Megane R26/225 uprated fuel pump options

Stock one is a Walbro.

You can take the housing apart and upgrade the pump itself but you'll probably break it and it's a waste of time. I have had mine replaced recently with a brand new one and it's made a huge difference and paid for itself by increasing my mpg. Everything I read suggested an external pump, rewire, lots of money etc or stick with standard.

I considered rebuilding my old pump and even bought one from a breaker to use while I built up the new one but couldn't be arsed in the end. I still have it and you can have it for free and if you want to have a go.

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@ewant81 is running dw65c, direct swap for standard pump, some are running walbro 255, again drop in pump

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255 was the one I bought

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http://m.ebay.co.uk/itm/DEATSCHWERK...Fuel-Pump-With-Installation-Kit-/121952758007

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Just the pump. Came from eBay. Housing contains pump, regulator, float, thing that looks like a tea strainer that's supposed to be a filter. The limiting factor appears to be the standard fuel rail which can apparently be upgraded with a 197 version from ktec. Leans out, boom, etc.

If running big power it's a different matter however and the 250/265 pump is supposed to be a decent upgrade as can run more pressure

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Be really interested to see a picture of the setup when you get that done.

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http://turborenault.co.uk/index.php?threads/67776/

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https://m.facebook.com/groups/2261419232?view=permalink&id=10155304396904233

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Would recommend the dw65c pump, very quiet and is a direct fit. You don't need the installation kit, and if you buy one don't get the one with installation clips.

Strongly advised to wire in a better electrical feed to the pump switched with a relay off the standard wiring. Most uprated pumps will pull more current and the standard wiring is fused inside the UPC. If you blow that you will not be happy!

This won't solve the running lean on cylinder 1 issue, but will replace what could be a very tired OEM pump.

If you want higher rail pressure then you need to change the fpr at the pump body and get a map. Or you can go down external pumps with swirl pots.

Don't have to get a new fuel rail with return line for swirl pots, there is a swirl pot with external pump that is designed to work on a returnless system.

http://www.radiumauto.com/FST-R-Fuel-Surge-Tank-with-Integrated-FPR-P348.aspx

The mk2 fuel system isn't too clever because the swirl pot in the intank fuel body is too small. To help avoid fuel surge, it's advisable when on track to not let the tank go below 1/2 full. Not a perfect solution, but it's the least you can do.

Also, even if you uprate the fuel pump and fit a higher pressure fpr, you will still have fuel surge issues. They will probably be worse as you are potentially lifting more fuel!

It's a bit of a pain in the arse on the mk2. The mk3 solved a lot of issues by having a better fuel tank and pump body that ran 5.5bar fuel pressure to the rail. At the rail it had a secondary fpr that was vacuum referenced. And to polish it all off, the mk3 fuel rail was fed from the centre rather than from cylinder 4 end.

 

But that price of that kit!!!

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Yeah, that might work. Might still have fuel surge issue with the standard pump body but it would be a step up from what on the mk2.

Trouble is finding a fpr that fits in the standard fuel body. The mk3 will fit if you machine down the tip a little, haven't tried it myself but there is a guy who has done it.

 

I was put off the walbro as they have been know to be quite noisy. But my OEM pump was squealing like a bitch so I probably wouldn't have noticed!

 

Yeah walbro for now, and will be saving for the swirl pot, return rail, fpr and new lines.

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By the time you got the rail, swirl pot, additional external pumps and fpr, fuel lines, wiring, you are well into some big money. Then you need to get it fitted and mapped. It gets expensive!

Good luck though, the more people that do it the more knowledge we get on the best way [emoji846]

 

It is big money. I was looking for a cheap solution but there is non. More pressure needs new lines(don't trust the standard lines) new pump fpr and a map.

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You can get the part numbers from the parts listings which are available on some web pages. There was a sticky on here somewhere that gave a page.

Edit: it's a sticky on this forum section! [emoji23][emoji23][emoji23]

 

Ah, the standard pump is a Bosch unit anyways. I listed the parts numbers on another Turbo Renault related forum, hint hint. I had a good look online and I couldn't find it.

Your options are limited, I would just buy aftermarket and take the hit.

 

Can you run a return into the standard housing?

 

Would it not be possible to run the clio 172 phase 1 pump housing with a 255 pump in there than a custom rail and fpr in the bay, that way you have a stronger pump, a return line and adjustable fuel pressure?

 

Good effort buddy I'm keen to hear the outcome of all this research . . .

I'm running Stage 2 on a 100k+ engine and it never really occurred to me! I knew the fuelling was the limitations on the F4RT engines . . .

I thought RS Tuning in Leeds would have come up with a solution by now!?

 

I am using the dw65c, it's a direct swap for the standard OEM pump.

I haven't been able to find anyone that stocks the OEM pump, and the chances are it's about the same cost.