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AA Performance Thing shroud with type 4 oil cooler
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kubelmann
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PostPosted: Tue Nov 21, 2017 6:57 pm    Post subject: AA Performance Thing shroud with type 4 oil cooler Reply with quote

AA Performance products has some nice looking Thing cooling shrouds for some Thing in need.... I have no connections with AA other than using their good priced pistons and jugs with happy success.


https://aapistons.com/collections/sale-items/produ...oil-cooler
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74 Thing
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PostPosted: Tue Nov 21, 2017 9:35 pm    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

http://usstore.concept1.ca/Fan-Shroud-W-OHeat-W-Holes-COOLED.1.2-62217/

I believe this is the product they are selling.

They do look nice, although I never need a type IV cooler.
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kubelmann
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PostPosted: Tue Nov 21, 2017 10:21 pm    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

I only ran into the AA site with the shrouds today. The shroud you listed is a lower price. The type 4 addition is an old offroad trick for larger motors with higher compression. In the path of building high compression 1915 motors, I have built/modified a number of Thing shrouds to hold a type 4 cooler. It is cool to see a modification that was previously hand built from two shoruds now available without clean air holes. A used stock 73 shroud has been $250 for a long time now. So, a new one made to the same speces is a nice deal especially for an owner without fabrication skills. It is cool that you listed a lower priced source...
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EDragnDean
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PostPosted: Wed Nov 22, 2017 12:51 am    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

They should include a custom hoover bit
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kubelmann
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PostPosted: Wed Nov 22, 2017 5:12 am    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

Here is the guy who makes the custom Hoover bits. This one is for a type 4 cooler
www.thesamba.com/vw/classifieds/detail.php?id=1193280[url][/url]
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Glenn Premium Member
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PostPosted: Wed Nov 22, 2017 6:58 am    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

No coil mount nutserts.

As for the T4 oil cooler.. i had one on my 1904 and didn't notice any improvement. My current 2180 has a Type 1 oil cooler (Genuine 73 Type 181 shroud) and it runs as cool as stock.
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74 Thing
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PostPosted: Wed Nov 22, 2017 7:49 am    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

I believe that the type IV cooler was due to the info in the Berg blue book.

If my memory serves me right Jake Raby did a test back in the day and indicated that it did not help since no more air is being diverted over the larger cooler when compared to a type 1 cooler.
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kubelmann
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PostPosted: Wed Nov 22, 2017 8:02 am    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

The point of my original post was to let folks who had not seen it aware that there are some rare shrouds in ALL styles at a reasonable price and nice looking quality. They have all flavors from straight stock to modified. It was not a pitch for the t 4 oil cooler conversion... I did not notice the missing coil nuts ~~good eye Glenn...
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Wildthings
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PostPosted: Wed Nov 22, 2017 9:48 am    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

It would be interesting to see if this setup had any positive effects on cooling with no down side. I have bought a late model Bug fan shroud with the factory velocity ring and will install it the next time my engine is out. Might do the T-4 cooler swap as well as I have multiple T-4 coolers available.

Have also thought about building a bulge in the body (the back shelf area on a Thing) to give a larger crossectional area for air flow in front of the fan inlet. The inlet area has just always seemed restrictive to me. Others thoughts on doing this?
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Jake Raby
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PostPosted: Wed Nov 22, 2017 9:16 pm    Post subject: Re: AA Performance Thing shroud with type 4 oil cooler Reply with quote

Never saw a benefit from this... Back to back the oil temps ran the same, or hotter, and the CHTs suffered on cylinder #1.
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