Hi Guys, my name is Wilson, I'm from Brazil and first of all I would apologise for my bad english. As we don't have good foruns about mini cooper here, I realy need your help.

I have a stage 2+ Manic remap installed in my car. The hardware upgrades are:

- GFB DV+
- Big Interccooler
- K&n intake filter
- Downpipe without cat
- Resonator Delete

Before remap I got 154whp at my car, after remap I got 206whp.

I'm really happy with my car, but I'm having a big issue.

Using de Manic MAP C, usually at the 4th gear, around 4000-5000rpm, I can hear a air sound going out, it might be from de GFB DV+. The sound is not constant like TISHHHHHHHHHHHHHHHHHH, but goes and stop many times, like TISHH TISHH TISHH TISHHH (I know is dificult to explain).

I did a test and this sound just appear when my boost gets 1.6bar (around 22-24 PSI) pressure.

Using the MAP B, the pressure don't go over 21 PSI, so this problem don't appear.

Does anyone had this problem before? I really don't know what to do. I think it could be my GFB DV+ and might be better to change for a ALTA Diverter, but don't want to spend a lot of money and don't solve my problem.

Thanks a lot guys!!

 

Either the diverter valve is faulty or the cars computer is signalling it to open.

 

I'm looking to change mine. I guess Alta is better than Forge, right?

But if the problem is the car computer, how could I fix it?

 

No idea, but your English is as good if not better than many native speakers. Hope you get it working!

 

To change my GFB DV+ To Alta one, I'll need to buy only the compressor recirculation or the boost port too?

 

I had the GFB and was having issues , I changed back to OEM and never had an issue again
Good luck

 

If the DV is causing issues, go straight to Forge. Do not mess around with Alta at all. I don't know what Dirty is running for tune/boost level, but I wouldn't trust a factory BPV to handle 1.6 bar of boost. Alternatively, make sure you let whoever your Manic dealer/tuner is in case they can see something you might not. Depending on symptoms, and assuming you're still on factory turbo, the wastegate could be on its way out as well.

 

Dirty has been running 23+ psi (1.6bar)manic stage 2+ for awhile. note: yes the 23 psi falls off after 4K or so due to the stock turbo running out of air/breathe. OEM has been flawless but who is to say it will not turd out tomorrow, just stating what I have been doing.
I have had the new turbo on it for about 3 weeks now and HOLDING 23+ to redline now and still no issues with OEM.
I changed the GFB out to a dealer new 2015 OEM as a test,( my car is an 07 with 50k miles) my issues went away. I didn't change back to the GFB to see if the issues came back. I didn't change back due to the fact the OEM was working and I heard you had to "oil" the GFB DV every now and then......
Just stating my experience and what has happened

 

That is the exact issue I have, but I'm very afraid to keep the OEM with 24 PSI. Probably it will burst.
Thinking to buy de ALTA ou FORGE one.

 

I will try and find out today what Owens is using , I think its the Volvo OEM but can't say for sure.

 

OH wait , your saying your issue is you are losing boost in the upper rpm range ??
Its not the DV if that is your issue, its the turbo is running out of air, to small of a turbo.
Can you log your MAF ? if so you will see around 4k the MAF maxing out around 22 lb/m and your boost drop cause you can push that much pressure any more.
I will put up a few log files this evening and show you what I'm trying to say....lol

 

I did one log file as below, my car now is at remap "b" (intermediate) and I had the problem at 22.9 PSI.

Remap "a" goes around 21psi
Remap "c" goes up 24psi

The insue appear only around 4.000 - 5.000 rpm

I didn't understand your answer ridinDirty, is there anything I can do to solve it? So the problem is not at de GFB DV+?

 

reading your first post , is it still going tisssh,tisssh,tisssh ??

I thought you where just noticing boost dropping after 4k and was thinking it was the DV's fault. I was trying to explain that the stock turbo isn't going to carry full boost to redline. Its just to small.

If its going tisssh,tisssh,tisssh I don't really know what to say , I did a test to prove my wastegate was still working correctly by pulling my vacuum line off the DV and hooking it directly to my actuator port. Then I drove it cautiously and around 2.5K it would tisssh,tisssh,tisssh .... but yours is doing that at 4.5k ?

you sure your vacuum lines are correct and in good shape ? Are you using stock vacuum lines ?

 

Yes, my isue is aways at 4.000rpm.

