R26 How to Upgrade the Fuel Pump

hi jukidam is this for stage 2 do you still have to upgrade injectors as well as the fuel pump never attempted anything like this before but i have to do this as well to mine. in the future great write up by the way [emoji1303]


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i want to go for stage 2 anywhere between 270bhp to 280bhp i know you have to upgrade fuel pump but ian plymouth was saying your don’t have to upgrade injectors as well just the fuel pump but i was talking to somebody on facebook and he said you still have to put in 630cc injectors and the fuel pump am confused. com [emoji2369][emoji2357]


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i know i don’t fancy going down that route with the piston out the side of the block [emoji50][emoji24]then i would have to forge not ready for that yet maybe in the future. [emoji2][emoji41][emoji1303]


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i’ll get stage 2 then if anything happens then i forge it. tears of joy tears of joy........[emoji41]


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great job and very well explained, many colleagues can use the information very well

 

As long as you keep the torque and power under 300 you should be okay, most problems with the 225 and the R26 are ring land failure's, this is due to the lack of fuel and pressure at number one cylinder due to the restrictive fuel rail, as far as i know this is only on mapped engines, the standard setup is okay for standard engine.
But who has a standard mapped engine now.

You don't need 630 injectors for up to and around the 270-280hp mark, your injectors will be maxed out by then, fitting 630's will give you a bit more power say 280-290hp but then it's the turbo that will then be the problem.

The fuel pump is a safe guard for a lightly mapped engine, these pumps are getting old and tired now, so reduced pressure and volume is very possible, you could fit another standard pump, but if your thoughts in the future are to even run a 250 turbo or a hybrid then this modification is a must really.

The DW63c pump is good to supply an engine with enough fuel and pressure for around 350hp ish.

hope this helps

 

As long as you keep the power and torque under 300/300 your engine should be fine, but good maintenance is still key though

 

Hi Jukidam, I wouldn´t trust the response from the guy who tested the injector…..if you´ve had the failure on the cyl. where the injector failed, it´s a clear hint that the injector was the reason. If you are going to alter any fuel pressures, you have to remap all Parameters of the injection. First, not the potentially flow from the pump is deciding over your fuel /air Ratio, it´s the fuel pressure regulator what determines the pressure. A bigger pump is only required if you have a lot more fuel demand in case you have more than 370-400 hp, bigger injectors and so on. Then you Need basically a bigger intercooler, bigger exhaust, bigger turbocharger and internal steel parts ( rods) and forged Pistons. From this Level on you might think About a bigger pump. I would install a wide band Lambda measuring tool after the turbocharger to check out whats your fuel Ratio. Should be in the range of 0,7 with full throttle ( estimated). Then your ratio is rich enough to protect your piston from burning.

 

It's a shame you didn't go for a bigger turbo really!

I imagine you'll be able to run a little more power than mine, as you won't need to limit the torque as much, but your main advantage will be raising the rev limiter. I do feel like mine could pull for another 500rpm.

 

Yeah I guess for a daily driver on the roads a nice and safe 300bhp will be a good balance.

Things start to get expensive after the 300bhp mark lol!

 

reading threw this thread is very interesting and also very knowledgable when jukidam explain about the fuel pump it’s alright reading threw it with pictures but coming to do it yourself would be tricky i never done anything like that before that just shows i haven’t worked in cars that much tears tears of sadness.......[emoji24] but willing to have a go[emoji16] so if i go for stage 2 and anything goes wrong i will end up probably forging in the end [emoji51][emoji41]


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As Jukidan has forged his now, the limiting factor is the pistons, they are only rated to 600hp if there Wossners
Conrods ar good for 9k rpm and 1000ftlb of torque

If you want a slightly cheaper option, i have a set of really good 265 pistons and roads spare there good for 360hp 360 ftlb torques, the mappers were saying 400/400 but a few have down graded that now.

I had my rev limit lifted on my 225 by 1k rpm ish, 7300-7400rpm made a real difference on track

 

If you want to have a go at this i'm sure either Jukidam or I can talk you through this, it really is worth doing even if you don't do any upgrades, the original pumps are getting old now.

 

just out of interest ian how much does it cost to forge an engine like these meganes. forged pistons and rods them it’s the labour isn’t it then finding someone who knows there way around these engine and someone you trust don’t want to be doing it twice. [emoji51][emoji2357]


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i should of forged mine when the head was off getting the head gasket done would of been a lot easer having better access and all that. just couldn’t afford it at the time


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https://www.engine-dynamics.com/Eng...25-/-230-Performance-Engine-Build-Level-2.asp

That's before you look at bigger turbos, injectors etc etc

 

I tried not to look at what i spent, it also depends on what deals are around at the time, for example i bought a genuine oil pump for £65, Renault wanted £172, most on line were £150+ .

If you were able to get your car here, i could do it for you, i wouldn't charge you much for labour as i need something to do, i'm so frustrated with nothing to do atm.

I would also suggest replacing the valves and springs, i had a valve drop at Spa a few years ago, it cost a lot of money to sort the problem.

If your engine throws a rod, you are looking at another block and crank, if you wait till it goes bang you can add another £1-2K on top.

That's why i did mine before that happened.

Roughly
Pistons and rods £1100
Valves and springs £600
Gasket sets £140
Oil pump £150
Bearings £175

There are some other bits as well but you get the idea

 

But once the engine is forged, those can be at a later date.

I have a spare block and head, i was thinking of building that up later, but could build it and then swap it over for you.

 

so do they supply the engine already forged or do they use your engine from your car it’s not cheap is it. i’ll put that on my wish list for christmas lol [emoji12]


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Yeah it's an expensive do on a car worth so little!

If you can do.the work yourself, it's an expensive hobby but the pleasure you get from the accomplishment is worth it! If you're paying for others to do it, it's really hard to justify, second hand engines can be had for around £600-£800

 

i would love to do it myself but just not that mechanically minded i have heard of people having a go on here tho but you have still got to know what you are doing talk specs and all that.


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Sure they use your engine, but if there are any bits that can't be reused again will be added to the build cost.

A mate had his throw a rod, bought another engine, had someone forged that engine for him, it's done the same again, the guy that built it is denying any responsibility, so he's having it rebuilt again by someone esle.

So far its cost over £9k

 

don’t rs tuning do this stuff as well forged engines and all that but are they more expensive don’t they get it up to 500bhp laughing laughing........ [emoji16]


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I'll use my own foolishness as an example:

Bought the car as a joke last May, just a bit of fun, paid £1k roughly.
Spent another £1k getting it ready for the track (tyres, brakes and cambelt).
Fast forward to today....
Probably spent around £7k in total now (inc purchase).

Yeah, its easy to get carried away LOL!

 

That's as long as the engine you get has a good crank, the block and the head are usable

 

Personally i would not spend another penny there, i had him map my forged 225 to 320hp i ended going to EFI and they run it up and it was only reading 260hp, Chris mapped it to 320hp and the difference was night and day.

 

Great write up jukidam!

 

iv heard great reviews about rs tuning mapping i thought they were the ones to go to [emoji2369]


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just found some photos on facebook some one forging there 250 going for 500bhp




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Just have a read of Big Uno's engine build about this turbo kit, that why i went for the Borg Warner one instead

 

https://rsmegane.com/threads/big-unos-r26-project-engine-build.15621/

 

ye i will ian thanks mate


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