Turbo flutter or surge - Cobalt SS Network



2.0L LNF Performance Tech 260hp and 260 lb-ft of torque Turbocharged tuner version.
Technical Discussions ONLY!

Reply
 
 
 
Thread Tools Search this Thread
Old 07-04-2018, 08:33 PM   #1  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Turbo flutter or surge

I have a cobalt lnf full bolts on with k04r hpt tune 25psi.... and i have a flutter sound in aceleration on low rpm... i have the stock bvp.... what you think the problem is ?
Jerome Bernier is offline   Reply With Quote
Old 07-04-2018, 10:01 PM   #2  
Senior Member
iTrader: (3)
 
Join Date: 06-12-12
Location: Indiana
Posts: 4,576
Thanked 219 Times in 206 Posts
It's probably normal on light throttle, especially when the motor isn't warmed up.
63 Nova SS is offline   Reply With Quote
Old 07-04-2018, 10:33 PM   #3  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Ok... i tey it only when my engine is warmed up... but its only appen in 3 4 5gear when the turbo is not in full boost... when im full boost all is correct
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 10:44 AM   #4  
New Member
 
Join Date: 01-28-18
Location: Ottawa ontario
Posts: 71
Thanks: 0
Thanked 1 Time in 1 Post
Ok either the line to the bpv is leaking or the spring in the bpv is to stiff
Cobalt4209 is offline   Reply With Quote
Old 07-25-2018, 11:30 AM   #5  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Ok im stock bvp...
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 11:45 AM   #6  
2008 SS/TC
iTrader: (4)
 
Join Date: 01-21-11
Location: Lochbuie, Colorado
Posts: 12,623
Thanked 142 Times in 110 Posts
all cars turbo flutter. no BOV or BPV is fast enough to dump at low throttle. its normal
leemanfor is offline   Reply With Quote
Old 07-25-2018, 11:52 AM   #7  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Yes i know.... but mine does this song a full trottle but low rpm... i sont know if its because i have too flow for the engine at low rpm or i have a problem with my bvp... but that song dosent affect the power of the car
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 12:22 PM   #8  
Premium Member
iTrader: (6)
 
Join Date: 07-19-10
Location: Denver, Colorado
Posts: 21,613
Thanked 347 Times in 305 Posts
Quote:
Originally Posted by Jerome Bernier View Post
Yes i know.... but mine does this song a full trottle but low rpm... i sont know if its because i have too flow for the engine at low rpm or i have a problem with my bvp... but that song dosent affect the power of the car
What gear are you going full throttle at low rpm?
ECaulk is offline   Reply With Quote
Old 07-25-2018, 12:30 PM   #9  
Senior Member
iTrader: (3)
 
Join Date: 12-07-09
Location: The Desert
Posts: 1,303
Thanked 60 Times in 48 Posts
My K04R made some strange noises as well in the lower RPMs. Others have reported it too.

​​​​​​
T-Man is offline   Reply With Quote
Old 07-25-2018, 04:34 PM   #10  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Third gear if you do a pull at 2500rpm it will do a strange noise similar to surge but it dosent affect the performance of the car. Im tuned at 26psi... i dont know if i have to buy a forge bvp and put the harder spring too... it is possible that the stock bvp leak at 26psi on k04r ?
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 04:56 PM   #11  
Premium Member
iTrader: (6)
 
Join Date: 07-19-10
Location: Denver, Colorado
Posts: 21,613
Thanked 347 Times in 305 Posts
If you want to keep your transmission in one piece stop going WOT below 3500rpm in any gear but 1st and maybe 2nd.
ECaulk is offline   Reply With Quote
Old 07-25-2018, 05:36 PM   #12  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Sure... i just want to know if i can resolve this problem... because its very easy to do some extra damage for my new turbo .... just to put the gaz pedal to 50% in thirs at low rpm and the tuebo do the same thing
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 06:06 PM   #13  
2008 SS/TC
iTrader: (4)
 
Join Date: 01-21-11
Location: Lochbuie, Colorado
Posts: 12,623
Thanked 142 Times in 110 Posts
low speed flutter isn't going to hurt your turbo. its perfectly normal
leemanfor is offline   Reply With Quote
Old 07-25-2018, 06:19 PM   #14  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Okk thanks a lotsss
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 06:40 PM   #15  
Premium Member
iTrader: (6)
 