I read an article that mini cooper S map sensor is 2,5bar.

atmospheric = 1bar
22psi = 1,5bar

So when my car goes over 1,5bar turbo pressure (2,5bar if consider the atmospheric pressure) than MAP sensor start working, cutting the pressure until it goes to 1,3bar turbo pressure.

Does anyone have heard it before?

 

Can you provide a graph of the boost pressure and RPM? It's really hard to see what is going on with just a snap shot.

I was under the belief that the Manic tune disables the boost cut so I don't think that the ECU is cutting boost. I think the JCW has a 3.5 bar sensor but you just can't swap them out without modifying the ECU.

Now, the tune might be controlling boost to meet its specific power targets based on the load but it would be done via the waste gate and you shouldn't really hear that.

So You could have:

1.) faulty DV valve, it's an easy swap to the OEM and it's not terribly expensive.

2.) a boost leak somewhere that only manifests when you go above certain pressure. This would be much harder to find.

 

if your car is doing the tisssh tisssh tisssh i think its over boosting cause that is the noise mine makes when i pin the wastegate....

if your just losing boost in the upper rpm's its just a normal thing due to the turbo being to small

below is a graph of my stock turbo on manic stage2+
2850rpm 20.94psi 14.3lbs/min MAF (mass air flow)
4702rpm 18.40psi 19.5lbs/min MAF
5468rpm 17.20psi 21.0lbs/min MAF




below is a graph of my new Owens turbo with the SAME manic stage2+
3173rpm 23.30psi 17.5lbs/min MAF
4290rpm 22.30psi 21.0lbs/min MAF
5242rpm 21.09psi 24.7lbs/min MAF




You can see how my car NOW holds boost to redline , I have graphs where I pushed it to 6600 rpms and its still climbing

You need to log you MAF (mass air flow ) vs boost pressure vs rpm.
Your numbers are prob higher due to our ( USA ) low octane gas but you might see when your boost drops so does your MAF and that is just due to the max you turbo can put out.......

just my thoughts.....

 

Did you fix your car ?

 

Not yet, AEM intake ****ed my Car.

 

Wow that sucks. Hope you get it up and running again!

ra2fanatic had the exact same thing happen.
That heat shield design is garbage

 

This week my car is at the mechanical workshop fixing that issue. I sent some e-mails today for AEM, hope than can help me to solve my problem.
There isn`t many MCS in my cowntry, but there is many Citroen DS3 with the same n14 engine, so I problably gona change my valves cover com a citroen one.

 

Ouch , Sorry to hear.

I did some testing with under the hood temps before I put my new turbo on . I ended up wrapping my exhaust manifold and turbo plus putting the Way Motor blanket on the turbo. Under hood temps dropped around 20 degrees.

I think the shield in any situation just deflects the heat to the valve cover , not good as you found out.

This is what I did....

 

I put the factory heat shield on top and that is it. My down pipe will not allow any more of the factory heat shields to be installed.

 

Unless I missed something in this thread, the car is hitting boost cut. The stock internals can't handle much more than 20-22 psi and I believe 24 is the boost cut. As far as I know from my personal experience. You can't go above 22-23 on the engine without a boost cut defender to trick the car into thinking its still in the green zone. My n18 r56 runs a 20 psi tube whichbi had a problem with over boosting to 24 then the car would open the watsegatw to relieve the pressure. Not sure lf its the same on jcws but if you have a Cooper S. And you're getting a tsh tsh tsh at 4k you're boost is too high and the car is saving itself. I have a boost valve as a way of controlling the boost spikes so I never hit 24. But imp pretty sure you're running too much boost.

Edit: I also wanted to say I've been running this tune for over 10k miles on the alta spring in the stock diverter holds no issue

 

I heard the same sound a few times in map C myself (stage 1 map c should be 22ish psi)
Have the same mods on my n14: gfb+, wagner ic, resonator delete, noise maker delete, jcw airbox and intake tube and stock downpipe now (removed the catless dp cause it was too loud for me).

Looks to me like compressor stall. Tought that the stock S turbo is almost maxed out at 23 psi, so it really can be compressor stall...

 

Hi guys, I fixed the the problem with my valve cover. I bought the JCW Map sensor but it does not work at my car, unless Manic make another remap for the new map sensor.

I put my car at a dyno to make a test, this is the results



Manic Stg2+ map C with boost cut after 22psi