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Old 08-12-2011, 12:16 PM   #1
scikoticWagon
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Default grimmspeed up-pipe problem!!

So yesterday I had installed my new Grimmspeed up-pipe. I bought both new gaskets that came from rallysportdirect.com and they are thicker than the oem ones but abit. But anyways my problem is I hear a hissing fluttering noise under pressure and think its loosing boost pressure. There is a small gap where the uppipe meets the manifold, but its a small gap so it could be the gasket making the fluttering noise when under pressure. Does anyone else have this problem? cause there shouldnt be any extra noise when installing a catless uppipe correct?
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Old 08-12-2011, 12:23 PM   #2
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you seem to have borked the install or something

there should be NO gaps anywhere
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Old 08-12-2011, 12:34 PM   #3
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It may be the flex joint, mine made a funny sound at first under load, but then went away after 20min or so and never returned.
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Old 08-12-2011, 01:08 PM   #4
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i dont think its the flex point cause its been more than 20 mins, prolly 4 hrs now all together on it so far, but im going to unbolt it all and rebolt the bottom piece of the uppipe first to get a good connection there then tighten the top piece up last this time, since i tightened the top first and the bottom last.
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Old 08-12-2011, 01:44 PM   #5
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Give it another shot at tightening it. I think a good sequence to tighten is uppipe to manifold first, then uppipe to turbo, then manifold to head. I've been doing it that way for years and no leaks.... as far as I can tell, ha!
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Old 08-12-2011, 01:47 PM   #6
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Quote:
Originally Posted by scikoticWagon View Post
i dont think its the flex point cause its been more than 20 mins, prolly 4 hrs now all together on it so far, but im going to unbolt it all and rebolt the bottom piece of the uppipe first to get a good connection there then tighten the top piece up last this time, since i tightened the top first and the bottom last.
Did you read/follow the install instructions provided by Grimmspeed?
https://www.grimmspeed.com/install_g...ne_version.pdf

Quote:
Originally Posted by Grimmspeed
28. Loosely install passenger side exhaust manifold collector to engine head. Remember to replace gasket.
29. Loosely install (2) 14mm bolts from up pipe to passenger side exhaust manifold collector. Remember to replace gasket.
Grimmspeed 3
30. Loosely install (2) 14mm bolts from crosspipe to passenger side exhaust manifold collector. Remember to replace gasket.
31. First torque back-most 14mm nut on passenger side exhaust manifold collector to engine head. Followed by remaining (2) 14mm nuts that hold passenger side exhaust manifold collector to engine head.
32. Torque (2) 14mm nuts/bolts from passenger side exhaust manifold collector to up pipe.
33. Torque (2) 14mm nuts/bolts from passenger side exhaust manifold collector to crosspipe.
34. Torque (5) 14mm nuts from up pipe to turbo.
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Old 08-12-2011, 02:37 PM   #7
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Quote:
Originally Posted by WhyHelloOfficer View Post
Did you read/follow the install instructions provided by Grimmspeed?
https://www.grimmspeed.com/install_g...ne_version.pdf
directions????

wtfizat????

dont need no stinkin directions
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Old 08-14-2011, 12:09 PM   #8
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So i did exactly what the directions said and with the aftermarket gasket it still wouldnt seal so we put the oem gasket back on and it sealed right up! but one problem is its still making that sound!! and i know there is not gap or leak! could it just be the uppipe breaking in or is it the sound of the turbo perhaps?? also it took 2 days for my check engine light to come on as well.
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Old 08-14-2011, 01:08 PM   #9
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Old 08-15-2011, 09:02 AM   #10
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Quote:
Originally Posted by scikoticWagon View Post
... There is a small gap where the uppipe meets the manifold, but its a small gap so it could be the gasket making the fluttering noise when under pressure. Does anyone else have this problem? cause there shouldnt be any extra noise when installing a catless uppipe correct?
You have a warped uppipe to manifold flange, most likely. Grimmspeed has had a run of warped flanges recently.

Contact Grimmspeed. They will work with you to replace the defective uppipe with a new, good uppipe.

