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Hi All ,=20
I have a 67 BJ-8 . And when I did a frame off restoration I lived in Ma=
ss. Well me and my Healey are now living in central Florida. And my mods ar=
e a set of headers from Dennis Welch along with his matching 2 inch exhaust s=
ystem. I had the headers ceramic coated and I wrapped them with header insul=
ation tape . I completely used fuel line insulation wrap from mid way on the=
car all the way up to the carbs . I installed a neat set of fuel bowl insul=
ated coozies from Joe Coutu. Along with a new radiator from AH Spares and a e=
lectronic fan mounted to it . My next mod was a new intake manifold , also f=
rom AH Spares , there newly designed system with round 2 inch ports . I also=
had this ceramic coated . I still install the original Healey heat shield .=
I installed an electronic ignition system and a new SU electronic fuel pump=
.=20
Well running around Florida it runs strong . But every time I come to a=
stop light , then pull away I always have vapor lock problems. Stopping at a=
stop light I get no air flow around the carbs . Looking back installing tho=
se fender rally vents I=E2=80=99m sure would help getting rid of some of the=
engine heat . None of these mods have stopped my vapor lock problems. My n=
ext attempt at solving the fuel vapor problem is I just insalled a cooling f=
an from Chill Out , a company that specializes in race car cooling systems. I=
t=E2=80=99s a 3 inch fan about the size of a beer can . I mounted it next to=
my brake reservoir with ducting on the intake side pulling in air from in f=
ront of the radiator, then duct work on the output side blowing onto the car=
bs . Unfortunately I ran out of time to test it as I=E2=80=99m now back in M=
ass for 3 weeks. When I get back to Florida I=E2=80=99m looking forward to =F0=
=9F=A4=9E seeing if this helps . I can supply pictures of all the above mods=
if anyone is interested.=20
Wish me Luck =F0=9F=91=8D=F0=9F=8F=BB Don
Sent from my iPhone
> On May 6, 2021, at 10:03 AM, Alan Seigrist <healey.nut@gmail.com> wrote:
>=20
> =EF=BB=BF
> I have found that having the header and miniature heat shield to be cerami=
c coated makes a huge difference in the engine bay but then transfers heat t=
o the exhaust, so it=E2=80=99s only good if you have an SS exhaust system an=
d then you need to insulate around the pump as Michael has said. i just wra=
p header tape around the exhaust pipe in that area and that is also effectiv=
e,
>=20
>> On Thu, 6 May 2021 at 9:52 PM, Michael Salter <michaelsalter@gmail.com> w=
rote:
>> Hi Ken, yes I think everyone with a 100 has encountered fuel delivery iss=
ues with modern fuels. Methanol lowers the boiling point of petrol to a poin=
t where it becomes a problem.=20
>> With the 100 there are 2 distinct issues.=20
>>=20
>> Firstly, because the fuel pump and its associated lines are directly abov=
e the exhaust pipe, hot air heats them. The fuel in the suction side of the p=
ump has, effectively, a lower boiling point than it would at atmospheric pre=
ssure. This fuel tends to boil if there isn't sufficient air circulation to k=
eep the pump and lines cooled, as occurs while stopped in traffic on a hot d=
ay. True vapor lock occurs because the pump will not pump sufficient volume=
of vapour to exceed the rate of its production by the boiling process.
>>=20
>> Secondly the carburetor float chambers and the small fuel passage to the j=
et are very close to the exhaust manifold.=20
>> The manifold radiates lots of heat which heats them. Again when the car i=
s moving at a reasonable pace the incoming air through the grille and around=
the radiator is sufficient to maintain the carburetor at a low enough tempe=
rature to prohibit boiling but, again when stopped in traffic this doesn't h=
appen.
>>=20
>> I have managed to eliminate the first problem by installing a insulating s=
leeve from a modern car's AC hose over the fuel line from the tank to the pu=
mp.
>>=20
>> For the second I have made small heatshields from 24 gauge galvanized ste=
el to shield as much as possible of the carburetors from the radiated heat. T=
his has helped considerably but not completely eliminated the problem.=20
>>=20
>> For the most part neither of these modifications are visible and I have f=
ound that fuel delivery issues, although not completely eliminated, are mana=
geable.=20
>> I am considering installing a small blower and duct sourcing air from beh=
ind the grille to see how much difference that makes but if course that will=
be visible.
