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20V vis intake mod #1675461
31/01/2025 15:53
31/01/2025 15:53
Joined: Aug 2024
Posts: 20
Aix-en-Provence,France
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Imeant Offline OP
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Aix-en-Provence,France
Trying to figure out if getting rid of the T joint intake hose is possible if i want to install a custom cold air intake or is it a necessity ?
My intake tube has a big gash and i am not looking forward to spending 200 quid for a replacement, plus if i also get to have induction noises it's only a win win.

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Last edited by PeteP; 03/02/2025 14:31.
Re: 20V vis intake mod [Re: Imeant] #1675462
31/01/2025 15:55
31/01/2025 15:55
Joined: Aug 2024
Posts: 20
Aix-en-Provence,France
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Imeant Offline OP
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Aix-en-Provence,France
is this waffle like structure needed?

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Re: 20V vis intake mod [Re: Imeant] #1675479
02/02/2025 15:16
02/02/2025 15:16
Joined: Feb 2024
Posts: 110
South Kesteven, Lincs
Echodelta Offline
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Hi. The box you’ve marked with a red X is a resonator chamber and it does have an intentional purpose as part of the air intake on a normally aspirated car. The VIS has additional tech in the intake system that yields the approx. 7bhp increase over the regular NA and apparently improves drivability. If you’re not aware, VIS stands for Variable Intake System. I think it changes the length of the intake depending on engine load. If you rip all of that intake pipe work off and stick a custom intake or a cone filter on I expect you may find yourself down on power and disappointed with the result. It’s your car and your choice but if you do decide to remove it I’d definitely keep everything you remove in a safe place so you can reinstate in the future if needed.

Perhaps someone else has done this on a VIS (or NA) and will be able to say for sure. I have an NA myself and am happy with how it is and wouldn’t do it to my car.

Re: 20V vis intake mod [Re: Imeant] #1675491
03/02/2025 10:29
03/02/2025 10:29
Joined: Jan 2020
Posts: 6
Skopje,Macedonia
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PeteP

Last edited by PeteP; 03/02/2025 12:22. Reason: melicious??
Re: 20V vis intake mod [Re: Imeant] #1675493
03/02/2025 11:11
03/02/2025 11:11
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Cleveland
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Re: 20V vis intake mod [Re: Imeant] #1675494
03/02/2025 11:12
03/02/2025 11:12
Joined: Dec 2005
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Aldershot
PeteP Offline
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User is banned. we do not allow such links on this forum.

They are pure filth.

The first link is also flagged up as having malicious content by Norton.

Last edited by PeteP; 03/02/2025 11:16.

16VT and X1/9 1500

We must all do our part for the planet.
I unplugged a row of electric cars that nobody was using.
I even unplugged my own.
Re: 20V vis intake mod [Re: PeteP] #1675504
03/02/2025 20:02
03/02/2025 20:02
Joined: Aug 2024
Posts: 20
Aix-en-Provence,France
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Imeant Offline OP
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what have i missed ?

Re: 20V vis intake mod [Re: Echodelta] #1675505
03/02/2025 20:12
03/02/2025 20:12
Joined: Aug 2024
Posts: 20
Aix-en-Provence,France
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Imeant Offline OP
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Joined: Aug 2024
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Aix-en-Provence,France
Hi thanks for the response,
I know about the Vis system and i'm not considering deleting that , i was simply wondering if the resonator chamber is not essential,
because my intake tube is compromised and cant find oem part, since i was already considering putting on a cold air intake i thought might be better to just delete the resonator chamber,
replace the whole thing with a simpler intake tube, i already have a cone filter, would just need to get the piping and done, hence why i just wanna make sure that i can do that.
thanks.

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Re: 20V vis intake mod [Re: Imeant] #1675509
04/02/2025 09:36
04/02/2025 09:36
Joined: Sep 2006
Posts: 17,237
FCSS 01684 593187
Countrycruising Offline
Club Rep Europe, member 914
Countrycruising  Offline
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The resonator is essential so changing this and adding a direct feed and cone filter the way you're planning will kill low down torque as mentioned above making the cars performance suffer drastically, Fiat designed the intake system to balance the performance of the VIS system so my advice is contact the guys below to see if they have a silicone replacement, if they don't I'm sure they might be able to remanufacture that pipe if you send it to them.

https://motorstore.fr/shop/gb/

Re: 20V vis intake mod [Re: Countrycruising] #1675515
04/02/2025 19:41
04/02/2025 19:41
Joined: Aug 2024
Posts: 20
Aix-en-Provence,France
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Imeant Offline OP
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Aix-en-Provence,France
I'm just curious as to the fact that people point out that resonator as being "part" of the VIS system yet its also shared with the 20v naturally aspirated non VIS, and reading through some paper documents that my dad had related to fiat coupe,
i saw mentioned the fact that their primary purpose was to reduce induction noise, and seeing dyno videos of other cases of use yes torque down low decreases slightly, but not to the point of killing it, but throttle response improves and you get a marginal top end power increase, i don't know how correct all this info is, but if i have to sacrifice a couple NM of torque down low, but gain throttle response, sight bit of horse power, simplicity and induction sound, then to me it would be worth it .
Then again if it truly doesn't "kill" torque but just slightly lose some, it seems that this subject is heavily debated and honestly i can never find proper objective info but just "purist" biased opinions or "15 year old without a car" opinion.
So it's hard to make a constructive decision.

Re: 20V vis intake mod [Re: Imeant] #1675517
04/02/2025 21:59
04/02/2025 21:59
Joined: Mar 2007
Posts: 17,676
Auld Reekie
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Auld Reekie
I speak as one who in no way can assist you with your issue, but also as someone who would urge you to listen very carefully to the advice you've just been given from one of the leading coupe specialists anywhere smile


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Re: 20V vis intake mod [Re: Imeant] #1675518
04/02/2025 22:37
04/02/2025 22:37
Joined: May 2018
Posts: 1,077
Born in Sicily, Live in German...
carmine Offline
club member 1915
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Born in Sicily, Live in German...
Greetings.
I understand your problem well, you would absolutely like to try with a direct induction tube eliminating the resonator but as Joe said (who is a specialist) he advises against this, at this point you can do nothing but invest a bit of money and really try if this modification is right for you by testing it, or accept the advice.
Have you already considered the idea of ​​finding a compromise, leaving the resonator and adding an open filter? Maybe I'm speaking sacrilegiously because I don't own a Vis but a turbo and therefore I'm zero in this matter having no experience, I can only tell you that almost always the advice on the forum has always turned out to be right, in the end yours is not an irreversible mod.

Re: 20V vis intake mod [Re: Imeant] #1675521
05/02/2025 15:25
05/02/2025 15:25
Joined: Feb 2024
Posts: 110
South Kesteven, Lincs
Echodelta Offline
Club member 2082
Echodelta  Offline
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On a journey

Joined: Feb 2024
Posts: 110
South Kesteven, Lincs
You may find the information on this page interesting:
https://planetsoarer.com/resonator/resonator.html

It’s about Toyota Soarers rather than Coupes but the principles are the same. They say that the resonator acts as a source of air and helps fill the cylinder with more air than a straight pipe. Removing the resonator had a negative effect on power across the board. Changing the resonator size gave control over higher rpm power vs low down torque.

Another interesting link:
https://physics.stackexchange.com/q...e-branch-intake-resonator-helmholtz-work

Last edited by Echodelta; 05/02/2025 15:29. Reason: Added a second article link

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