Subject: [Healeys] AH BN1/2 Float Bowl Cooling Fan

From: Curtis Arndt <[email-masked]>
Date: Fri, 4 Jul 2025 12:51:27 -0700

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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=3DqotWXYorlfM>

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=3Dsr_1_4?crid=3D5M60LPPWEIHH&dib=3DeyJ2IjoiMSJ9.lBH972M851RE6txRsBmWCnY=
B3z3HAvMeWL79TWm_yDe2xr2c-0HWwcPSYzyz1MtcqWQNceW86pggeDOsPRPbeRiFjUB46-vIOl=
CiFtF2qoJ40Zs__To9UWaYdfUNLT0kicCfGt-ZASl28Etw7-cMLbLZ6q7Y9eITrBghxhH1jowvh=
yxA6T-g1ZbSMS5-wBnj4X0GJvAbJAmoDqgGCEznzApES3HVxX_AYDi-3VnzidBsvD_b-ipNlwKg=
a2l9Oq3PaTgWKnEzHkB5OUPWHuyB15Em5iIKJMcxuuHpfIdhI9E.-qDlA33CQ5f3no8To7vW_ir=
H4EmUu2dw4W_BagUBG-o&dib_tag=3Dse&keywords=3D4%22%2Bto%2B2-1%2F2%22%2Bplast=
ic%2Bhose%2Badapter&qid=3D1751656574&sprefix=3D4%2Bto%2B2-1%2F2%2Bplastic%2=
Bhose%2Badapter%2Caps%2C159&sr=3D8-4&th=3D1>

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=3Dafmboooedzgi4c2twlkfnjavdtvcki1r5z=
zgyxmlrofx1ugd92jxqims>

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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<div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div di=
r=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"lt=
r">Ken,ac<div><br></div><div>Here&#39;s the design and setup that I did for=
 the BN1/2 float bowl cooling fan. It&#39;s been installed by both Geoff Ch=
rysler and BN1 owner, British expat Simon Griffin of Illinois. Simon told m=
e that the results have been absolutely fantastic, no more vapor lock, or f=
uel boiling in the float bowls.</div><div><br></div><div>Here the blog arti=
cle from Geoff Chrysler [Rightway Heritage Trimming] on his installation, #=
10 Install a Carburetor Cooling Fan...</div><div><a href=3D"http://www.deta=
ilenthusiast.ca/blog/bn1-winter-maintenance-improvements">BN1: Winter Maint=
enance &amp; Improvements, - A DETAIL ENTHUSIAST</a></div><div><br></div><d=
iv>Here&#39;s the video Geoff did on his installation, <b>&quot;Install a C=
ooling Fan&quot;</b> at minute 38:47 to 45:22...</div><div><a href=3D"https=
://www.youtube.com/watch?v=3DqotWXYorlfM">BN1 Winter maintenance</a></div><=
div><br></div><div>There are three photos of my original setup without the =
inline cooling fan on my Instagram site - 1955healey100...</div><div><a hre=
f=3D"https://www.instagram.com/p/Ch60RWrODCt/">(4) Instagram</a></div><div>=
<a href=3D"https://www.instagram.com/p/Ch60OjPO6H1/">(4) Instagram</a></div=
><div><a href=3D"https://www.instagram.com/p/Ch6zNtEOEfD/">(4) Instagram</a=
></div><div><br></div><div>I ordered my <b>Revotec</b> 4&quot; inline cooli=
ng fan from these folks in England...</div><div><a href=3D"https://www.demo=
n-tweeks.com/us/revotec-alloy-in-line-blower-fans-991144/">Buy Revotec Allo=
y In-Line Blower Fans | Demon Tweeks</a></div><div><br></div><div>These fan=
s are high quality, UK made and are specific for performance or vintage aut=
omobiles. They are under $150 USD delivered to California.=C2=A0 I was=C2=
=A0going to wire the fan to my light panel under my dash with a toggle swit=
ch, however Geoff came up with a simple and elegant alternative...=C2=A0pow=
er is easily supplied as Geoff describes from the available=C2=A0side light=
 connector just requiring a plug in to the side light connector and a groun=
d..</div><div><br></div><div>The=C2=A04&quot; to 2-1/2&quot; plastic adapte=
r was ordered from Amazon, <b>&quot;Powertec&quot; </b>for $8.99...</div><d=
iv><a href=3D"https://www.amazon.com/POWERTEC-70136-4-Inch-2-Inch-Reducer/d=
p/B002DSDSY2/ref=3Dsr_1_4?crid=3D5M60LPPWEIHH&amp;dib=3DeyJ2IjoiMSJ9.lBH972=
M851RE6txRsBmWCnYB3z3HAvMeWL79TWm_yDe2xr2c-0HWwcPSYzyz1MtcqWQNceW86pggeDOsP=
RPbeRiFjUB46-vIOlCiFtF2qoJ40Zs__To9UWaYdfUNLT0kicCfGt-ZASl28Etw7-cMLbLZ6q7Y=
9eITrBghxhH1jowvhyxA6T-g1ZbSMS5-wBnj4X0GJvAbJAmoDqgGCEznzApES3HVxX_AYDi-3Vn=
zidBsvD_b-ipNlwKga2l9Oq3PaTgWKnEzHkB5OUPWHuyB15Em5iIKJMcxuuHpfIdhI9E.-qDlA3=
3CQ5f3no8To7vW_irH4EmUu2dw4W_BagUBG-o&amp;dib_tag=3Dse&amp;keywords=3D4%22%=
2Bto%2B2-1%2F2%22%2Bplastic%2Bhose%2Badapter&amp;qid=3D1751656574&amp;spref=
ix=3D4%2Bto%2B2-1%2F2%2Bplastic%2Bhose%2Badapter%2Caps%2C159&amp;sr=3D8-4&a=
mp;th=3D1">POWERTEC 70136 4&quot; to 2-1/2&quot; Cone Reducer, Dust Collect=
ion Fittings for Dust Collection Hose to Hose Connection - Amazon.com</a>=
=C2=A0=C2=A0</div><div>Basic HS physics/Bernoulli, reducing the diameter fr=
om 4&quot; to 2-1/2&quot; increases the speed of the air, plus the adapter=
=C2=A0makes mounting=C2=A0a lot easier. It can all be removed in minutes.</=
div><div><br></div><div>The hose was a quality OEM style, 100M cold air box=
, sturdy fabric type from AH Spares...</div><div><a href=3D"https://www.ahs=
pares.co.uk/austin-healey/performance-parts/fuel-engine-bay/intake-hose-col=
d-air-box.aspx?srsltid=3Dafmboooedzgi4c2twlkfnjavdtvcki1r5zzgyxmlrofx1ugd92=
jxqims">Intake Hose - Cold Air Box</a></div><div><br></div><div>Let me know=
 what you think. I was going to supply, market and sell these as a kit, but=
 I&#39;d most likely lose money on the project. They are easy enough to bui=
ld on your own.</div><div><br></div><div>Cheers,</div><div><br></div><div>C=
urt</div><div>AHCSD, AHCUSA, AHCA</div><div>AH Concours Registry</div><div>=
<br></div></div></div></div></div></div></div></div></div></div>

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