To be certain the flange is warped, remove the pipe and put a straight-edge, (something you KNOW is straight) across the flange. There should be no gaps between the straight edge and the flange.
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Old 08-15-2011, 06:39 PM   #11
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I just installed a grimmspeed up pipe and have absolutely no fluttering sounds. You must tighten the exhaust in the correct order for everything to seal correctly. It sounds like you have an exhaust leak. From what I researched you must torque manifold to crosspipe, manifold to upipe, manifold to block and then uppipe to turbo in that order for every pice to seat correctly. An upipe is not a fun install so I made sure I did it right the first time. After the grimmspeed upipe the only weird sounds I notice is the car occasionally shooting flames between shifts.
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Old 08-16-2011, 04:08 PM   #12
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Its not wastegate flutter that you are hearing?
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Old 08-16-2011, 04:48 PM   #13
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Don't let a gap fool you, the thick gaskets maybe appear to leave a gap but as long as the fire ring is sealed in the middle you're ok. The key is to track down where the noise is coming from. After the car cools down i would get underneath and have someone start it up for you. Quickly feel around for leaks before it gets to hot and see if you can find it.

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Old 08-16-2011, 05:45 PM   #14
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Are there any drivability issues? If not, you may just be hearing normal wastegate flutter
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Old 08-16-2011, 05:56 PM   #15
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Thanks guys, Im not sure if its wastegate flutter or not but it only happens when you get on it, so when its going under load does it make this sound. The thing is the bigger gasket I had ordered the middle ring wasnt even crushed down so it wasnt making a seal so I reused the old one instead. Its when you get on it and its just a weird sound. Idk if its because of the flexpipe making this sound? is there a break in sound perhaps? i know there shouldnt be a leak cause it should be way louder than it is and plus i put my hand around the top of the uppipe where it connects to the turbo and i was pulling on the throttle cable and I felt no leak up there. I am confused as to what I should and shouldnt be hearing. I highly dont think its wastegate flutter since that happens after the load but this noise is while its under load that I can hear it and this happened after I installed the grimmspeed uppipe. So what should I do?
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Old 08-16-2011, 05:58 PM   #16
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ask a knowledgeable local for help
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Old 08-16-2011, 05:59 PM   #17
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do you think the flexpipe might have a hole in it so thats the noise I am hearing??
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Old 08-16-2011, 06:00 PM   #18
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I tried but noone said anything and the closest I am prolly to is over 1:40 mins away
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Old 08-16-2011, 06:11 PM   #19
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the other thing is that it feels like its boosting fine! i did a quarter mile test in my town and from start to finish i made it in 100mph so im assuming thats good and from 1st to 2nd gear it wants to break rubber so im assuming its working fine. Its just that weird sound. Idk if maybe its just the pipe breaking in or whats going on. Is there any at home tests I can do on it to check some things?
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Old 08-16-2011, 09:38 PM   #20
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Quote:
Originally Posted by scikoticWagon View Post
the other thing is that it feels like its boosting fine! i did a quarter mile test in my town and from start to finish i made it in 100mph so im assuming thats good and from 1st to 2nd gear it wants to break rubber so im assuming its working fine. Its just that weird sound. Idk if maybe its just the pipe breaking in or whats going on. Is there any at home tests I can do on it to check some things?
My philosophy is why fix something that isn't broke?
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Old 08-16-2011, 10:25 PM   #21
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cause it makes a sound that i do believe doesnt belong lol....anyways does anybody know any tests i could do besides get under it and have a friend start it up and rev it up to see if i can feel any leaks?
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Old 08-17-2011, 11:04 AM   #22
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We've never heard of sounds associated with this pipe unless there was a leak involved. Can you post a video of the sound? You're hearing the noise with both the old gasket and the new correct? Just because the fire ring wasn't "crushed" doesn't mean it wasn't sealing. It would take a heck of a lot of force to make our gaskets appear crushed. If boost it still responsive then it really doesn't sound like a leak. Spend some time around the pipe and anything else you may have messed with during the install, maybe something else is loose or rubbing. The key is to pinpoint where the actual noise is coming from.

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Old 08-17-2011, 12:41 PM   #23
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im going to get underneath the car today and see if i can hear anything, the only problem is you cant hear it unless the car is moving under load which blows! so im going to try my best cause maybe its rubbing against something. But yea thats the weird thing is that its still boosting good which also confuses me, ill try and get a sound video of it today as well. Well ill try out a couple of things and let you guys know from there
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Old 08-17-2011, 12:47 PM   #24
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Maybe the "noise" you are hearing is simply the change in tone between the old uppipe and the new Grimmspeed pipe?

While you are posting a video of the sound you are hearing, also paot a picture of the gap you have been referring to.
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Old 08-17-2011, 01:12 PM   #25
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the gap that was there is not there anymore, its closed up and if there is any gap its like a tenth of a millimeter then lol
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