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Invidia Gemini - Noise on downshifts

So yesterday I made the switch to an Invidia Gemini CBE. If I downshift and don't match the revs exactly (NO SRM), I get a brief but loud sound, could

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Old 05-17-2011, 09:26 AM   #1 (permalink)
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Default Invidia Gemini - Noise on downshifts

So yesterday I made the switch to an Invidia Gemini CBE. If I downshift and don't match the revs exactly (NO SRM), I get a brief but loud sound, could be a rattle but almost sounds like grinding.

If I match the revs, I get nothing and its smooth.

Anybody else have this issue with the Invidia and know whats causing it?
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Old 05-17-2011, 09:29 AM   #2 (permalink)
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maybe the exhaust is shaking a little as you downshift, thus you are hitting the crossmember as the exhaust vibrates/moves....


just an idea.
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Old 05-17-2011, 12:08 PM   #3 (permalink)
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Quote:
Originally Posted by seande View Post
So yesterday I made the switch to an Invidia Gemini CBE. If I downshift and don't match the revs exactly (NO SRM), I get a brief but loud sound, could be a rattle but almost sounds like grinding.

If I match the revs, I get nothing and its smooth.

Anybody else have this issue with the Invidia and know whats causing it?
I seem to be having the same issue with my Greddy SE exhaust. Your description is spot on to what I am experiencing...a rattle/grind noise that is brief but very noticable on downshifts and low throttle.

I think Econ may be right...makes sense. I just got it installed last Friday so I am hoping that the system just needs some time to settle completely. Just going to continue to monitor over the next couple weeks and see how it goes...
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Old 05-17-2011, 12:36 PM   #4 (permalink)
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go under the car and look how much room u guys have between the midpipes/y/x pipe and the cross member.

should have at least a 1/2" - 3/4"
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Old 05-17-2011, 07:55 PM   #5 (permalink)
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I had a rattling vibrating noise too on downshifts. Took it to amplified and they fixed it. Make sure there is clearance with the pipes.
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Old 05-18-2011, 09:42 AM   #6 (permalink)
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Quote:
Originally Posted by Econ View Post
go under the car and look how much room u guys have between the midpipes/y/x pipe and the cross member.

should have at least a 1/2" - 3/4"
Econ was right. The clearance was just a little too tight. All fixed now.

Thanks!
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Old 05-18-2011, 11:12 AM   #7 (permalink)
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Quote:
Originally Posted by seande View Post
Econ was right. The clearance was just a little too tight. All fixed now.

Thanks!
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