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Old Oct 4, 2023 | 01:58 PM
  #1  
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Default 78 refresh questions:

1) http://www.autoatlanta.com/porsche-p...section=105-05
#44 and #45
What hose do I need to obtain to fit these?

2) Same drawing, what hose now replaces #46

3) Where do I find 2.5mm vacuum hose for the top end/egr functions? Not silicone.

4) http://www.autoatlanta.com/porsche-p...section=105-05
What do I use for #27 and #33?


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Old Oct 4, 2023 | 02:18 PM
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If you're concerned about getting close to correctness this is what it all looked like originally:





44 and 45 are NOT molded but had this weird slow spiral seam in them. Appropriate size water hose is fine and these guys have nice stuff: https://belmetric.com/hose/

They also got Vac hose down to M3 which works fine on all this stuff.

The molded hose going to the rad is a molded hose, not spiraled. I've only used "used" ones but there is room to make the turn with a straight hose..(not as pretty)

Last edited by drooman; Oct 4, 2023 at 02:21 PM.
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Old Oct 4, 2023 | 02:21 PM
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They dont have to be "correct" just the right size...that radiator vent hose..ya..tough one.

Helping a friend refresh a very nice mid year '78 rescue...well, nice, all thing considered, and it's survival story.
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Old Oct 5, 2023 | 11:36 AM
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My solution to #46 (which was missing in my car) was a molded elbow hose trimmed to fit, and an inline coupler to some bulk hose.

Not at all concours correct, but it is functional.

Last edited by Hey_Allen; Oct 5, 2023 at 11:37 AM.
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Old Oct 5, 2023 | 01:08 PM
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For #46, I don't recall any problem with fitting a straight hose.

Originally Posted by Hey_Allen
My solution to #46 (which was missing in my car) was a molded elbow hose trimmed to fit, and an inline coupler to some bulk hose.

Not at all concours correct, but it is functional.
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Old Oct 5, 2023 | 01:34 PM
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Originally Posted by Jadz928
For #46, I don't recall any problem with fitting a straight hose.
Do you recall the ID?
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Old Oct 5, 2023 | 04:23 PM
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Originally Posted by Speedtoys
Do you recall the ID?
all three are 6mm
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Old Oct 9, 2023 | 12:58 PM
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Originally Posted by Speedtoys
1) http://www.autoatlanta.com/porsche-p...section=105-05
#44 and #45
What hose do I need to obtain to fit these?

2) Same drawing, what hose now replaces #46

3) Where do I find 2.5mm vacuum hose for the top end/egr functions? Not silicone.

4) http://www.autoatlanta.com/porsche-p...section=105-05
What do I use for #27 and #33?
I just did this:
- #46 available thru Porsche (later model cars) but not long enough to do 44 (by an inch or so - insert curse here)
for 44 and 45, I used bulk hose

- i yanked the EGR and it’s 6 or so vacuum hoses. Very happy with how it runs but I don’t have to deal with Cali smog.
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