>OK everyone, i need some advice. I am to the point of installing the offy
>intake (1x2) and the fenton headers on my 235. Question, do i need to heat
>the intake, if so how. I know there are holes in the exhaust manifold that
i
>have been told i need to link together. Is this true?
Depends on where you live. Out here in the wild west, you can ignore it
completely. In the colder places, you're going to need to heat the carbs in
the cold weather.
Although the offy manifold doesn't sit on the exhaust collector like the
stock setup, it does come pretty darn close, at least to the forward header.
In fact on mine, I had to carefully file the two manifolds away from each
other to get them to fit. So although it will take longer, the fentons will
eventually heat up the offy.
As you noticed, the fentons have little holes drilled in them so you can put
a little choke stove on them. These probably won't do much good unless
you're using an automatic choke on the rear carb (You don't need a choke on
the front.) You can make a little choke stove out of steel tube to help
with warm up.
If you're in bitter cold weather: (1) get a beater and don't drive your old
truck until it warms up; and (2) you can make heat risers out of foil tube
from the exhaust manifold to the air cleaner to warm the intake air. Get
the foil tube at any auto parts store, drill a hole in the air cleaner
bottom (NOT an oil bath air cleaner) to match the diameter of the tube, and
make steel sheet fittings to attach tube to air cleaner and tube to exhaust
manifold. Take a look at a modern car engine for ideas on how to fashion
and secure the fittings.
If you have nice fentons and an offy intake, putting a couple of ugly foil
heat risers is like seeing your cute girlfriend in a burlap moo moo. I'd
try running it without special heating devices first, and add on only if it
becomes a problem.
Regards,
Grant S. gls@4link.net
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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