Jump to content


Photo

My Car


  • Please log in to reply
26 replies to this topic

#1 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 19 June 2024 - 11:26 AM

Finally ready:
390bhp
350lbft torque

Should be exciting
Collecting Monday

#2 KurtVerbose

KurtVerbose

    His Serene Highness

  • PipPipPipPipPipPip
  • 3,771 posts
  • Gender:Male
  • Location:Merlischachen
  • Interests:Big baps.

Posted 19 June 2024 - 11:40 AM

Where's it been?



#3 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 19 June 2024 - 12:54 PM

Where's it been?

On holiday in Norfolk at Courtneys

#4 hairy

hairy

    Moonlander

  • PipPipPipPipPipPip
  • 5,894 posts
  • Gender:Male
  • Location:Bristol
  • Interests:cars, beer, nature

Posted 19 June 2024 - 04:19 PM

Couldn't they squeeze another 10hp out of it? 400 sounds so much better!



#5 KurtVerbose

KurtVerbose

    His Serene Highness

  • PipPipPipPipPipPip
  • 3,771 posts
  • Gender:Male
  • Location:Merlischachen
  • Interests:Big baps.

Posted 19 June 2024 - 04:28 PM

How much did it have before?

 

Be interested to hear how you find it.



#6 Cavturbo

Cavturbo

    Super Member

  • PipPip
  • 372 posts
  • Location:Leamington Spa/Nuneaton

Posted 19 June 2024 - 08:05 PM

That will be fun Ivor enjoy. Would love to hear the full spec.

Edited by Cavturbo, 19 June 2024 - 08:05 PM.


#7 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 20 June 2024 - 04:19 AM

How much did it have before?

Be interested to hear how you find it.

About 260

#8 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 20 June 2024 - 04:20 AM

That will be fun Ivor enjoy. Would love to hear the full spec.

I'll dig it out

#9 Cavturbo

Cavturbo

    Super Member

  • PipPip
  • 372 posts
  • Location:Leamington Spa/Nuneaton

Posted 20 June 2024 - 06:32 AM

Thanks would be an interesting comparison to see how things have moved on since mine was built by them 10 + years ago. Back then Courtenays were recommending Garrett Turbos which mine still has fitted.

#10 oblomov

oblomov

    Scary Internerd

  • PipPipPipPipPipPip
  • 3,805 posts
  • Gender:Male
  • Location:Sitting in front of my computer
  • Interests:None

Posted 21 June 2024 - 01:03 PM

Would it be rude to ask how much?



#11 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 21 June 2024 - 06:11 PM

Would it be rude to ask how much?

Yes more than another car
Not all was to do with the upgrade, new rad fitted,new fuel tank, issues taking the car apart etc

Edited by Ivor, 21 June 2024 - 06:12 PM.


#12 oblomov

oblomov

    Scary Internerd

  • PipPipPipPipPipPip
  • 3,805 posts
  • Gender:Male
  • Location:Sitting in front of my computer
  • Interests:None

Posted 25 June 2024 - 06:06 PM

When Courtenay started doing stage 4 upgrades, there was (as I understand it) an unaddressed problem in that when the throttle was feathered, the turbo would continue to boost causing back pressure on the turbo/flutter.  This was caused by the fact that the throttle is fly by wire as opposed to a mechanical (wire) connection) and the ECU was not able to catch up quickly enough with what was going on with the throttle.  I had to install a top hat with a take off to a Forge bleed valve which in turn has to feed back in to the air intake after the AMM so no air is lost to the system, otherwise again, the ECU would be confused.  On cars like yours, how is the problem addressed these days?



#13 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 26 June 2024 - 04:51 AM

Amazing, that's exactly what it's doing. Do you have any more details on what you did, where you got the top hat from etc

#14 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 26 June 2024 - 05:35 AM

Didn't have the issue with my mmg stage 4 so don't know what's wrong / been changed

#15 stevieturbo

stevieturbo

    Member

  • Pip
  • 45 posts
  • Location:cold and windy place

Posted 26 June 2024 - 05:24 PM

When Courtenay started doing stage 4 upgrades, there was (as I understand it) an unaddressed problem in that when the throttle was feathered, the turbo would continue to boost causing back pressure on the turbo/flutter.  This was caused by the fact that the throttle is fly by wire as opposed to a mechanical (wire) connection) and the ECU was not able to catch up quickly enough with what was going on with the throttle.  I had to install a top hat with a take off to a Forge bleed valve which in turn has to feed back in to the air intake after the AMM so no air is lost to the system, otherwise again, the ECU would be confused.  On cars like yours, how is the problem addressed these days?

 

 

Sounds like a fairly typical problem with a vent to atmos dump valve on a setup with a MAF. You cannot dump already metered air, and expect things to behave normally.

 

That's not a DBW or any throttle problem



#16 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 26 June 2024 - 08:53 PM

Thanks both

#17 joshua

joshua

    Member

  • Pip
  • 179 posts
  • Gender:Male
  • Location:Bath

Posted 27 June 2024 - 11:36 AM

With the stalling issue in mind I spoke with Courtenay last year about the fact my car was mapped 10+ years ago and suggested there might be an improved version by now . Their answer was not really.
Does this problem occur with this stage 4 and a Garret turbo?
My car does not vent a dump valve to air it has a recirculation valve but can flutter away happily and throttle modulation is not great at times.
I always presumed the problem was some kind of pressure feedback loop?

#18 Cavturbo

Cavturbo

    Super Member

  • PipPip
  • 372 posts
  • Location:Leamington Spa/Nuneaton

Posted 27 June 2024 - 01:40 PM

Yes my Garrett VXT does this. I have learnt to drive around it on the road and doesn't do it very often now.

#19 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 27 June 2024 - 03:35 PM

Interesting, thanks all, when I was running it in I said it had this flutter, Courtney said that's what it does, must be a fix you'd have thought

#20 Ivor

Ivor

    Billy No Mates

  • 1,955 posts
  • Gender:Male
  • Location:west Wales
  • Interests:Sheep & Ducatis
    and now bees

Posted 27 June 2024 - 03:35 PM

My stage 4 only did it if there was a vacuum leak




6 user(s) are reading this topic

0 members, 6 guests, 0 anonymous users