Hot air blower nozzle, Anyone have one to sell me? Options

[trojanhorsepower]

The dual outlet one. I will add a photo.

[Montreal914]

I might have one. You are referring to the “Y” that attaches to the blower, right?

[bdstone914]

@trojanhorsepower

' date='Oct 18 2025, 05:05 PM' post='3228855']
The dual outlet one. I will add a photo.
[/quote]


Dual or single outlet as pictured?? I have many single outlet.

[trojanhorsepower]

Thanks guys Dual like pictured.

[wonkipop]

its actually a part from a VW 411/412 variant (square back). the y splitter.
if you can find one of those cars (almost as rare as a 914?) in a junk yard and the heater hoses are still there on the engine you could score one.

the 74-76 came with just one hose, left hand side in original form. the dual hose set up on the later cars is not a factory thing its a dealer and owner mod back in the day using the VW part. unique to the variant version of the 411/412.

(IMG:style_emoticons/default/beerchug.gif)

[chmillman]

There are a number of threads here on people who have designed and 3D printed their own versions of the Y connection, with files posted to download. I have mine done here, just haven’t installed it yet. There is a bit of debate about its real usefulness IIRC.

[wonkipop]

There are a number of threads here on people who have designed and 3D printed their own versions of the Y connection, with files posted to download. I have mine done here, just haven’t installed it yet. There is a bit of debate about its real usefulness IIRC.

you could be right about the usefulness.

i think vw or porsche, whoever was in charge of the decision, probably porsche changed it to a single hose for good reason and in reaction to the original twin hose design.

the twin hose fan of the early cars really was directly transposed from the 411 installation in the VW sedans----which had a big cabin. i think the 914 with its small cabin could really fog up quickly inside in frigid cold winter conditions. so if you biased the fan to one side (the drivers side) you could at least blast the windscreen clear of fogging with more power to the critical side for the driver.

its just an opinion because practically speaking i don't know. i've never really driven my 914 much with the top on, in a frigid cold winter (australia, get serious about frigid winters.... (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/biggrin.gif) ) so i've never fogged it up. and my fan is still biased left with a single hose and i sit on the right.... (IMG:style_emoticons/default/biggrin.gif) but thats why i think they went to a single hose whenever that was....73 i think? or maybe 72? whenever it was.

[bdstone914]

Keep in mind the electric fan only provides air when it's pressure is greater than the engine driven fan. Mainly low speed and idle. It blows shut the flaps at the bottom of the fan shroud. Living in California I'm eliminating the fan to clean up the engine compartment. It i need more heat i will rev the engine. Driving old VWs in Michigan we would drive in 3rd gear to get enough heat to keep the windshield clear. And heat in a VW bus was just enough to keep water from freezing

[Steve]

I thought Auto Atlanta sells a reproduction of this. I bought one a while back.

[trojanhorsepower]

hmmm, I do have a 3d printer, Anyone know the name or part number for this bit?

[wonkipop]

hmmm, I do have a 3d printer, Anyone know the name or part number for this bit?

it is not in the 914 PET catalogue.

what is listed in the PET is the standard square to single circular adapter piece for a single hose.
these parts are all listed at the very end of the section on the exhaust system page.
along with the later fan. all clumped together after #48 on the diagram. they have no numbers which reference the diagram and the later fan set up for 73 onwards is not drawn in the diagram.

where it is shown is in the parts catalogue for the VW 411/412.
but i do not have a part # for it.
just the diagram from the 411 catalogue.
this.




the way it went is that the 411 always had two different blower fan set ups.
the 4 door and 2 door sedan had the blower motor with two outlets either side and two hoses centrally mounted above the fan housing. early 914/4s used this set up.
70-72.

the variant (station wagon) 411/412 with its much flatter engine bay under the rear cargo area used a single outlet fan offset to one side of the engine with the adaptor transition piece that fitted to the square outlet on the fan and branched into two circular outlets for twin hoses. later 914 1.7, 1.8 and 2.0s used this variant fan but had their own unique adaptor transition piece that went from a square fan coupling to a single circular opening. that unique standard part for the 914 is what is listed in the PET.

you would need the VW parts catalogue for the type 4 to reference the part #.
but it would not be much use as this part is long not available from VW.
if you wanted a reference part to copy in order to make the adaptor your best bet would be either a junked 914 that had the modification part fitted or find a junked 411/412 variant with it still in place.

what was happening with the twin hose set up is that either dealers worked out this mod was possible, given it was VW parts, and offered it to customers or owners somewhere along the way in the 70s figured it out and did the mod. but the twin hose set up you see on some 73-76 914s is not a factory set up or factory option. why its not in the parts catalogue.

