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10-04-18, 08:26 PM | #1 | |
Grown up member
Join Date: Apr 2016
Posts: 53
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Fuel pump upgrade
Hi guys. So I'm in the midst of replacing the engine on my 80. One of many jobs is to replace a rusty fuel line and u got to thinking about replacing the fuel pump as it looks like the original. I thinking of fitting an uprated pump and was wondering what, if any, my options are? As far as I'm aware it's an external pump (haven't had a proper look) so I'm hoping I have a wide range of options.
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10-04-18, 09:00 PM | #2 |
4 ring whore!
Join Date: Jun 2008
Location: Rucava, Latvija
Posts: 3,816
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Changing fuel pump solely because "it looks original", but leaks no fuel and makes no loud noises [although loud pump still could work nicely] is simply waste of time and money. As for "uprated pump" - yeah, if you have an engine with at least 200 bhp and you're going to hit 300 bhp mark, uprated pump will be necessary, but in case you still have stock engine, again, waste of time and money.
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11-04-18, 10:03 AM | #3 |
Grown up member
Classic Audi Club Member
Join Date: Dec 2010
Location: Bingley
Posts: 634
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Leave it alone, the quality of new parts is nothing like ones made 25 years ago, by all means buy a new replacement just in case in breaks at later date but if it in't broke don't fix it.
Be thankful its not a coupe B3/4 we went through 3 pumps during our ownership of a 2.2 quattro before the car was 16 years old and sold, they used to last 2 to 3 years max. Replace the lines I'm surprised they are still original, on all the B3/B4's I've owned the fuel lines were totally goosed by the time the cars were 20 years old so you're definitely on borrowed time. |
11-04-18, 08:25 PM | #4 | |
4 ring whore!
Join Date: Jun 2008
Location: Rucava, Latvija
Posts: 3,816
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Quote:
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12-04-18, 05:58 AM | #5 |
Trickster
Classic Audi Club Member
Join Date: May 2009
Location: Heckling from the cheap seats, Phnom Penh, KoW
Posts: 7,006
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Another consideration before uprating, is ensuring that the pump is getting a good electrical supply. It's old wiring, and old fuse box, expected to supply a fuel pump which is quite a distance from the supply.
There are many URs with a relay modification for this reason. It's amazing what the loss of 1-2volts can cause.
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12-04-18, 09:55 AM | #6 |
4 ring whore!
Join Date: Jun 2008
Location: Rucava, Latvija
Posts: 3,816
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Age of the fusebox and wiring should make no difference, but gauge of original wires aren't very thick. But then again - it's not a turbo engine and therefore not important and also probably pump which is spinning slightly slower will have slightly longer life.
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11-04-18, 10:14 AM | #7 |
Senior Member
Classic Audi Club Member
Join Date: Dec 2013
Location: Back home in Tillicoultry
Posts: 1,308
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If the pump is old yes replace it, but only with a standard pump, price range you will see from under £20 to £100, you may not realize this but the fuel pump runs at over 100% of what the engine needs at full throttle all the time, www.onlinecarparts.co.uk do many fuel pumps that fit your car depending on the model, pumps are normally rated by fuel pressure and flow rate
( 6 bar at 130 Lt/Hr ) make sure you get the correct pump with the correct inlet and outlet pipe/thread size. |
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