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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">I am also fortunate in never having had iss=
ues with fuel percolation or vapor locking even before the recent rebuild an=
d addition of air intake ducting.<div><br></div><div>I have a DE tubular exh=
aust system to compliment the AL head and perhaps this combo is less apt to r=
adiate heat up to the carbs.</div><div><br></div><div>In any case yours is a=
good point and a bigger/better heat shield would be an easy thing to fabric=
ate.</div><div><br></div><div>Every little bit helps=E2=80=A6.</div><div><br=
><div><div dir=3D"ltr">Best=E2=80=94Michael Oritt<div><br></div></div><div d=
ir=3D"ltr"><br><blockquote type=3D"cite">On Jul 6, 2025, at 7:44=E2=80=AFPM,=
B coxon <morevert@gmail.com> wrote:<br><br></blockquote></div><blockq=
uote type=3D"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"ltr">Maybe I'm a lu=
cky 100-4 owner, but I have never had Vapor Lock issues. I definitely don't d=
rive 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 wi=
de 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 d=
ate.I know others have made similar comments on the Healey forums.</div><br>=
<div class=3D"gmail_quote gmail_quote_container"><div dir=3D"ltr" class=3D"g=
mail_attr">On Fri, Jul 4, 2025 at 12:51=E2=80=AFPM Curtis Arndt <<a href=3D=
"mailto:cnaarndt@gmail.com";>cnaarndt@gmail.com</a>> wrote:<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1=
px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div dir=3D"ltr=
"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr"><div d=
ir=3D"ltr"><div dir=3D"ltr"><div dir=3D"ltr">Ken,ac<div><br></div><div>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 Gr=
iffin of Illinois. Simon told me that the results have been absolutely fanta=
stic, no more vapor lock, or fuel boiling in the float bowls.</div><div><br>=
</div><div>Here the blog article from Geoff Chrysler [Rightway Heritage Trim=
ming] on his installation, #10 Install a Carburetor Cooling Fan...</div><div=
><a href=3D"http://www.detailenthusiast.ca/blog/bn1-winter-maintenance-impro=
vements" target=3D"_blank">BN1: Winter Maintenance & Improvements, - A D=
ETAIL ENTHUSIAST</a></div><div><br></div><div>Here's the video Geoff did on h=
is installation, <b>"Install a Cooling Fan"</b> at minute 38:47 to 45:22...<=
/div><div><a href=3D"https://www.youtube.com/watch?v=3DqotWXYorlfM"; target=3D=
"_blank">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 s=
ite - 1955healey100...</div><div><a href=3D"https://www.instagram.com/p/Ch60=
RWrODCt/" target=3D"_blank">(4) Instagram</a></div><div><a href=3D"https://w=
ww.instagram.com/p/Ch60OjPO6H1/" target=3D"_blank">(4) Instagram</a></div><d=
iv><a href=3D"https://www.instagram.com/p/Ch6zNtEOEfD/"; target=3D"_blank">(4=
) Instagram</a></div><div><br></div><div>I ordered my <b>Revotec</b> 4" inli=
ne cooling fan from these folks in England...</div><div><a href=3D"https://w=
ww.demon-tweeks.com/us/revotec-alloy-in-line-blower-fans-991144/" target=3D"=
_blank">Buy Revotec Alloy In-Line Blower Fans | Demon Tweeks</a></div><div><=
br></div><div>These fans are high quality, UK made and are specific for perf=
ormance or vintage automobiles. They are under $150 USD delivered to Califor=
nia. I was going to wire the fan to my light panel under my dash w=
ith a toggle switch, however Geoff came up with a simple and elegant alterna=
tive... power is easily supplied as Geoff describes from the available&=
nbsp;side light connector just requiring a plug in to the side light connect=
or and a ground..</div><div><br></div><div>The 4" to 2-1/2" plastic ada=
pter was ordered from Amazon, <b>"Powertec" </b>for $8.99...</div><div><a hr=
ef=3D"https://www.amazon.com/POWERTEC-70136-4-Inch-2-Inch-Reducer/dp/B002DSD=
SY2/ref=3Dsr_1_4?crid=3D5M60LPPWEIHH&dib=3DeyJ2IjoiMSJ9.lBH972M851RE6txR=
sBmWCnYB3z3HAvMeWL79TWm_yDe2xr2c-0HWwcPSYzyz1MtcqWQNceW86pggeDOsPRPbeRiFjUB4=
6-vIOlCiFtF2qoJ40Zs__To9UWaYdfUNLT0kicCfGt-ZASl28Etw7-cMLbLZ6q7Y9eITrBghxhH1=
jowvhyxA6T-g1ZbSMS5-wBnj4X0GJvAbJAmoDqgGCEznzApES3HVxX_AYDi-3VnzidBsvD_b-ipN=
lwKga2l9Oq3PaTgWKnEzHkB5OUPWHuyB15Em5iIKJMcxuuHpfIdhI9E.-qDlA33CQ5f3no8To7vW=
_irH4EmUu2dw4W_BagUBG-o&dib_tag=3Dse&keywords=3D4%22%2Bto%2B2-1%2F2%=
22%2Bplastic%2Bhose%2Badapter&qid=3D1751656574&sprefix=3D4%2Bto%2B2-=
1%2F2%2Bplastic%2Bhose%2Badapter%2Caps%2C159&sr=3D8-4&th=3D1" target=
=3D"_blank">POWERTEC 70136 4" to 2-1/2" Cone Reducer, Dust Collection Fittin=
gs for Dust Collection Hose to Hose Connection - Amazon.com</a> <=
/div><div>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.</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.ahspares.co.uk/austin-healey/per=
formance-parts/fuel-engine-bay/intake-hose-cold-air-box.aspx?srsltid=3Dafmbo=
ooedzgi4c2twlkfnjavdtvcki1r5zzgyxmlrofx1ugd92jxqims" target=3D"_blank">Intak=
e Hose - Cold Air Box</a></div><div><br></div><div>Let me know what you thin=
k. I was going to supply, market and sell these as a kit, but I'd most likel=
y lose money on the project. They are easy enough to build on your own.</div=
><div><br></div><div>Cheers,</div><div><br></div><div>Curt</div><div>AHCSD, A=
HCUSA, AHCA</div><div>AH Concours Registry</div><div><br></div></div></div><=
/div></div></div></div></div></div></div>
</blockquote></div>
</div></blockquote></div></div></body></html>=
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