250 Megane 250 Cup on rollers

Discussion in 'Mechanical - Engine, Gearbox, Exhaust etc' started by K9ANY, Apr 24, 2015.

  1. Had the car 6 weeks, so far running great.

    Wanted to see if it was running near Renault's quoted figures so took it down to Powerstation in Tewkesbury which is only a few miles down the M5 for me.

    Standard car bar performance panel air filter. Car has done 72k miles

    Attached graph, seems to be running just a little over Renault's quoted figures.

    Happy with this for now, do fancy uprating the intercooler and a stage 1 map at some point.

    PowerStation Run.jpg
     
  2. They're pretty much always over. Mine read 265 stock and that was running quite lean at the top end.

    304 after a map but it's the torque you really notice. Definitely recommend it above anything else.
     
  3. Very similar to mine before I mapped it. Mine was 255bhp and 267lb/ft stock. Went up to 368lb/ft after map and that equals monumental pulling power :smile: Definitely agree it's the torque you notice.
     
  4. -Jamie-

    -Jamie- RSM Moderator

    Mine was around that as well, ~260bhp and ~270lbs ft
     
  5. Ovy

    Ovy

    I was only interested in wheel horsepower mine now runs more bhp at the wheels than it had standard at the fly! Currently 262whp. But as said its the torque you notice for sure pulling power lol.
     
  6. When you guys have had your 250s mapped, hasn't it hampered the drivability a bit? I mean these motors are a bit twitchy on overtake or when firing through the gears as standard let alone higher torque thrown in the mix
     
  7. 300+ on a standard car with just a map? I'm hoping to see 300+ when I map mine with AT intercooler and KTR induction kit
     
  8. Genuinely, no. These engines are well capable of 310-320bhp and 370lb/ft. Never had any issues with mine, no torque steer etc. As for the chassis, it easily coped with the extra grunt and corner exits under load were a pure dream.
     
  9. That's good to know, I found my car very darty when pulling across to overtake or on shoddy B roads but with changing to 18" cups it's ok, just thought with a lot of extra grunt it would be a bit much on the typical crappy roads round here.

    Guess what's next on the cards once the warranty is out lol.
     
  10. Another graph attached with more data like boost and intake temperature. Looks like it hit 50 degrees c, the rolling road operator did say that it would benefit from improved cooling.

    PowerStation Run x.jpg
     
  11. -Jamie-

    -Jamie- RSM Moderator

    They are a bit of a handful with the extra power/torque on our Roads up here in particular
     
  12. I echo what Jamie said.. There are some roads i totally avoid and have certain routes i wont budge from to get places up here. Thats even on 18s.

    And if i am surprised with said road conditions there is a queue of raging impatient drivers crawling behind me..:tongueout:
    (cobbled streets with speed bumps are the killer haha)
     
    Last edited: Apr 26, 2015
  13. The front end goes a bit light and the wheels certainly scrabble for grip in 2nd and a lot of third gear.

    I've found myself short shifting it sometimes. Especially out of 2nd, not that I really ever properly floor it in low gears, 2nd gear generally only gets particle throttle as it picks up so fast you're needing to change gear before you know it.

    Some bumpy roads can make the front end weave a but too. I've git used to how it feels.
    Only thing I still struggle with us how wide it feels and the frankly comedic visibility.
     
  14. I'm glad I'm not the only one, I sometimes feel like I'm relying on a sixth sense judging where my four corners are, on occasion I've seen myself look back in my wing mirrors and thought I've been bloody close to a central bollard or apex of a corner.

    Dunno about you lot but it's taken me time to get used to an acquired driving style, I've had my share of performance motors as well
     
  15. I'm not surprised this happens.

    I am actually amazed by the torque the UK tuners put through that motor and clutch assembly. Some reporting here 370lbft (500+Nm for metric guys). Why on earth would one want so much torque down low in an FWD car. I usually see these huge torque peaks as well on most dyno runs; I'm just baffled as to why one would tune it like this. This huge torque disappears rapidly anyways with these small turbo's. Also I'm surprised I am not seeing more clutch failures with these kind of numbers.

    But I guess each on their own. If I'd let my car custom tune, I'd go for a flat, or even an upward torque curve instead of these spikey down-low torque peaks that tend to break everything.
     
  16. Mines is standard, I also when using the Rs monitor put it on the linear throttle map as I find it's a nice progressive torque band, seems to peak just nicely without having to feather the pedal too much.
     
  17. But on an otherwise standard 250, you would have to detune it to actually accomplish that ;-)
     
  18. You'd be a pretty special guy if you could tune it differently, why do you only talk about the guys in the UK? Do you think it's different anywhere else in the world?
     
  19. -Jamie-

    -Jamie- RSM Moderator

    Everywhere else in the world is so far ahead in terms on tuning the MK3 RS is embarrassing frankly. UK cars just tend to have a map and some exhaust work, Thats it.

    Other than my mates forged GTX 400bhp+ one i have not seen many, If any that have went further than the simple stuff. Something i shall be rectifying this year.
     
  20. I read that alot but i really wonder where you lot got that from?

    i only know a few that have a hybrid turbo but tbh i never seen one over 400bhp except in the uk...
     
  21. -Jamie-

    -Jamie- RSM Moderator

    I don't just mean power, Every aspect of tuning them
     

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