Join Date: 07-19-10
Location: Denver, Colorado
Posts: 21,613
Thanked 347 Times in 305 Posts
Quote:
Originally Posted by Jerome Bernier View Post
Sure... i just want to know if i can resolve this problem... because its very easy to do some extra damage for my new turbo .... just to put the gaz pedal to 50% in thirs at low rpm and the tuebo do the same thing
Adjust the tune, thats how you resolve the problem likely. It's hard to say from a keyboard no where near the car or a log of the car running. If the sound happens when you give it 50% thottle at 2500rpm it's likely because the tune is calling for all the torque at part pedal to make it feel faster. I'm also assuming that at half throttle you can't keep it below 20psi and the throttle feels like an on off switch.
ECaulk is offline   Reply With Quote
Old 07-25-2018, 07:25 PM   #16  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 07:30 PM   #17  
Senior Member
iTrader: (3)
 
Join Date: 06-12-12
Location: Indiana
Posts: 4,576
Thanked 219 Times in 206 Posts
Yeah that's not quite normal. It sounds like you aren't opening the bpv valve well. Are you sure you map sensors are ok, no leaks in the system, and does it open ok at wot? Flutter is ok, but that's a little much for no bigger than a r is.
63 Nova SS is offline   Reply With Quote
Old 07-25-2018, 07:32 PM   #18  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
I have gmpp 3bar map and yes they are ok... at wot all is normal no weird sound and the power are there.... its only at little boost at low rpm
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 07:40 PM   #19  
Premium Member
iTrader: (6)
 
Join Date: 07-19-10
Location: Denver, Colorado
Posts: 21,613
Thanked 347 Times in 305 Posts
That's surge, the turbo is pushing more air than the head can handle, get your tune fixed.
ECaulk is offline   Reply With Quote
Old 07-25-2018, 08:11 PM   #20  
New Member
Thread Starter
 
Join Date: 07-04-18
Location: Canada
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
If i pay attention to dont puah the tuebo at low rpm its correct for the turbo ? Because it doesent surge at all at wot ?
Jerome Bernier is offline   Reply With Quote
Old 07-25-2018, 09:21 PM   #21  
New Member
 
Join Date: 01-28-18
Location: Ottawa ontario
Posts: 71
Thanks: 0
Thanked 1 Time in 1 Post
check you maps clean them if there signal is off it will cause flutter
Cobalt4209 is offline   Reply With Quote
Old 07-25-2018, 10:25 PM   #22  
Moderator
Platinum Member
Moderator
iTrader: (3)
 
Join Date: 04-18-14
Location: El Paso, TX
Posts: 14,025
Thanked 409 Times in 384 Posts
Post a video of the sound. When I had the k04r it would flutter at low rpms all the time.
Snail_SS is offline   Reply With Quote
Old 07-26-2018, 05:46 AM   #23  
Senior Member
iTrader: (3)
 
Join Date: 06-12-12
Location: Indiana
Posts: 4,576
Thanked 219 Times in 206 Posts
Quote:
Originally Posted by Snail_SS
Post a video of the sound. When I had the k04r it would flutter at low rpms all the time.
He did, sounds like it's surging to me. Light flutter, and then surge. Only time mine has done this is when I split the oring on the lower map sensor.
63 Nova SS is offline   Reply With Quote
Old 07-26-2018, 08:41 AM   #24  
Moderator
Platinum Member
Moderator
iTrader: (3)
 
Join Date: 04-18-14
Location: El Paso, TX
Posts: 14,025
Thanked 409 Times in 384 Posts
Now I see the video my bad, sounds like my ko4r did when I had it it was super annoying reason why I have a zfr now
Snail_SS is offline   Reply With Quote
Old 07-26-2018, 10:06 AM   #25  
Member
iTrader: (1)
 
Join Date: 12-02-11
Location: Ontario
Posts: 200
Thanks: 0
Thanked 1 Time in 1 Post
Definitely surging, "Safe" flutter should only happen when letting off the throttle, not getting into it. I would validate the tune isn't causing problems and a boost leak test wouldn't hurt!
Stealth-TC is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Turbo Surge, Turbo Flutter Vacuum Help wordsandsuits 08-10 SS Turbocharged General Discussion 24 05-10-2015 12:04 AM
Compressor Surge/Flutter (standalone engine) maccos Problems/Service/Maintenance 10 06-24-2014 02:59 PM
hks surge or flutter? roadrunner132 08-10 SS Turbocharged General Discussion 2 08-09-2012 01:58 PM
Turbo flutter/surge? TX.SS.TC 2.0L LNF Performance Tech 21 04-15-2012 11:45 PM
Turbo Flutter Upon Cold Start Up hydroturboss 08-10 SS Turbocharged General Discussion 25 03-03-2011 03:36 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:11 PM.


© 2018 MH Sub I, LLC dba Internet Brands
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.