Club G40 Forum
Technical => Engine and Transmission => Topic started by: gavin.starr on March 15, 2011, 05:17:43 pm
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Has any one come across one this cheap before, and is any one using one they can report on.
http://www.fuelpumpsonline.co.uk/vw-polo13i-g40-main-pump-fuel-pump-1730-p.asp
Cheers
Gav
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i wouldnt say that is cheap?
i bought a new standard g40 pump when i rebuilt my g40 and 4 years on it is still working fine
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They are good pumps, But not cheap. The best thing to do is think to yourself am i going to tune the car if you are it may be worth fitting a beefier pump now instead of having to spend the same money again further down the line
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I thought the pumps from vw were alot dearer than that, where did you all get yours from then if this one is expensive
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Anyone know if this bad boy has the same or greater flow rate?http://www.fuelpumpsonline.co.uk/vw-golfmk-ii-18-g60-syncro-fuel-pump-1654-p.asp
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since neither state what their max flow rates are, it's a bit hard to say. I would assume that a pump intended for use in a g60 will be as high a rate if not more than one intended for a g40 but then you know what they say about assumption...
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I have just sent them an email regarding the pump in my first post this was there response.
Hi Gavin,
This is the Walbro GSL391 pump (FP603). More details here;
http://www.fuelpumpsonline.co.uk/walbro-fuel-pump-190lph-gsl391-583-p.asp
Another alternaltive is Sytec 0TP017;
http://www.fuelpumpsonline.co.uk/sytec-external-in-line-fuel-injection-pump-otp017-1931-p.asp
Both pumps are in stock.
Kind Regards
Vicky
Temple Tuning Ltd
Vat Reg No: GB 891142328
http://www.templetuning.co.uk
http://www.fuelpumpsonline.co.uk
Tel 0117 9078569
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Yo thought I might drag this one up again.
what are the desired flow rates for G40s these days? I used a Bosch motorosport 044 in my S4 which was really good but Im assuming that will be total over kill in my Turbo G40.
Is there a favourite fuel pump for our wee beasties?
also my lift pump looks in good order but are these worth replacing as we all know our cars are all getting on a bit.....
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Id also like to know the answers to the above... Whats are nice upgraded fuel pumps for a good power g40 turbo?
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the vast majority of people are using standard ones. they are good for over 200bhp.
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It'd be nice to know the specs of the G40 pump though.
I'd like to get a new genuine Bosch pump but from what I understand, they are only available new through VW and very expensive.
Is there a specs. PDF file that we can compare flow rates etc like there is for the injectors? It's highly likely there is a Bosch pump available that could be used and might be cheaper due to greater demand.
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I researched the best-fit Bosch universal replacement a few months ago, but in the end didn't actually buy one. Obviously you've got the consider voltage, pressure, flow rate, hose connections and electrical connections. I found the Bosch 0580464070 matched well, though the flow rate is high but not nearly as high as the '044. You'd need to adapt the electrical connections though (crimp on eyelets probably).
When I looked they were £85 on eBay but look to be more like £100 now.
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G40 pump is 75 l/h at 3 bar.
75 l/h is 1250cc/min, i.e. roughly equivalent to four 310cc injectors at 100% duty cycle. I've yet to map any G40 that needs to run 310cc/min injectors static, though Yoof's isn't miles off.
Obviously it's not quite as simple as that, as you want some headroom to cope with transients, and also you need to know what the pump does above 3 bar pressure given that it's for a boosted motor. A 200bhp G40 needs approx 1000cc/min = 60 l/h, which leaves you a bit of headroom for those transients.
I've tested my own motor with a 130 l/h Bosch pump and the stock 75 l/h one, and I'm running just over 200bhp. The fuelling shows no differences, even on high boost transients, between the two pumps. However, unplug the inline pump and run just off the lift pump and it starts to go lean on transients and even leaner at high rpm/high boost. Though not lean enough to make it run like a total sack of shit, which is probably why people don't notice they've got a dead/dying inline pump - especially if it decays gradually.
There are loads of pumps available that do more flow at 3 bar, but I've yet to find one that uses the same electrical connectors, so it means a bit of cutting and crimping. I've been trying to find the correct mating-half connectors for the G40 pump, that way I could make people automotive grade link harnesses to hook up an 'uprated' pump to their existing wiring. If/when I find one I'll let people know!
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I researched the best-fit Bosch universal replacement a few months ago, but in the end didn't actually buy one. Obviously you've got the consider voltage, pressure, flow rate, hose connections and electrical connections. I found the Bosch 0580464070 matched well, though the flow rate is high but not nearly as high as the '044. You'd need to adapt the electrical connections though (crimp on eyelets probably).
When I looked they were £85 on eBay but look to be more like £100 now.
That's the best alternative. Still haven't found a flow rate vs pressure curve for it, but it does quote min flow as 130 l/h (max 195 l/h) at 3 bar rated pressure and max pressures of 4.5-8.0 bar.
It's worth mentioning voltage to the fuel pumps too - seem to remember a thread from eons ago written by a certain Mr (confusion)Hunter where he'd sorted a G40 running issue by running a new fuel pump harness.
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http://www.bosch.com.au/content/language1/downloads/fuelpumps.pdf
The pump I mentioned about flows 130L/hr too so probably the one you tested maybe Andy?
Fast typer!
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The point about the harness - I found the same! http://www.polog40.co.uk/forum/index.php/topic,7361.msg52403.html#msg52403
Cleaned up the idle no end
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yes I ended up running all sorts of fresh earths and power cables to avoid voltage drops etc.... made the car sweet as a nut! Poor 20 plus year old wiring looms just dont cut it anymore!