Hello, I'm currently looking to upgrade my car powerwise the upcoming summer. I was planning to just do a downpipe, intercooler and tune, but someone offered me a Hybrid turbo at a good price. Is the hybrid turbo worth doing? I've seen torque is similar to a stage 2 car. And how is the reliability with a Hybrid turbo compared to the stock turbo? And is the fuelusage a lot higher or is it more or less comparable? Thanks
I’ve had a hybrid turbo and map from RS Tuning for over 5 years and 50k miles on my R26 (engine is forged as well). Fuel economy is similar to before and it’s been reliable. As long as the turbo is in good condition and map is suitable I see no reason why you would have problems. I’m not sure what the standard injectors are like on the 265 but on R26 you need to change them otherwise they max out and don’t get full benefit from the hybrid.
As above, map needs to be suitable. If the engine is stock then you'd have to limit power, especially torque to give you a level of reliability and longevity. You'd also be better off upgrading the fuelling too with larger injectors def on the r26 and on the 265 IMHO. But depends what you are after.
I'm on a stock engine, I will upgrade to 630cc injectors if I go Hybrid turbo. I'm after +- 350 hp if I go Hybrid turbo. I have a mapper in a hour away from me who is specialised in Renault Sport cars. Max torque on stock engine is around 500 NM isnt it? But is it still relatively reliable on a stock engine? My car has done 135K kms(83K miles). Engine doesn't really use oil(1L per 15000).
I wouldn't run 500nm on a stock engine even with larger injectors. More like 400Nm (equates to about 300 ft lbs).
Yes, got dyno graphs from and it ran same power at Surrey Rolling Road which is very respected. Fuel system is standard apart from injectors, I replaced the fuel pump with new oem for piece of mind. Spec is: - 83mm CP Carillo pistons - Manley rods - ACL big end bearings - Catcams cams - Supertech valves - Supertech double spring kit - 630cc injectors - RS Tuning Megane 250 hybrid turbo - Forge recirc value and actuator - ITG induction kit with larger ITG filter - Forge intercooler - Forge hard pipe kit - Forge coolant hoses - Ktec 3" exhaust - Mapped by RS Tuning 329.9bhp and 360lbft - RS Tuning SMF - R26.r clutch
That's interesting Your running Catcam camshafts and a hybrid turbo and your only 20hp and 20ftlb of torque up on mine, i'm running a 120k mile Std 265 turbo and standard cams. Tried for a long time to find out what the benefits of the Catcam cams are, but no one could give me a real answer yours is the best indication of the value of them
Yes, Paul said that without Catcams it would really restrict the ability to make power. My spec with an upgraded fuel system would make 380bhp and 400lbft.
Personally, I don't think either the hybrid or the cams are worth the money. Mine ran 300bhp/290lb at EFi with the 250 turbo, it was dialed back a little due to standard internals. You're talking £2.5k for a hybrid and the cam for 20 or 30bhp! Ktec have a turbo upgrade for similar cost that should see you close yo 400bhp, all be it with a narrowed power band.
I have just bought another Borg Warner 6758 twin scroll, on full boost by 2300rpm , so pleased with the spread of torque that's why i went for the same one again.
After reading the gains from changing the turbo and the cost, For me, I see the Megane as a chassis focused vehicle. That £2.5k buys a lot of chassis enhancements, and if work can be done yourself a huge amount.
yep, was so nice to drive on the road and even better on track, in the wet i could let the revs drop to 3k and then it was so smooth a power delivery to pull you out of the corner or use a gear higher both worked really well
What sort of boost pressure did you achieve at 2300 rpm and at 6000 rpm? I'm looking at an EFR turbo but it seemed the 6758 was more suited for top end power (ie high rev band), and that if I wanted to get reasonable boost at low rev's I would be close to surge? eg https://www.borgwarner.com/go/2FTJU9 To get a better margin to surge would I not need to drop boost even more? Or are some of my assumed inputs to the Matchbot incorrect? Any help/feedback appreciated. I was thinking for my RS250 to get better low end performance the 6258 would be a better fit (for street/track day car) albeit not so much top end HP/air flow https://www.borgwarner.com/go/1PSTJO
from memory at 2300 i was getting about 22psi on my boost gauge, at 6000 it was showing around 28 psi, but by looking at my graph the gauge reading is off . I was well happy about the way the power came in, the torque and pulling all the way to the red line and beyond. I would not hesitate to buy another one, i was looking at the efr 7163, it's actually physically the same size but more power, for some reason they are difficult to find at a good price here, the one i was going to by they told me that the price had gone up by over £500 from last year. I have now bought a Pulsar PSr5455g 30-660, in twin scroll and internal wastegated, it was only £912 shipped, i will be doing a post when i get to fit it, what it maps too etc etc Hope this helps here is my boost graph https://flic.kr/p/2pczpbd and my power graph, this is on my R26 but it has Clio 182's fitted, this apparently shifts the boost up the revs a bit, about 500 ish rpm. https://flic.kr/p/2pcxs3g
@ Zoto - we are in the very same boat .... I also want low - midrange response and a wider powerband. as you know the EFR 6258-G is very close to the hybrid TD04HL-20T but the EFR is totally in another league ... I think this is the best spooling setup for the F4R if low - midrange response is desired with sacrifice some top end. I just can`t find some setup on Megane on the web to have more feedback.
I don't know if this helps any my 265 on standard manifold, with the adapter plate and fitted with a Borg Warner 6758 t4, twin scroll https://flic.kr/p/2jhCGgb
From what I've been told three of the key factors in getting a reliable hybrid are the centre housing type (H vs HL), and the exhaust wheel used balancing procedure It primarily revolves around heat dissipation and the effectiveness of the heat shield after machining.
To be honest i don't blame you about a hybrid, there are some that are supposed to be good, but they are around the £1600-1800 mark, for that sort of money and maybe plus a bit, you can buy a turbo that's been designed for the job from the start. I think with the Megane's you are not going to get the rated power anyway, my 6758 was rated at 500hp and made 438, but pulled back, my mates 250 is running a G30-660 and makes 500hp (it has all the bits fitted to get the most out of it) so these turbos aren't running at 100%
In the end went for the EFR 6758-G following Ian`s advice , thank you Sir! here are some pictures vs oem for some visual comparison.
