Terrible response with BNR S3!

[EmPeEs6]

Hi together,

I just installed a BNR Stage 3 on my Mazdaspeed6.
It has a very good high end performance but takes an extremely long time to spool up -
it seems that this thing wakes up around 3k and real high boost pressure is reached far beyond 3500 rpm.
I'm hitting my boost targets of ~20.3 psi from 4 - 6k with WGDC values of max. 63, so in principal the turbocharger is working as expected, but what could be the reason for the very late spooling? My WOT-load values are very low as well (<1.9 at 3.5k/intake air temps of ~100°F).
Just for your information: I still have the stock intake system (except for the tip) and no fmic!

Best regards from Germany!

[Raider]

You will be asked for datalogs to get help, as well as a full mods list.

[atvfreek]

Going wot at 2500 you should have 20+psi at 3200-3400 rpms. You may need to make load table adjustments, wgdc adjustments, or wastagete/load dynamics adjustments. As raider said, post some logs and we can check it out.

[TiGraySpeed6]

Good question
with technical answers that appear beyond your skill level
I know we just met, and this is crazy
but donate maybe

[rfinkle2]

In addition to the above, are you running a 3 port boost control solenoid?

[ckMS3]

You still haz stock intake? Upgrade that shit! Also post some logs

[rfinkle2]

Originally Posted by Raider You will be asked for datalogs to get help, as well as a full mods list.

Originally Posted by atvfreek Going wot at 2500 you should have 20+psi at 3200-3400 rpms. You may need to make load table adjustments, wgdc adjustments, or wastagete/load dynamics adjustments. As raider said, post some logs and we can check it out.

Originally Posted by ckMS3 You still haz stock intake? Upgrade that shit! Also post some logs

+4 we need

[EmPeEs6]

Yes, I forgot to mention that I'm running a Grimmspeed in 3 port mode.
The wgdc start values are high enough - my boost dynamics maps are stock, and since I'm boost tuning, I (almost) don't care about the load maps ;-)

Other mods: SU tmic, water inj., racepipe, cb, tip, k&n air filter, hpfp-upgrade, forge bov, itv22 plugs.
Concerning intake mods: I'm going to install a Corksport sri + cold air box although this won't be much beneficial in conjunction with the current hot summer temps.
I will post some data logs this evening.

[p057]

too much restriction on the intake and you need a tune, bad.

my 3071 hated having such a small intake (cobb intake + PG TIP) I can't imagine how the heck you're running on stock intake. Just too slow to spool.

[TiGraySpeed6]

again, suggest:

-post map
-post maf cal and WOT logs
-compile list of related mods into single post so folks do not need to search your stuff
-donate, as detailed answer is obviously worth more than your time to search, learn & extrapolate from existing information.

Heck, you've already been told where to begin looking.

and no, I won't pester over & over. I just think it's a cheap price for what folks charge quite a bit to do professionally that is being asked for for free.

[Lex]

A larger intake and exhaust will certainly help. The BNR is a fast spooling turbo, your WGDC should be 100% up to 3000 RPM.

Without more information it's hard to tell if this is a hardware issue or a tuning issue.

[BigjohnB20]

Seems fairly straight forward to me...

Stock intake, stock primarly cat, no real tune. What did you expect. Open up the breathing a little for that turbo and get a real tune and you will be quite pleased I imagine.

[Speeden6]

OP, your BNR S3 just doesnt seem to work for you, ill gladly take it off your hands at a discount cause its used of course, but ill give it a proper home!

[Oliverms3]

NO DP.... bottle necking that bitch

[EmPeEs6]

Thank's Lex - this was exactly the problem!
Since I used to run a wgdc start value of 35 at 3k rpm resulting in 20.3 psi with my upgraded k04,
I thought that the BNR would spool up early enough to produce at least 17.4 psi at this revs and wgdc.
I increased the value to 55 (and also the one for 2500 slightly) and now the car runs much better!

Concerning the "very helpful" comments like "you need a proper tune...": I'm just beginning to tune the BNR and there are almost no experiences
with this turbocharger in Germany, so this process will take some time!

[duappleganger]

WAS SPIELST DU AN DAS FAHRZEUG TUNE? WIR BRAUCHEN DATEN UM IHNEN!

[meicalnissyen]

Originally Posted by duappleganger WAS SPIELST DU AN DAS FAHRZEUG TUNE? WIR BRAUCHEN DATEN UM IHNEN!

Genaurechts

[himurax13]

Originally Posted by Oliverms3 NO DP.... bottle necking that bitch

Mine spools up just fine.

OP you don't want full boost until about 3500 rpm's, it will help save your engine.