>> Hope that helps, others may have found better solutions.=20
>>=20
>> M
>>=20
>>=20
>>> On Mon., May 3, 2021, 2:58 p.m. Ken Fleming, <ahmg@aol.com> wrote:
>>> Michael , I thought you maybe have experience this ans have a solution .=
On my Bn1 which is M spec with carbs, advance distributed, LeMans Cam and P=
istons has always suffered from what I call vapor lock of gas. Especially in=
hot weather .=20
>>> I am assuming the heat is from
>>> Manifold and it placement near carbs or fuel pump/ battery near exhaust p=
lay a role but I could be wrong . I have asked other owners and they seem mo=
st of them not to have same problem. I do have a heat sheild added with litt=
le result.
>>> I am at a loss as to
>>> What to do
>>> Next , but have you experienced this and have any suggestions. Are my as=
sumptions
>>> Correct on heat causing the issue. Could today=E2=80=99s quality if gas=
be a issue?
>>> I recall reading this was a common issue for 100=E2=80=99s to have vapor=
issues.=20
>>> Ken
>>>=20
>>> Sent from my iPhone
>> _______________________________________________
>> Support Team.Net http://www.team.net/donate.html
>> Suggested annual donation $12.75
>>=20
>> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/arch=
ive
>>=20
>> Healeys@autox.team.net
>> http://autox.team.net/mailman/listinfo/healeys
>>=20
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/healey.=
nut@gmail.com
>>=20
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>=20
> Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archi=
ve
>=20
> Healeys@autox.team.net
> http://autox.team.net/mailman/listinfo/healeys
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/fsufan19=
52@yahoo.com
>=20
--Apple-Mail-D5011018-B5E9-4DC7-914E-1F447138F6B9
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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">Hi All , <div> I have a 6=
7 BJ-8 . And when I did a frame off restoration I lived in Mass.  =
;Well me and my Healey are now living in central Florida. And my mods are a s=
et of headers from Dennis Welch along with his matching 2 inch exhaust syste=
m. I had the headers ceramic coated and I wrapped them with header insulatio=
n tape . I completely used fuel line insulation wrap from mid way on the car=
all the way up to the carbs . I installed a neat set of fuel bowl insulated=
coozies from Joe Coutu. Along with a new radiator from AH Spares and a elec=
tronic fan mounted to it . My next mod was a new intake manifold , also from=
AH Spares , there newly designed system with round 2 inch ports . I also ha=
d this ceramic coated . I still install the original Healey heat shield . I i=
nstalled an electronic ignition system and a new SU electronic fuel pump .&n=
bsp;</div><div> Well running around Florida it runs stron=
g . But every time I come to a stop light , then pull away I always have vap=
or lock problems. Stopping at a stop light I get no air flow around the carb=
s . Looking back installing those fender rally vents I=E2=80=99m sure would h=
elp getting rid of some of the engine heat . None of these mods have stopped=
my vapor lock problems. My next attempt at solving the fuel vapor pro=
blem is I just insalled a cooling fan from Chill Out , a company that specia=
lizes in race car cooling systems. It=E2=80=99s a 3 inch fan about the size o=
f a beer can . I mounted it next to my brake reservoir with ducting on the i=
ntake side pulling in air from in front of the radiator, then duct work on t=
he output side blowing onto the carbs . Unfortunately I ran out of tim=
e to test it as I=E2=80=99m now back in Mass for 3 weeks. When I get b=
ack to Florida I=E2=80=99m looking forward to =F0=9F=A4=9E seeing if this he=
lps . I can supply pictures of all the above mods if anyone is interested.&n=
bsp;</div><div> Wish me Luck =F0=9F=91=8D=F0=9F=8F=BB Do=
n</div><div><br><div dir=3D"ltr">Sent from my iPhone</div><div dir=3D"ltr"><=
br><blockquote type=3D"cite">On May 6, 2021, at 10:03 AM, Alan Seigrist <=
healey.nut@gmail.com> wrote:<br><br></blockquote></div><blockquote type=3D=
"cite"><div dir=3D"ltr">=EF=BB=BF<div dir=3D"auto">I have found that having t=
he header and miniature heat shield to be ceramic coated makes a huge differ=
