[Healeys] AH BN1/2 Float Bowl Cooling Fan

Mon Jul 7 14:29:43 MDT 2025

Many years ago I solved my vapor lock issues on my 100 by wrapping some
heat tape around the tail pipe that passes under the fuel pump.  That works
well.

A more elegant (but more costly) solution is to jet hot coat the headers,
which does wonders to push heat out the back of the car.

On Mon, Jul 7, 2025 at 12:41 PM Bob Spidell via Healeys <
healeys at autox.team.net> wrote:

> Speaking of heat shields, AHS has one for the 100M (how the M's linkage
> varies from a std. BN2's I don't know). I have one, and plan to install it,
> along with Michael Salter's PCV kit as soon as I get a round tuit.
>
>
> https://www.ahspares.co.uk/austin-healey/performance-parts/fuel-engine-bay/heatshield-aluminium-100m-spec.aspx
>
> bs
>
> On 7/7/2025 7:21 AM, Michael Oritt wrote:
>
> I am also fortunate in never having had issues with fuel percolation or
> vapor locking even before the recent rebuild and addition of air intake
> ducting.
>
> I have a DE tubular exhaust system to compliment the AL head and perhaps
> this combo is less apt to radiate heat up to the carbs.
>
> In any case yours is a good point and a bigger/better heat shield would be
> an easy thing to fabricate.
>
> Every little bit helps….
>
> Best—Michael Oritt
>
>
> On Jul 6, 2025, at 7:44 PM, B coxon <morevert at gmail.com>
> <morevert at gmail.com> wrote:
>
> 
> Maybe I'm a lucky 100-4 owner, but I have never had Vapor Lock issues. I
> definitely don't drive it as much as some of you or in as hot conditions.
> I'm sure some of you have thought why don't 6 cyl. Healey's typically get
> Vapor Lock? The engine compartment in a 6 cyl. Healey is typically much
> hotter than a more wide open 100-4 engine compartment. What's the main
> difference in setups. It's a much more robust Heat Shield. After Concours I
> switched my 100-4 to have a large Heat Shield & Headers. Never a Vapor Lock
> problem to date.I know others have made similar comments on the Healey
> forums.
>
> On Fri, Jul 4, 2025 at 12:51 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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