Air Induction Flexi Pipe - Alfa Romeo Forum
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(Post Link) post #1 of 80 Old 21-03-12 Thread Starter
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Air Induction Flexi Pipe

Mine has split on the corrugated flexible part of the pipe. This is obviously causing an air leak on intake and causing I think this is causing a little flat spot under acceleration around 4200rpm. I think this because the clip was loose where the pipe meets the plenum before and when I fitted a new jubilee clip it was cured.

Looking around it seems Alfa charge over 100 for the original part.

What do you guys think about these ones?

I've read some other forums where some of you guys have got rid of some of the resonator boxes. Is it worth buying some silicon hose from these guys..

Silicon hoses from Viper Performance

..and removing some the resonator pipes. I'm looking for a better induction noise anyway so this split pipe could be a blessing in disguise. If I remove some of the original system does this affect the MAF?

What piping would I need to buy.

Your input is appreciated.
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Paul.Spider
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Hi there, I had the same problem, been running a modified system for nearly a year with no MAF problems.
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Did something similar on my V6 156:

https://www.alfaowner.com/Forum/alfa-...ke-fitted.html
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(Post Link) post #4 of 80 Old 21-03-12 Thread Starter
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So am i right in thinking I need 2x 90degree 76mm pipes and 1x 45 degree 76mm pipe + a breather filter?
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This is mine at the moment
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(Post Link) post #6 of 80 Old 21-03-12 Thread Starter
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or one of the T-pieces for the breather take-off?

T Piece<br>Silicone Hose from Viper Performance
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So am i right in thinking I need 2x 90degree 76mm pipes and 1x 45 degree 76mm pipe + a breather filter?
Yup you are If I remember rightly I did mine with no straight pipe pieces. I found it cheaper to buy elbows with straight section after the bend so I could cut it back.
I also purchased a straight metal section to clamp to.

Hopefully this pic is better quality
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To keep the piping straight, the angle off the throttlebody is around 60 degrees. I found these at Merlin motorsport in all the colours along with whatever straight sections and joiners you need;

Samco 60 Degree Silicone Elbow (E60) from Merlin Motorsport

For the breather connection this is a neat solution (but pricey )

Self Sealing Hose Take Offs from Merlin Motorsport

I have the CF1 engine so I have two breathers plus the temperature sensor!!
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(Post Link) post #9 of 80 Old 22-03-12 Thread Starter
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If I come off the Throttlebody at 60degrees then use this T Piece<br>Silicone Hose from Viper Performance to connect the breather then a 90degree to the filter would that work? Also, excuse my ignorance, but what do you do to join them together? is there a pipe that goes inside where the 2 hoses meet and then just stainless steel clips to hold them together?
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I used two 90s and a 45, and yes I joined them with a specific metal pipe and clips. Got
Mine on eBay. Can't say whether your 60 degree will work. Perhaps get the dimensions and cut some card out? Bit old school but will work
 
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Yep, definitely cut out some shapes to check what you need (that's what I did ). The CF1 throttlebody has a slightly different angle so worth a check...

Joining pipes here;
Aluminium Hose Joiner 100mm LONG connector from Viper Performance

Have fun
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i recognise that picture those big clamps were rubbish (and expensive), remember to get bigger jubilee clips than the size of the pipe, i had to replace all the ones i ordered because they would not stretch far enough around. the silicone is thick so the OD is much bigger than the ID.

here's how it looks now.





also to the original poster, i have my old intake original pipe in perfect condition, if you dont fancy doing this, then you can have it for 40. send me a pm if interested.
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That photo is of my setup. I must admit I did base it on yours. I really like the clamps. I think they work well. I had to look around for the correct size though
 
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oh really, sorry paul, looked identical, it even looks like you couldn't get the pins through the clamps like me.
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(Post Link) post #15 of 80 Old 22-03-12 Thread Starter
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@Rix, What did you do with the breather pipe from the engine?
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bit of pipe and a mini filter on the end. shouldn't be a problem for mot, hopefully they wont even notice it. got one coming up soon so will report back if it does.
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no worries, I went the next size up and the clips worked a treat. I did use yours as a template though.

I used a self cutting t piece for the breather pipe instead of the filter route.
 
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Actually that may be yours, I picked the wrong photo. Thats a photo of yours I used I work from. I will log on my pc and post a photo of mine... Doh!
 
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Quote:
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no worries, I went the next size up and the clips worked a treat. I did use yours as a template though.

I used a self cutting t piece for the breather pipe instead of the filter route.
hmm, are you sure it's not my picture then? i can see the mini filter in it, sticking out just under the intake pipe.
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Here is mine.....
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is this just enhancing the look ??? or some benefit over a perfectly working air tight original set up ???
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(Post Link) post #22 of 80 Old 22-03-12 Thread Starter
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Cutting out the resonator box increases air flow. My flexi pipe on the OE Air induction system is cracked so I think i'm just going to get silicon piping. The guys above that have already done it will tell you about the benefits i guess
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No real benefit, a little more eduction noise. The only reason I did it was due to having a split pipe. The rubber goes brittle after a while.
Faulty air pipes are pretty common, and original Alfa ones are a rip off! Can't remember the price off hand just remember thinking it was a lot and preferring the look of the home-made ones.
It clears a little clutter out of the engine bay too. Which will help a little with cooling I guess.
 
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Same here, no particular gains to report, but it wasn't detrimental either, it certainly made the BMC CDA noisier than before
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Paul, i think somebody has done it before but could you post some links to the peices that you bought?
Thanks
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