[Artfrombama]

I have the single and the cabin temps are way more than adequate even in sub-freezing temps.

[trojanhorsepower]

Found them!
STL files for both.

[Dave_Darling]

the 74-76 came with just one hose, left hand side in original form.

In the US, it was the 73-74 cars that only had one hose.

The 75-76 cars used the splitter piece to feed both heat exchangers. I'm guessing that the factory probably recognized that the late-style ones were not as good as the early-style ones.

Not surprising that they used 411 or 412 parts, though. After all, the engine was designed for the 411 in the first place.

--DD

[wonkipop]

the 74-76 came with just one hose, left hand side in original form.

In the US, it was the 73-74 cars that only had one hose.

The 75-76 cars used the splitter piece to feed both heat exchangers. I'm guessing that the factory probably recognized that the late-style ones were not as good as the early-style ones.

Not surprising that they used 411 or 412 parts, though. After all, the engine was designed for the 411 in the first place.

--DD

have quite a few 75 1.8s on L jet data file. good original unmolested examples.
all single hose fan.

can't speak for the 75 or 76 2.0s. but 75 1.8s had a single hose.

of note - approx same numbers of 74 1.8s as 75 1.8s these days have been later modified to two hose set up - also evident from data collected. nothing in PET indicates two hose for 73 on and no special part is listed.
points to being later mod or a dealer available uodate. being 50 years ago think this might have been a popular modification/update carried out by owners early on.

i can certainly remember the kits being advertised by tweeks and other 914 specialist part houses from back in the day in the late 80s and into the 90s.

(IMG:style_emoticons/default/beerchug.gif)

[wonkipop]

the 74-76 came with just one hose, left hand side in original form.

In the US, it was the 73-74 cars that only had one hose.

The 75-76 cars used the splitter piece to feed both heat exchangers. I'm guessing that the factory probably recognized that the late-style ones were not as good as the early-style ones.

Not surprising that they used 411 or 412 parts, though. After all, the engine was designed for the 411 in the first place.

--DD

you got my curiousity up.
i have had a quick look at my 1.8 data.
with the proviso i have not looked much into the 75 info except to work out what was going with the dizzy hook up and throttle bodies as compared to the 74s.

there might be something in what you say. but its not that all 75s were fitted with the double hose fan set up.
could be that similar to the 74s there is staged introduction of parts and updates.

i've taken a quick look at what i have compiled.
what i am seeing is it could be that 75MY cars built in the 74 calendar year still got the single fan hook up same as 74MY. i have sept/oct/nov 74 build dates, very original low miles examples on file. with single fan.
and i pulled up one from may 75 near end of 75 1.8 production run and its got what looks like original parts twin hose. if not a factory instal then definitely using type 4 variant parts. has fine ribbed plastic hose still fitted to the long hose matching the short hose.

its entirely possible that some way through 75 MY production run they did a switch over.
i would need more reliable examples on file to get to a reasonable conclusion and pin point a changeover date. but i think its a distinct possibility.

however my info is limited to 1.8 L jet examples.
so i don't really compile anything on the 2.0 cars.

(IMG:style_emoticons/default/beerchug.gif)

[chmillman]

Here's mine again just in case. I didn't want to remove the square-to-round part from the blower, so it is designed to go over the round part. The longer end points toward the passenger side of the car, the shorter end is angled upwards and should work fine with the existing hose.

It was designed to be able to be printed without needing any supports. I have a CAD file (STEP) if anyone wants to continue to work on it/modify it.


 SplitterNew5a.zip ( 1.89mb ) Number of downloads: 6

[914Wes]

part is 461261831 (A)




3d file can be found below:

Porsche 914 Warmluftverteiler doppelt / 914 split Fan Duct

[trojanhorsepower]

You guys rock. Thanks!

[barkamatic]

Here's mine again just in case. I didn't want to remove the square-to-round part from the blower, so it is designed to go over the round part. The longer end points toward the passenger side of the car, the shorter end is angled upwards and should work fine with the existing hose.

It was designed to be able to be printed without needing any supports. I have a CAD file (STEP) if anyone wants to continue to work on it/modify it.


 SplitterNew5a.zip ( 1.89mb ) Number of downloads: 6

That is a very nice print. What is the material?