Colored hoses, Are they still available? Or has anyone tried dying a hose? Options

[TonyA]

Maybe i ma crazy but are these available anywhere, or has anyone ever attempted to bleach and dye a hose?

[wonkipop]

something not in discussion so far is the 914/6.

in 1970 theres two fuel systems in 914s.

EFI as per vw in the 4.

2 large 3 barrel carburettors with 6 float bowls, or is it two large float bowls one in each carb?, in the 6 (as with most 911s, a few ran k jet or MFI, but a lot ran carbs - even in USA?).

as an aside - by 73/74 the 911 had gone over completely to fuel injection in the usa?

6 bowls/2 large bowls is a very large vapour load on hot shutdown, (heat soak phase).
it would track back to the can through the suction line.

thinking if:

a) there were two systems plumbed in early cars from (69)70 to 72/73?
or
b) porsche plumbed 4s and 6s the same way but designed the system for the 6.

its the one thing that is a tangible difference between porsches and the vw porsches (4s).

porsche plumbing of the evap system in the opposite manner would make sense to me then. vapor load from the massive carb setup would be significant enough to plumb the can so that the full length of the carbon contents could absorb vapors after shutdown before full saturation and vapor leaked out the fan hose at the opposite end located near or adjacent to the tank vapor line (with still some carbon separating those two).

i found other material in my files from independent publisher shop manuals that indicates vw plumbing for 914s. cypress manual 1986 and carbooks manual 1972.
probably means nothing. could also be a tech research error.

one way you could verify it with early cars since the lines disappear into the sills and emerge at either end in the front boot (trunk) and engine bay would be to pull them off and do a blow test to see which is which?

its easy to track the lines in a 74-on car - all fully visible in engine bay.

with early cars its a little harder to know for sure which hose was what at either end - and were they the same in a 4 or a 6 when they popped out at either end.

has anyone ever done that - verified the plumbing on both an early 4 or 6 matches the pre 74 emissions warranty and porsche evap layout?

its all academic - the system will still work either way as SB says. the vapors are entering a can full of charcoal and coming out of it again. i think one set up purges more efficiently than the other. originality and preservation are another matter.