Cooling System

DasWolfen at DasWolfen at
Thu Apr 10 11:09:52 EDT 2003

[ Picked text/plain from multipart/alternative ]
In a message dated 4/10/03 8:30:53 AM Eastern Daylight Time,
mdeltergo at writes:

> From:DasWolfen at
> [ Picked text/plain from multipart/alternative ]
>  Anyone who's ever experienced the "heat gain" phenomena after swapping an
> engine and forgetting to improve an already marginal cooling system will
> have a full understanding of the purpose of the aux radiator.
> Keith,
> it depends on why is was marginal in the first place, bad design, or
> plugged
> rad, heater core, tstat, bad coolant, bad rad fan?  I bumped the horsepower
> in my UrQ 20%, dropped the aux rad, and still run below an indicated 100C
> in
> 90 ambient.  Before the tsat in the 200 failed I ran 130MPH in the desert
> at
> high noon and the indicated temp was barely at the "thick middle" hash
> mark.
>  This indicated to me that the cooling system was pretty robust.  And you
> have Tom who is operating that way with no ill effects to date.
> Interesting.
> Mike

 Try this scenario. July, California, I-8, Westbound, 15 (?) miles at an +8 %
grade, A/C on, full throttle.

 An extreme scenario? Of course it is, but thats the type of thing the
engineers have to account for. Exactly what I didnt account for when I
dropped a 400hp, 500ftlb, 460cid BB into a 77 Ford Futura and left the stock
302 radiator in place. For two years I never had a heat gain problem till I
tried that long uphill late one July afternoon. I had been cruising in excess
of 100mph since Yuma, outside temp a hair over 120, A/C blasting, no problems
at all. (except watching my fuel gauge race for E)

 I have no doubt the stock 20v cooling system minus the aux can deal with
more than most owners will ever put it through but that was never the point.


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