[Healeys] AH BN1/2 Float Bowl Cooling Fan

[Michael Salter]

Looks somewhat familar 😊😊😊
Installed mine about 4 years ago. Works very well.
Also fitted baffles from the grille to the sides of the radiator which made an immense difference.

M


________________________________
From: Curtis Arndt <cnaarndt at gmail.com>
Sent: Friday, July 4, 2025 3:51:27 PM
To: Ken Fleming <AHMG at aol.com>; Michael Salter <michael.salter at gmail.com>
Cc: peter Greatbatch <plgreat at hotmail.com>; Roland Wilhelmy <sentenac.rw at gmail.com>; terry at toyshop.com <terry at toyshop.com>; Terry Hall <spndaddy at outlook.com>; Lou G <lgalper1 at cox.net>; AHCSD-Discuss at yahoogroups.com <AHCSD-Discuss at yahoogroups.com>; Healey List <healeys at autox.team.net>; Alan Seigrist <healey.nut at gmail.com>; Randy Hicks <randyhicks at me.com>; George Baxter <gjbaxter63 at gmail.com>; Jim Smalley <jimsmalley at comcast.net>; Lynn Martin <foreverhealeys at frontier.com>; Reid Trummel <reid.trummel at gmail.com>; Michael Oritt <michael.oritt at gmail.com>; Guy Coldwell <guido36 at me.com>; H.-J. Wünsche <jw at unibw.de>; jacques.vandeveldejva at gmail.co <jacques.vandeveldejva at gmail.co>; B coxon <morevert at gmail.com>; taylor edwards <gtclassicautos at gmail.com>; Nicolas Dourassoff <ndourassoff at intelepeer.com>
Subject: AH BN1/2 Float Bowl Cooling Fan

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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