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<DIV>I have a BN1, so things are a bit different, but temps under the bonnet get
way up there and my front float bowl is directly over my exhaust without a heat
shield. In the past, my car would vapor lock like crazy, the fuel in the front
float bowl boiling away. I was a member of the SoCal Healey club then and a few
of us were having the same problem. Nothing seemed to work. And then George
McHarris came up with the solution. And I followed suit and haven't had the
problem since.</DIV>
<DIV> What we did was mount a marine bilge fan along
side the upper end of our radiators. Being it's a DC motor, just wire it so the
air flows in the correct direction and add some 4" flex to both ends. One end
goes to right behind your grill to suck in the cooler air and the other end
off the fan goes to right in front of your carbs. Mine is aimed directly at the
front float bowl. Did this almost ten years ago now and have had zero problems
since with vapor lock. I can sit in traffic and get to 212 and the car still
idles just fine.</DIV>
<DIV> I put the fan in place with zip ties, so didn't
have to drill any holes and everything can come out in a matter of minutes if
necessary. Got the fan on eBay under thirty dollars and since it was white, I
painted it with flat black paint. Works like a charm and don't see any reason
why this couldn't be done in a BJ8 engine bay with some minor tweaking of
positions of the fan.</DIV>
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<DIV> </DIV>
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<DIV id=role_caption style="FONT-SIZE: 12pt; FONT-FAMILY: Verdana">First temporary
installation, wired in place. Blows air right on front float
bowl.</DIV></TD></TR></TBODY></TABLE></TD></TR>
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<DIV id=role_caption style="FONT-SIZE: 12pt; FONT-FAMILY: Verdana">Switch on shelf to
turn on and off when needed.
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<DIV>In a message dated 9/4/2017 10:09:46 A.M. Pacific Daylight Time,
roggrace@telus.net writes:</DIV>
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<DIV>My BJ8 seems to perform better with the increased O2 of lower</DIV>
<DIV>ambient temps in the evenings and mornings. There even seem to be fewer
</DIV>
<DIV>rattles squeaks and groans too !</DIV>
<DIV>I have an oil cooler, electric rad. fan oil temp gauge and standard
rad.</DIV>
<DIV>Whenever I spend more than say 20 mins in traffic after the engine oil
is</DIV>
<DIV>already up to temp, the idling is impacted due to what must be due to
</DIV>
<DIV>increased engine compartment air temp, and the HD8 mixture becoming too
rich for that</DIV>
<DIV>ambient.</DIV>
<DIV>So I decided to do some crude testing, and installed a temp. pick up
near</DIV>
<DIV>the rear carb intake.</DIV>
<DIV> </DIV>
<DIV>In an ambient of around 85F and sustained cruising at around 60 MPH –
elec.</DIV>
<DIV>rad fan off</DIV>
<DIV>Water is 190F</DIV>
<DIV>Oil is 165- 170F</DIV>
<DIV>Engine compartment is around 130F</DIV>
<DIV> </DIV>
<DIV>At same ambient and elec. fan now on and after 25 mins idling in
traffic</DIV>
<DIV>Water is 200F</DIV>
<DIV>Oil is 180 F</DIV>
<DIV>Engine compartment is over 155F and idling has to be nursed to
avoid</DIV>
<DIV>stalling. This must be a build up of exhaust heat with no exit
path.</DIV>
<DIV> </DIV>
<DIV>Have tried to compromise with mixture settings but not yet found a sweet
</DIV>
<DIV>spot.</DIV>
<DIV>So l was wondering if anyone has tried to improve engine compartment
venting </DIV>
<DIV>and how ?</DIV>
<DIV>Assume this why some cars have louvers on hood or side of car.</DIV>
<DIV>Ideas comments welcome.</DIV>
<DIV> </DIV>
<DIV>On a similar thread has anyone used the cold vent air to bring cooler air
to </DIV>
<DIV>the carb intake area when cruising ? Results ?</DIV>
<DIV> </DIV>
<DIV>rg
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