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Old 19th April 2017, 14:58   #1
Richard Batty
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Default 1.8 induction noise

Hello fellow enthusiats

I purchased my 1.8 Connie a year ago with 35k on the clock, it now has 46K. Ever since I have had it I have been aware of induction noise which my mechanic says is just how the car is. I have changed many things including head and associated gaskets and a new exhaust system. Nothing has changed over the year despite full services, inc air filter and the aforementioned head gasket. Also Shannon tube changed and new air box fitted. Sounds like I have a performance air filter fitted.

Is this induction noise (similar to exhaust noise but that is eliminated) on acceleration normal, am I over reactiing or is there a fix for it.
Any help appreciated.

Thank you
Richard Batty

Last edited by Richard Batty; 3rd March 2018 at 16:08.. Reason: updated progress
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Old 19th April 2017, 15:16   #2
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Check the shannon tube, chances are it has disintegrated
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Old 19th April 2017, 16:48   #3
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Thank you Suzublu, Sorry but I have no idea what or where that is.
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Old 19th April 2017, 16:52   #4
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Ah I have googled it and now see where and what it is. This would increase induction noise I assume?
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Old 19th April 2017, 17:01   #5
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The original 'Shannon' branded induction pipes reduced air noise due to their construction and design. Their current ducts are a bit diffrent from what we had: http://www.shannon.co.uk/Auto/automotive.html

Nowadays, most people fitting a replacement use a neoprene type ducting from eBay.

This HowTo will explain: http://www.the75andztclub.co.uk/foru...ad.php?t=36976

TC
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Old 12th May 2017, 13:27   #6
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New tube fitted by my usual garage. Half hour! Quieter now. Thank you all
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Old 6th July 2017, 12:38   #7
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In reality it still isn't much quieter. Could the Cat need changing perhaps? the exhaust from the Cat back is all new and not leaking. It has a low down noise on acceleration. Any suggestions welcome
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Old 6th July 2017, 13:53   #8
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Should be virtually no induction noise from a 1.8 with standard set up.
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Old 6th July 2017, 18:38   #9
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Have you checked the state of the air filter?

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Old 17th July 2017, 18:26   #10
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Changed about 7k miles ago. still good.
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