Yup, close-
it's actually for slightly ABOVE freezing temperatures,
in humid climates, like around here.
At 35 to 40f, air can have a lot of water in it.
Pull it though a pressure drop (like a throttle body, wide open or part
throttle)
and it'll drop in temperature- enough to freeze the water out
of the air.
And it freezes the throttle plate in the 'not- so- closed' position.
fwiw,
Toby
Pacific NW
-------------- Original message ----------------------
From: "Graeme" <graemes@internode.on.net>
> "Pertaining to my VG30 project. The throttle body has plumbing for coolant
> to flow through the bottom portion of it. Is this necessary to hook up?
> Gary Tew"
>
> Hi Gary,
> from what I have learnt over the years, the coolant feed to an inlet
> manifold/throttle body/ etc. is mainly to prevent the throttle from icing up
> during WOT operation.
> The vast volumes of air sucked in at WOT causes a chilling effect on the
> system and the butterfly(s) can freeze open.
> The next time you back off the throttle, guess what, your sphincter muscle
> will tell you something is awry!
> I'm told that in MILD climates, i.e. not prone to freezing temperatures or
> anything near that, the coolant feed is superfluous.
> Also, considering the velocity of the air going through the system, the
> temperature of same is not likely to be affected by a manifold heater.
> So, if the plumbing is getting too hard, try running without it, but fit an
> IGNITION KILL switch instead!
> Regards,
> Graeme Suckling
> 1965 SP310
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