40 hp throttle ring thermostat with fixed flaps

[KingAir42]

Is it possible to use fixed open flaps combined with the throttle ring thermostat setup? Or will it interfere with the operation of the ring mechanism?

Also, looking for opinions…

I am almost finished rebuilding my 40hp stale air engine. Meanwhile, I just purchased a spare engine but it is a fresh air setup with very nice heater boxes.

The fan shroud on this fresh air engine I believe is aftermarket crap, there’s not even a hole for the throttle cable. I am considering keeping it fresh air, but I can’t locate a fresh air breastplate tin. I searched the classifieds and eBay.

The other option would to switch it back to stale air, but then I’m pretty sure the builder didn’t use those rings around the cylinders which the stale air engines require.
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A stitch in time saves nine

[tasb]

Very good question there. On my 36 horse there are no flaps just the throttle ring. Not as familiar with the 40 hp.

That fan shroud should be scrapped!

Put a wanted ad in the classifieds, you will find one easily. It’s a part not often called for so it’s not listed often.
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Roads Scholar
1957 Kombi low mileage 36 hp governor equipped M 178 Slow Drag Winner 2014, 2015, 2018

1965 hardtop Deluxe Microbus owned since 1990 M 620 factory 12 v 1500cc

1961 (October)Single Cab- Road Trip Workhorse

Member# 2059

[thomas.]

I've installed both systems over the years but it's been a few years & I don't have the memory like my younger years. I've included a photo from around 5 years ago when putting my stale air system on current 40hp. It seems the linkage will be obstructed by the fresh air flaps although I've never tried.

[KingAir42]

I mocked it up with the fixed flaps, and it does seem like it will interfere. I was just wondering if it was possible. Also, I found an old thread on here and sent a PM. He has some fresh air tin he will sell to me.

Also, in my photo of the engine, where would the pre heat hose to the air cleaner go?


And does anyone have any experiences with wolfsburg west stale air heater boxes? Do they work ok?
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A stitch in time saves nine

[EVfun]

A quick read in Progressive Refinements indicates that:

The fresh air heating system started in December 1962.

The fan ring was replaced with internal flaps starting in August 1964.

So there was a number of 40 horse engines produced that used a fresh air heating system and the fan ring thermostat system.
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[matthew henricks]

Can you clarify what you mean by "fixed flaps?

I have a complete throttle ring on my April 64 fresh air motor. (Bottom of this page)

https://www.thesamba.com/vw/forum/viewtopic.php?t=...;start=300


Trying to understand what flap your talking about to help but not familiar with the stale air system.
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1964 Original Owner build Thread. https://www.thesamba.com/vw/forum/viewtopic.php?t=702135&highlight=

Ambulance Fan's. https://www.thesamba.com/vw/forum/viewtopic.php?t=627707&highlight=

Parts i am looking for:
64 bug nice used front/rear Black LHD floor mat.

[mukluk]

You can install one style of thermostat setup or the other, you can't have both. Honestly, I don't see where there'd be any advantage in trying to combine them.
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1960 Ragtop w/Semaphores "Inga"

[KingAir42]

[matthew henricks]