>> happened to my stock bov!

 

Hi,

here is the all stroy, i also attached the logs in the document :



I'm in trouble with the grimspeed 3 port.. I set the boost to 25psi.
First I did some run on stock bov and turbosmart bov but on spool up from 2500-3500rpm there was a stupid sound like the bov can not hold boost or compressor surge.. Than I move on ssqv for some run the sound was much quiter but coud hear @ around 3000rpm.
But yesterday I got the synapse dv tried in every mode pull type, push type a+b port but the same sound as with ssqv. Tried to lowering the boost with the wgdc setting to flat 20psi but also can hear it around 3000rpm.
I give it up with the 3 port, instal back the stock boost control system and did some run on Gunso SST settings. No idiot sound on spool up, the car goes smoother even on the stock bov too, where with the 3port was very bad. The boost on spool up with the Gunso settings and with mine on 3 port is near the same..
I have no idea... I'm attacheing a document where I analyzied the logs.

http://www.gigasize.com/get.php?d=jyw1m10bzbc

What coud be the problem with grimspeed 3port ?

The mivec settings the timing and the fuel was the same in every situation.

Here is my wgdc settings :



Mods on the car : 3" exhaust system, ams intercooler pipe and ams intake, dw 1000cc

 

its common with the 3port... i use a gruppe-s 3port and on 3rd gear pulls from 2500-3500 it sounds kinda like compressor surge or the bov is fluttering. i believe it is because you can hear the wga trying to open... especially if you have an aftermarket intake, it will amplify the sound a lot. its not bad its just annoying lol. does it go away when you hit full boost?

 

just to be sure: are your passive wgdc's zero'd out? Your reactive numbers seem pretty high for a 3port, at least according to the stuff I've read. I think at 80% throttle @ 3000 rpm you should be running about 40% wgdc. You're running about 70%

 

Yesss, exactly the same issue ! when i hit full boost the sound goes away ! It is extrem annoying ! Just dont know why does the sound changeing with different bov ?!
and why i cannot hear it with the stock solenoid same level of boost ? Maybe because the boost pills, Y and like this ?

 

Yes passive was zero out and tbec too only the wgdc table effecting on the boost.
I set the crossover point to 110 so 3-4-5-6 gear is working from the high gear range under the test. If you look in the document you can see i need those "high" numbers in the picture to get 25psi near flat boost curve. I tried to lowering wgdc and the boost to flat 20psi and the same problem.

for interest I tried with this settings first time before I raised the numbers what you can see in my last post and I got funny boost curve, here x over point was lower to 75 ( and ofcourse stupid sound was there ) :

 

Did you notice if you're getting the surge in all gears, or just high/just low? The rpm/mph switchover seems pretty high to me... maybe because its an MR, but still seems high.

I see you posted on the 'other' forum, as well. In page 3 of that thread, check out what Whitewind posted. I think that's closer to what you should try in the WGDC tables.

 

yes high /low cross now is high for easier test 3-4-5-6 gear are working now from high gear range.. I would lower it if i can tune up the car without that sound to 75 .

in 3 gear i can hear it but in 4-5-6 can hear little more.

 

im running a stock bov too btw. i have a 9 but the concept is the same. it shouldnt make the sound in 1st or 2nd... only in 3rd+ and only when the turbo is spooling from low rpms... i was trippin out the first few pulls of my tune.

 

AH I have this on my 2010 X with just the Cobb OTS Stage I map, and of course every time I attempt to log, it wont do it, so I've been writing it off as wastegate flutter like what I had on my Subarus.

What I need to do is get a co-pilot to help me do the logging so I can create the situation when it happens.

 

I believe it's normal. I had some fluttering back when I had an open OMG filter. Lol Now I'm running stealth with the stock airbox and no more fluttering.

 

I have the same, when at partial throttle, and over like 3500 RPM. You don't hear it under WOT, i've just sorta got myself into the habit of ignoring it haha.