328 air intake hose - scoop to filter box

Mine's falling to bits too. I'm thinking its heading for Duct tape soon. A replacement looks pricey.

My guess is its covered in foam as some kind of insulation. Cold air make um F'car go faster (!) so keeping the Instake duct cooler would be better I s'pose.

I.

 

I used the following:
http://www.aircraftspruce.com
05-30616 AERODUCT TUBE SCEET-16 4" ID

4 1/2 inch diameter aircraft ducting. Wire core for constant diameter when bent, fiberglass impregnated, heat resistant to 500 degrees. Not concourse look.

- You have to destroy the original hose to get the end caps off and use them on the new hose. No going back.

- Old hose is held on by friction, just wiggle/wrestle it off the airbox and the lower side intake scoop.

- New hose wants to maintain a straight shape. Take the old end caps off and clean them of foam and adhesive.

- Slide the new hose into the end cap and seat it in the inner lip of the smaller diameter end.

- With one end on, slide it onto the lower side intake scoop. You have to do this blind, but can help pull it into place by reaching in from the side of the car through the scoop. The new hose will want to stand straight up. Be careful not to scrape it on metal bolts and lines. It tears easily.

- Now place the other end cap on, and wrestle it on to the air box. The hose will keep a constant diameter and really fill the space. May take some twisting and moving to get it to clear other parts.

- New hose doesn’t look like factory (it might if it was black).

- But it is a more efficient smooth path for the intake air, with no restrictions or pieces of loose foam.

- Slight intake whine at speed with the top off from the passenger side.

- Hose is from Aircraft Spruce company. Cost is about $15 per foot, so buy some extra since you may tear it on the first try.
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I spent about 6 months looking for a factory replacement without any luck. If you really find a factory hose for $70, get it. I don't think one will turn up new, but maybe from a parts source that has parted out a car.

The noise may be there since the foam is gone. I think it is just a straighter path from the intake noise to the outside scoop, and more of it gets out.

If someone could recreate these hoses or invent a suitable replacement (as I look at the "High Output Intake Hose on Ebay" thread), they could sell one to every 328 owner with the same problem.

 

I understand the 88.5 and 89 hoses are essentially unobtainable, but try T Rutland. He told me he had one ane maybe he can help you. It will cost $$$

Dan

 

I too destroyed my hose with a pressure steam cleaner. however it was a while before i realised it. It tore and gaped open on the blind side. My car ran sick, and sounded sick. I nearly sold it.

After replacing my hose with black air ducting very similar to the orange stuff above, also reusing the origional hose ends i could not believe the increasein performance ( not sucking in hot engine bay air anymore) as well as an improvement in engine bay sound ( i assume unwanted sounds not being emitted from the door intake scoop behind my ear anymore. )

To fix this is a must in my experience.
Ps. The dealer here quoted me R6000.00 or $882.00 for this pipe admitting he was getting it from Ferrari UK.
The double walled rubber ducting ( it looks exactly just like the big hose that goes into the intake manifold from the rear, atop the engine anyway ) cost me R65.00 or $9.95.

Skin.

 

Do you have a picture of it?

rgds

Iain

 

Nope. but if you really want one pm me and i will take one and mail it to you as i cant post pictures here.

Skin

 

I recently noticed a change in the noises coming from under the engine cover and felt differences in performance. On checking I found the foam on the air intake tubing had completely dis-integrated.
My solution.....I cut the wire mesh out of the plastic end pieces and bought flexible aluminium tubing as used in tumble drier installations Hee Hee.
Also, my theory, as the tube is completely sealed now, maybe there is some ram air at higher speeds. Cant tell really, as here in Switzerland it is too risky to put the pedal to the metal.

 

We do have one OE duct in very good condition from a 31k mile 328 we parted out. We have kept it as a sample to try to find a suitable replacement. We have our "protipo" on a car in CA undergoing testing right now. It does not require the use of the ends of the original hose. I will know more in 30-60 days.
Brian

 

I assume the same on 308s? I'll have to check mine.

I recently replaced the air intake with a Motovanti and a new Larini exhaust and have seen an increase in performance. Prob more the exhaust than the Moto. Moto looks much better than stock.

 

For some unknown reason, Ferrari decided to change the air intake duct from a fiberglass part that had worked sine 1975, to the self-destructing foam/wire mesh unit (p/n 136008) on 328's from s/n 78069 and higher. I have seen more than one "collector" 328 (with less than 500 miles) that this foam duct still disintegrates. We have been working on alternatives, keeping "originality" at the forefront of our thinking. While our "protipo" doesn't look like the shiny plastic wrapped original part, itsa black, and itsa Ferrari part! We'll let you know how it turns out.
Brian
T.Rutlands