[Healeys] AH BN1/2 Float Bowl Cooling Fan

[Bob Spidell]

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> 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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