GeaBaldyVx

After spending most of my day yesterday under the hood and replacing fuses, switches etc... I noticed my air intake hoses are a bit... worn... and among that they seem to be awfully cheap, which is not something I would have expected. Has anyone replaced these hoses with something a bit better, maybe something that doesn't cause the air to cavitate as it is on it's way to the airbox?

Airflite40

the venturi was supposedly to reduce intake noise. it doesnt really affect flow that much to where it's noticable. there are others who have made straight tubes from mercedes parts. i think motorsports slc sells them

GeaBaldyVx

Now who in their right mind would ant to make this engine quiet? Thats like wanting to put a Type-R badge on it to me.. this engine should be heard in all respects... within reason... beign that I haven't actualy felt a replacement in my hand are they as "cheap" feeling as my 23yr old intakes.. meaning the ribbing feels paper thin and the smooth tubing is as collapasable as paper to the touch?

Ketchmi

We do have upgraded replacement tubes available. You can purchase them from us for $69.95 a pair in the color of your choice or try to grab a set on E-bay when we list them.

Airflite40

what year is your car? by reducing the intake noise i mean the 'sucking' sound from the air being drawn into the intake. the plastic should not be as you describe...

GeaBaldyVx

Ah good to know.. so years of heat and wear have degraded them to this point... So maybe an appology is in order for the cheapness of construction and materials. I am thinking I'm going to make some measurements and sit down w/ CAD and come up with something myself. No offense Dave your product looks solid and if I didn't simply want something to do this afternoon I'd pick one er.. two up...

PorKen

81-84, 87-91 have the venturis - 928 110 272 04

78-80 had straight paper tubes - 928 110 272 ??

85-86 tubes are left and right, and NLA - 928 110 272 11, 928 110 272 21

92-95 have insulated (for sound) straight tubes - 928 110 272 13

Kore928

Who was the guy at SITM that made alluminum intake tubes? I was really digging them. One of my future projects.

Alan

Try these two threads for ideas:

https://rennlist.com/forums/showthre...eferrerid=6055

https://rennlist.com/forums/showthre...eferrerid=6055

Alan

chaadster

That's Airosey's car. They do look sharp!

GeaBaldyVx

I dunno about using Aluminum as the intake. I have never understood why companies continue to use them. The entire purpose is to get air, the cooler the better, into the intake. to me puting this big hunk of heat absorbing aluminum near a hot engine I would think sap some performance. Granted, they do look good, and they are durable as hell.. who knows maybe I am missing something.. well other than a screw loose for even owning the car.. :-)

Nicole

Jörg Austen, retired Porsche Engineer, writes in his documentation on the 928 that the venturi style intake hoses were introduced to meet stricter noise regulations in the early 80ies.

I'm not sure the venturi style tubes are cheap to make. Just because something is made of synthetic materials does not automatically mean it's cheap - particularly not at the low quantities that 928 production requried.

So, here are two things to remember:

1. Everything Porsche does is for a reason, even if it's not immediately obvious.
2. Nothing Porsche does is ever cheap, even if it may appear so at a first glance.

RDS928S

Yup,

those aluminum intake tubes are probably good for 5-8 hp loss once they get heated by the motor. The under hood temps are sky high. I can't even rest my hand on the strut bar after the engine has run for a while.
The only way aluminum will work for intake purposes is if they are ceramic coated.

RDS

RicerSchnitzzle

Most auto stores have the poweradder line of modular intake pieces. They are fake chrome over ABS. You can get that cool chrome import tuner look you desire, and make it fit just fine the the rubber boot adaptors. If that floats your boat, you can piece each side to gether in minutes. About $6-10 a section. You can even Add dual K&N style filters for that trip to Japan to do some F&F drifting with your shark.

http://www.powerflowracing.com/spect...sp?PG=2&PSG=32

I just got a brand new pair of stock venturi hoses for $30 total at the local Porsche graveyard. They were sitting in the hatch with the stickers still on them. Guess the owner was going to replace them right before he wrecked the shark.

Nicole

PS: Whatever you replace your tubes with, make sure it connects to the hole in the timing belt cover. It sucks hot air out of that area, which should help the durability of the belt.