ence in the engine bay but then transfers heat to the exhaust, so it=E2=80=99=
s only good if you have an SS exhaust system and then you need to insulate a=
round the pump as Michael has said. i just wrap header tape around the=
exhaust pipe in that area and that is also effective,</div><div><br><div cl=
ass=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, 6 May 2021=
at 9:52 PM, Michael Salter <<a href=3D"mailto:michaelsalter@gmail.com";>m=
ichaelsalter@gmail.com</a>> wrote:<br></div><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"=
><div dir=3D"auto">Hi Ken, yes I think everyone with a 100 has encountered f=
uel delivery issues with modern fuels. Methanol lowers the boiling point of p=
etrol to a point where it becomes a problem. <div dir=3D"auto">With the=
100 there are 2 distinct issues. </div><div dir=3D"auto"><br></div><di=
v dir=3D"auto">Firstly, because the fuel pump and its associated lines are d=
irectly above the exhaust pipe, hot air heats them. The fuel in the suction s=
ide of the pump has, effectively, a lower boiling point than it would at atm=
ospheric pressure. This fuel tends to boil if there isn't sufficient air cir=
culation to keep the pump and lines cooled, as occurs while stopped in traff=
ic on a hot day. True vapor lock occurs because the pump will not pump =
sufficient volume of vapour to exceed the rate of its production by the boi=
ling process.</div><div dir=3D"auto"><br></div><div dir=3D"auto">Secondly th=
e carburetor float chambers and the small fuel passage to the jet are very c=
lose to the exhaust manifold. </div><div dir=3D"auto">The manifold radi=
ates lots of heat which heats them. Again when the car is moving at a reason=
able pace the incoming air through the grille and around the radiator is suf=
ficient to maintain the carburetor at a low enough temperature to prohibit b=
oiling but, again when stopped in traffic this doesn't happen.</div><div dir=
=3D"auto"><br></div><div dir=3D"auto">I have managed to eliminate the first p=
roblem by installing a insulating sleeve from a modern car's AC hose over th=
e fuel line from the tank to the pump.</div><div dir=3D"auto"><br></div><div=
dir=3D"auto">For the second I have made small heatshields from 24 gauge gal=
vanized steel to shield as much as possible of the carburetors from the radi=
ated heat. This has helped considerably but not completely eliminated the pr=
oblem. </div><div dir=3D"auto"><br></div><div dir=3D"auto">For the most=
part neither of these modifications are visible and I have found that fuel d=
elivery issues, although not completely eliminated, are manageable. </d=
iv><div dir=3D"auto">I am considering installing a small blower and duct sou=
rcing air from behind the grille to see how much difference that makes but i=
f course that will be visible.</div><div dir=3D"auto">Hope that helps, other=
s may have found better solutions. </div><div dir=3D"auto"><br></div><d=
iv dir=3D"auto">M</div><div dir=3D"auto"><br></div></div><br><div class=3D"g=
mail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon., May 3, 2021, 2:58=
p.m. Ken Fleming, <<a href=3D"mailto:ahmg@aol.com"; target=3D"_blank">ahm=
g@aol.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D=
"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Michael , I t=
hought you maybe have experience this ans have a solution . On my Bn1 which i=
s M spec with carbs, advance distributed, LeMans Cam and Pistons has always s=
uffered from what I call vapor lock of gas. Especially in hot weather . <br>=
I am assuming the heat is from<br>
Manifold and it placement near carbs or fuel pump/ battery near exhaust play=
a role but I could be wrong . I have asked other owners and they seem most o=
f them not to have same problem. I do have a heat sheild added with little r=
esult.<br>
I am at a loss as to<br>
What to do<br>
Next , but have you experienced this and have any suggestions. Are my assump=
tions<br>
Correct on heat causing the issue. Could today=E2=80=99s quality if ga=
s be a issue?<br>
I recall reading this was a common issue for 100=E2=80=99s to have vapor iss=
ues. <br>
Ken<br>
<br>
Sent from my iPhone<br>
</blockquote></div>
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