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Author Topic: 90mm or 70mm pipework?  (Read 593 times)

Offline AJG09

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90mm or 70mm pipework?
« on: August 17, 2015, 07:59:39 pm »
Couldn't really find an answer for this anywhere.  :fighting:

Is there any benefit to having 90mm pipework compared to 70mm pipework on an induction kit?

I've seen a thread before saying that if you have 70mm pipework it gives a loud whistle at certain rev ranges whereas the 90mm doesn't?...

What's the general consensus on it?

Offline ROH ECHT

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Re: 90mm or 70mm pipework?
« Reply #1 on: August 17, 2015, 08:37:46 pm »
You should address this with a Tuner if you have one...or the one you are considering. Intake pipe volume can cause problems with peak performance and non-adjustable tunes are affected by diameter. I have a 2.75"/70mm and there is no weird whistling caused by the pipe size. I have read that other sizes varying from the tuners recommended size have caused issues.
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