Horizontal T4 Cooling Fan Shroud Info

[sweetlokin66]

Figured id dig up an old thread for some new idea's:

First mockup of my home built setup using a Porsche fan







It may look rough on the outside but it pop'ed smooth as glass. Im thinking about doing some CF ones

[Bills914-4]

Damn looking real sweet, you've been a little busy since the show & shine party, you mention something about CF , it sounded plural
like you might make more then one , if so , let me know I would deffinitly be interested in one , it would look cool in the 914 &
allow me more working room , keep up the therapy , take care Bill D. , one of these days I'll have to cruise by the shop I've made a few changes to the 914 ,

[NextGen]

Love your work!!! The biggest issue is the fan belt as I am sure you are aware. I am a industrial designer in the elevator industry and was given the task of making an elevator rail riding device that can travel faster then the previous 500 fpm and match the speeds of 1600 fpm for the 248 elevators at the Twin Towers of the late WTC. I took the old designs and beefed them up to what I called the OFF ROAD VERSION,ha.
I use automobile wheel bearing, etc. They worked great for three years, till 9-11. I wonder did you work off the original fan pulley design and beef it up.

[Type 4 Unleashed]

There is this very professional Porsche tuner in Sweden (ex ACVW guy) Micke Svens who did his own version on a 911 and if I am not wrong from the pictures I saw he used the gear drive from an outboard boat engine.
But hey, correctly engineered this works well even if it is awkward to bend and twist the belt.
Angled pulleys and right set up should be OK. Maybe higher service level on the belt but that is a low cost.

Today I have "beautified" by pulley bracket with a lot of drilling and cutting.
No pictures until it is chromed and ready but apart from looking better I think I halved its weight.

I have these two Reichert set ups and have wanted to do a gear drive also to do away with the belt, and the 90 deg drive from an out board is a good idea, but I have been looking for a 90 deg drive from a motorcycle which is smaller and I think can be modified to fit in place of the pulleys, like from a BMW. I always check the motocycle row at the junk yards looking for the drive, it's only a matter of time till I find one. I have put a hold on working on my 914, I have back slid and have gone back to American Muscle...

[Passatman]

Wish i could find one of these horizontal setups.

[Frallan]

Outboard boat engine?

[sweetlokin66]

Damn looking real sweet, you've been a little busy since the show & shine party, you mention something about CF , it sounded plural
like you might make more then one , if so , let me know I would deffinitly be interested in one , it would look cool in the 914 &
allow me more working room , keep up the therapy , take care Bill D. , one of these days I'll have to cruise by the shop I've made a few changes to the 914 ,

It's good to hear feom you bill. I need to get my ass into gear and finish up the entire car. Next is fitting thw motor back in and finishing up the tinwork!

[sweetlokin66]

Love your work!!! The biggest issue is the fan belt as I am sure you are aware. I am a industrial designer in the elevator industry and was given the task of making an elevator rail riding device that can travel faster then the previous 500 fpm and match the speeds of 1600 fpm for the 248 elevators at the Twin Towers of the late WTC. I took the old designs and beefed them up to what I called the OFF ROAD VERSION,ha.
I use automobile wheel bearing, etc. They worked great for three years, till 9-11. I wonder did you work off the original fan pulley design and beef it up.

It's designed up in my head, I figured I would start with this and see how it worked. It looks like I need to open up the pulleys some more after seeing some of the highlips on other setups. There 7 series aluminum with a 2 1/2" bearing so I'm not to worried about premature failure. I'm just using the original porsche fan belt pulley as the tensioner.

[sweetlokin66]

Outboard boat engine?

http://www.sterndrive.info/outboardmotor/id4.html

Seems like it would work in theory. You would just need shafts long enough or have some made. And enough brewskis

[CobraJet]

....... or just look for the proper gearbox.

https://sdp-si.com/eStore/CoverPg/Right ... Drives.htm

[Frallan]

Buy something new???? Wow that is a new thought.
Nice website. Like it and saved it. Thanks!

[Piledriver]

....... or just look for the proper gearbox.

https://sdp-si.com/eStore/CoverPg/Right ... Drives.htm

Those are not the proper gearboxes for a ACVW cooling fan.
Check the max tq and RPM rating on those...
virtually all of them are sub 1 HP, and most of them lack the RPM required.

Any fan is going to need ~20 HP capacity, plus a slipper/limiter clutch most likely.

They make 300++ HP outboards.

V-belts are not horribly efficient, but they have several "golden" features for the application.
They can turn corners, alignment is about as forgiving as it gets, and they can//will slip.
("Will slip" is absolutely a feature in this particular application)

[CobraJet]

Just sayin', why use an out drive from a marine propulsion when you can get the proper 90 deg gearbox without all of the extra gear. Someone somewhere makes exactly what you would need here. Stock Drive Products website was mentioned because I have used them for gearing on something else before and I noticed that they had the 90 deg gearsets.

[Manx1173]

Here is an outboard drive on a Corvair engine.

[Frallan]

Wow!