel pump pressure/flow rate
« 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

Garry

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Re: Electric fuel pump pressure/flow rate
« Reply #1 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
Garry Marks
Melbourne/ Kyneton, Brisbane. Australia
1969 MB 280SL 5 speed RHD SOLD.
1965 MB 230SL Auto RHD Lt Blue 334G, Top 350H, Tourist Delivery.
1972 MB 280CE Auto RHD 906G
2005 MB A200
2006 MB B200
2019 Izuzu DMax 4x4 Slide-on camper.
2022 Volvo XC40 Electric
2024 Volvo EX30 Electric

stickandrudderman

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Re: Electric fuel pump pressure/flow rate
« Reply #2 on: October 19, 2014, 21:43:46 »

Albert

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Re: Electric fuel pump pressure/flow rate
« Reply #3 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

ctaylor738

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Re: Electric fuel pump pressure/flow rate
« Reply #4 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.
Chuck Taylor
1963 230SL #00133
1970 280SL #13027 (restored and sold)
1966 230SL #15274 (sold)
1970 280SL #14076 (sold)
Falls Church VA

Albert

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Re: Electric fuel pump pressure/flow rate
« Reply #5 on: October 27, 2014, 12:50:08 »
Thanks
For everyones info:
1 ATU = 1bar
1 ATU = 14.504psi

stickandrudderman

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Re: Electric fuel pump pressure/flow rate
« Reply #6 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:



Albert

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Re: Electric fuel pump pressure/flow rate
« Reply #7 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
« Last Edit: October 27, 2014, 19:10:22 by Albert »

Shvegel

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Re: Electric fuel pump pressure/flow rate
« Reply #8 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.