Where does the flex hose go to?

The free end just stays in the "ring" -- it blows fresh air onto the diff/header area for cooling.

 

Added,,, "Cooling the alternator."

ciao, Edwardo

 

There was a previous post here on the subject. The poster stated the hose was connected to a duct that directed air into the converter area. Another stated that i was to directly cool the inner CV Boot.

While one on my cars had the hose connected to the duct as the first poster said, the other was fastened by a ring on the chassis and the hose/air was directed to the CV boot. I have both of my cars now set up to blow air onto the CV boot as was stated by an experienced individual. I figure, since there are two ducts on either side of the car, and the ducting on the driverside does not have a hose nor a place for the hose to connect to on the oil cooler intake, why would the passenger ducting be connected to the intake duct? Made sense to me, especially after hearing about the CV situation from a professional.

 

It is, actually for cooling the right side inner cv boot

 

The 'big question' I have is - has anyone found an inexpensive source for direct-replacement of this hose?

BTW, why would anyone aim this hose at the CV Boot, and not the Differential and rear Headers (greater sources of heat)?

 

My recollection is that some of the heater hose (a sort of bendable, corrugated metalized cardboard) used on the engine ducting of an air-cooled VW makes a good substitute (but that's from 15~20 years ago).

 

I don't know which hose this is as I have a gt4, but if it is 50mm ID then you can get a length for literally a few $$'s as it is used on VW beetles and buses.

Lee

'77 GT4

 

The one in the rear is smaller than 50mm?

50mm sounds about right for the one connecting the under dash vents, though...

It was to keep the new CATS from cooking the CV joints, maybe the alternator benefitted but it's in front of the engine...IIRC.

I don't have one either, Lee!!!

 

The ring was most likely a Factory installed item, on a 1978.....

 

For flexible air hoses like this, the best source I have found is Aircraft Spruce. They stock metric sizes, as are appropriate for the heater (air) hoses in a 308!

 

I have noticed in my 1984 QV a host ring/clamp for ductwork for the alternator - a friend has some orange hose that is connected from there and points straight DOWN. Hose is orange with black strips along the wire/ridges, metric sized. Different duct, though. I'm having a hard time understanding that paper ducting would work well in a hell-hot, mid-engine application....I'll do some online hunting, though

 

Not going to cool the header enough to matter. The rubber CV boot is what needs to be kept cool.

 

That someone was Ferrari and it didn't need to be removed to get the cover off.

 

Depends on how he handled the A/C compressor, maybe.....

 

Blowing air needed to cool a CV joint? The world is full of cars that don't need them cooled. WHy does a 3x8 need it? (not trying to be a smart@zz, just want to understand)

 

Obviously they were addressing a problem. Otherwise why would they bother?

 

Because they wrapped the exhaust manifold around it and it was out of the airflow. They are not cooling the joint, just trying to save the boot.

 

"Obviously they were addressing a problem. Otherwise why would they bother?"

I just want to understand what the "problem" is. No other cars that I am aware of seem to have this "problem." I'd just like to know why. I've been working on cars/engines all my life and I'm not comfortable with not understanding why something is set up a certain way, especially when it is different than the same application in any other vehicle.

 

The way the (wrapped) rear header and diff blocked off the area, already made it kind of iffy -- then in '78, they added two cats very close by and had to put a heat shield under those which just made a marginal situation terrible. Here's a shot of the '78-'79 US 308B/S exhaust -- both cats are surprising close to the half-shaft and sort of form another "wall" closing off another face of the cube. Not many other cars have the transverse mid-engine rear-drive layout -- it would be interesting to see if was also an issue on the NSX and how they dealt with the problem.
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That isn't a CV boot cooler, it is a water drain hose to keep rain water out of the airbox. They just dumped it low to keep the water off the motor also.

Doug

 

I wondered about the water drain thing initially but water drains in airboxes are usually just a small piece of tubing - something that big will actually affect the airbox resonance (intake tuning) and also eliminate any "ram-air" effect at speed - though both factors could be intentional and designed specifically for that.

 

I doubt this, as there is a distinct horizontal 'slit' opening molded into the rigid plastic duct that appears to be for drainage. This duct work appears to extend well-into the engine bay, based on the location of the mounting rings welded in-place. Too much work and materials just to get rid of some rainwater - and if this hose is/was a foilpaper and wire construction, wouldn't a lot of water rust and rot the ducting?