Super charger flutter

Mrbiker · 10-05-2011, 05:44 PM

After installation had excessive flutter noise seemed to be coming from by pass
Valve. changed vacuum set up and thightend by pass all the way and backed off 1 turn .it does not flutter at idle anymore but can hear it when accelerating and when it shifts it stop for a second and then starts again
Has anyone got ideas what's going on?

Red__Zed · 10-05-2011, 06:01 PM

what kit are you running?

running a bypass valve? which one, and what pressure is it set at?

what pressure are you seeing the flutter at?

Mrbiker · 10-05-2011, 06:31 PM

Quote:

Originally Posted by Red__Zed

what kit are you running?

running a bypass valve? which one, and what pressure is it set at?

what pressure are you seeing the flutter at?

stage 1 and i don't know which bypass it is I got it last month from gtm and as soon as I accelerate it starts to flutter until it shifts and then starts again .
before it would clatter at idle we got that to stop.
I am a little disappointed , it really sound horrible.

Mrbiker · 10-05-2011, 06:37 PM

Quote:

Originally Posted by Red__Zed

what kit are you running?

running a bypass valve? which one, and what pressure is it set at?

what pressure are you seeing the flutter at?

ps the pressure is 8 I belive the flutter stats at 1

prescott3656 · 10-05-2011, 06:43 PM

Mine was doing that, had to lossen it a bit more. I hardly hear it now, ever so slightly sometimes when on cruise control.

Mike@GTM · 10-05-2011, 06:56 PM

You've got the adjustable Turbosmart bypass valve. You need to adjust the knob until there is no flutter.

Also, make sure that you have a clean vacuum source for the bypass valve. If the vacuum source is on the wrong side of the EVAP solenoid (which opens and closes in a pulsating fashion), then you will have problems like you are describing.

weiboy718 · 10-05-2011, 06:59 PM

another thing to add is, if you're running a boost gauge be sure not to use the same evap hose

10-05-2011, 05:44 PM	#1 (permalink)
Mrbiker Base Member Join Date: Jan 2011 Location: Bartlesville ok Posts: 14 Drives: 2010 370z roadster Rep Power: 16	Super charger flutter After installation had excessive flutter noise seemed to be coming from by pass Valve. changed vacuum set up and thightend by pass all the way and backed off 1 turn .it does not flutter at idle anymore but can hear it when accelerating and when it shifts it stop for a second and then starts again Has anyone got ideas what's going on?

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10-05-2011, 06:01 PM	#2 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 121	what kit are you running? running a bypass valve? which one, and what pressure is it set at? what pressure are you seeing the flutter at?

10-05-2011, 06:43 PM	#5 (permalink)
prescott3656 Base Member Join Date: Nov 2010 Location: MD Posts: 66 Drives: 2010 G37s Sedan Rep Power: 16	Mine was doing that, had to lossen it a bit more. I hardly hear it now, ever so slightly sometimes when on cruise control.

10-05-2011, 06:56 PM	#6 (permalink)
Mike@GTM Not an active Vendor. DO NOT BUY Join Date: Sep 2009 Location: California Posts: 391 Drives: '13 Hot Lava FR-S Rep Power: 18	You've got the adjustable Turbosmart bypass valve. You need to adjust the knob until there is no flutter. Also, make sure that you have a clean vacuum source for the bypass valve. If the vacuum source is on the wrong side of the EVAP solenoid (which opens and closes in a pulsating fashion), then you will have problems like you are describing.

10-05-2011, 06:59 PM	#7 (permalink)
weiboy718 Track Member Join Date: May 2010 Location: Bay Area Posts: 923 Drives: Infiniti G37 Rep Power: 17	another thing to add is, if you're running a boost gauge be sure not to use the same evap hose