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<DIV>Yes, in day to day driving the heated intake manifold helps to keep fuel
droplets in a vapor state. Obviously in colder weather this is even more
practical. This can both increase mileage and improve emissions. However,
it would seem to not help keep the intake cooler (as in the mentioned south)
unless the ambient outside air temperature was over 180+ degrees! Some engines
simply use the intake manifold as a “crossover” passage between the cylinder
heads for coolant flow to balance the heat in the engine. A lot of engines
also run exhaust gases under the center of the intake (under the carburetor) for
the same purpose. These are basic statements about a engines in general
regarding a heated intake manifold and not the small block Ford in
particular.</DIV>
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<DIV> Your intake manifold is likely an “air gap” style. While a
heated intake is practical for reasons stated above..., it is not the best
design for outright performance. A cooler intake condenses the air and puts more
of it into the engine, thus increasing performance. The air gap design isolates
the intake runners from any coolant, exhaust cross over gasses and even the heat
from oil under the intake manifold in most “V” style engines. If you are
noticing no difference be thankful. You have likely gained some performance
advantage without suffering the corresponding problems that can potential
arise.</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=tigers@autox.team.net
href="mailto:tigers@autox.team.net">CoolVT--- via Tigers</A> </DIV>
<DIV><B>Sent:</B> Wednesday, March 01, 2017 6:33 AM</DIV>
<DIV><B>To:</B> <A title=tigers@autox.team.net
href="mailto:tigers@autox.team.net">tigers@autox.team.net</A> </DIV>
<DIV><B>Subject:</B> [Tigers] Intake coolant</DIV></DIV></DIV>
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<DIV>Coolant is run through the stock intake. What is the purpose of the
coolant running through? Thought I had heard that it was to help warm the
intake in cooler weather. Down south I am hearing it's to help cool
the intake. So, what is the exact purpose? I have an aftermarket
intake on the Tiger with no coolant passages and don't see any
difference.</DIV>
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<DIV><FONT lang=0 size=3 face=Arial ptsize="12" family="SANSSERIF">Mark
L</FONT></DIV></DIV></TD></TR></TBODY></TABLE></DIV></DIV></DIV></DIV></BODY></HTML>