[Healeys] AH BN1/2 Float Bowl Cooling Fan

[Curtis Arndt]

Ken

Revotec makes a "Y" splitter..

[image: image.png]
In-line Blower Fans – www.revotec.com | Automotive Cooling Specialist
<https://revotec.com/product/in-line-blower-fans/>

<https://revotec.com/product/in-line-blower-fans/>I don't know if there is
enough room, but you may be able to run one hose to the cold air box and
the other hose underneath to the float bowls. You'll have to mock this up
to see if it could work. I'm thinking that the steering shaft may be in the
way.

Alternatively mount the blower motor lower and bring a second hose up from
below. I can't access my car right now so I don't even know if there is
room.

Curt

On Sat, Jul 5, 2025 at 10:25 AM KENNETH FLEMNG <ahmg at aol.com> wrote:

> This solution was definitely going to be the one that I was looking for .
> I really got to excited to early , as I have a 100 Lemans car and cold air
> box prevents usage of this method .
> Any suggestions, without the option of buying a stock 100? Though that may
> be a good excuse for another 100 in the stable. Atleast what I could tell
> my wife , but she really would not buy that much to smart I have to say and
> heard all tricks before.
> Thanks in advance guys!
>
> Ken Fleming
>
> On Jul 4, 2025, at 3:51 PM, Curtis Arndt <cnaarndt at gmail.com> wrote:
>
> 
> Ken,ac
>
> Here's the design and setup that I did for the BN1/2 float bowl cooling
> fan. It's been installed by both Geoff Chrysler and BN1 owner, British
> expat Simon Griffin of Illinois. Simon told me that the results have been
> absolutely fantastic, no more vapor lock, or fuel boiling in the float
> bowls.
>
> Here the blog article from Geoff Chrysler [Rightway Heritage Trimming] on
> his installation, #10 Install a Carburetor Cooling Fan...
> BN1: Winter Maintenance & Improvements, - A DETAIL ENTHUSIAST
> <http://www.detailenthusiast.ca/blog/bn1-winter-maintenance-improvements>
>
> Here's the video Geoff did on his installation, *"Install a Cooling Fan"*
> at minute 38:47 to 45:22...
> BN1 Winter maintenance <https://www.youtube.com/watch?v=qotWXYorlfM>
>
> There are three photos of my original setup without the inline cooling fan
> on my Instagram site - 1955healey100...
> (4) Instagram <https://www.instagram.com/p/Ch60RWrODCt/>
> (4) Instagram <https://www.instagram.com/p/Ch60OjPO6H1/>
> (4) Instagram <https://www.instagram.com/p/Ch6zNtEOEfD/>
>
> I ordered my *Revotec* 4" inline cooling fan from these folks in
> England...
> Buy Revotec Alloy In-Line Blower Fans | Demon Tweeks
> <https://www.demon-tweeks.com/us/revotec-alloy-in-line-blower-fans-991144/>
>
> These fans are high quality, UK made and are specific for performance or
> vintage automobiles. They are under $150 USD delivered to California.  I
> was going to wire the fan to my light panel under my dash with a toggle
> switch, however Geoff came up with a simple and elegant
> alternative... power is easily supplied as Geoff describes from the
> available side light connector just requiring a plug in to the side light
> connector and a ground..
>
> The 4" to 2-1/2" plastic adapter was ordered from Amazon, *"Powertec" *for
> $8.99...
> POWERTEC 70136 4" to 2-1/2" Cone Reducer, Dust Collection Fittings for
> Dust Collection Hose to Hose Connection - Amazon.com
> <https://www.amazon.com/POWERTEC-70136-4-Inch-2-Inch-Reducer/dp/B002DSDSY2/ref=sr_1_4?crid=5M60LPPWEIHH&dib=eyJ2IjoiMSJ9.lBH972M851RE6txRsBmWCnYB3z3HAvMeWL79TWm_yDe2xr2c-0HWwcPSYzyz1MtcqWQNceW86pggeDOsPRPbeRiFjUB46-vIOlCiFtF2qoJ40Zs__To9UWaYdfUNLT0kicCfGt-ZASl28Etw7-cMLbLZ6q7Y9eITrBghxhH1jowvhyxA6T-g1ZbSMS5-wBnj4X0GJvAbJAmoDqgGCEznzApES3HVxX_AYDi-3VnzidBsvD_b-ipNlwKga2l9Oq3PaTgWKnEzHkB5OUPWHuyB15Em5iIKJMcxuuHpfIdhI9E.-qDlA33CQ5f3no8To7vW_irH4EmUu2dw4W_BagUBG-o&dib_tag=se&keywords=4%22%2Bto%2B2-1%2F2%22%2Bplastic%2Bhose%2Badapter&qid=1751656574&sprefix=4%2Bto%2B2-1%2F2%2Bplastic%2Bhose%2Badapter%2Caps%2C159&sr=8-4&th=1>
>
> Basic HS physics/Bernoulli, reducing the diameter from 4" to 2-1/2"
> increases the speed of the air, plus the adapter makes mounting a lot
> easier. It can all be removed in minutes.
>
> The hose was a quality OEM style, 100M cold air box, sturdy fabric type
> from AH Spares...
> Intake Hose - Cold Air Box
> <https://www.ahspares.co.uk/austin-healey/performance-parts/fuel-engine-bay/intake-hose-cold-air-box.aspx?srsltid=afmboooedzgi4c2twlkfnjavdtvcki1r5zzgyxmlrofx1ugd92jxqims>
>
> Let me know what you think. I was going to supply, market and sell these
> as a kit, but I'd most likely lose money on the project. They are easy
> enough to build on your own.
>
> Cheers,
>
> Curt
> AHCSD, AHCUSA, AHCA
> AH Concours Registry
>
>
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