I think the part that I saw that said engines like the range 210 degrees was
in a ford book (Might have been one of the engine rebuild books on SBF's) but
it showed temp vs. metal wear. Not sure if this is what your were talking
about but always interesting to see the chart.
I just found a link that has a
similar chart to the Ford one here.
http://www.carnut.com/ramblin/_cool3.html
I have had similar 230-240 temps at the track in the 65 mustang with the stock
shaped top tank fluidyne and finally am going to replace it with a full sized
side take radiator. Water wetter did help as well as getting rid of the
anti-freeze, water wetter did nothing with the antifreeze however.
Sandy
----- Original Message ----
From: "MWood24020@aol.com" <MWood24020@aol.com>
To: chris@cthompson.net; bobbridgeford@msn.com
Cc: sralsten@ca.rr.com;
tigers@autox.team.net; todbrown@roadrunner.com
Sent: Friday, August 29, 2008
7:32:35 AM
Subject: Re: [Tigers] How hot is hot ?
In a message dated
8/29/2008 7:14:59 A.M. Pacific Daylight Time,
chris@cthompson.net writes:
I've also heard many times that our engines *like* 210 degrees. That's
about where I run, and it's never bothered me.
But I've never heard about
temp negatively impacting HP, although I
guess it makes sense. Anybody have
more data on that?
Not Tiger-related, but I've been battling overheating in
my Lotus
Formula Ford ever since I got it about 3 years ago. On a 90 degree
day,
I often will run up to 230 or 240 degrees. I would love to blame not
getting the podium on my overheating problems ;-)
I know ambient temp
will effect horsepower production, i.e. at 110 degrees
an engine makes about
5% less power than at 75 degrees, but I've never heard of
any motor (outside
of two strokes, which is a different deal) losing power
due to temps of
moving parts. Maybe if tolerances were very loose or the
engine was very
tired, there could be cylinder pressure/sealing loss or if the
engine was
hot enough to break down the lubricity of the oil??
On the other hand, there
can be good power gains derived from running oil
temps to the higher end of
their range, due to decrease in windage and roping.
On your FF, given you
are running a quality synthetic race oil, I wouldn't be
concerned with
230-240 degree oil temps. On the FV car I ran a few years ago
(before
getting obsessed with autocross), we found nearly 4hp on the dyno
when
taking oil temp from 200 to 260, which is still in a range where break down
is a non issue. That may not sound like much, but it was a near 6% pick up
in power ;-)
**************It's only a deal if it's where you want to
go. Find your travel
deal here.
(http://information.travel.aol.com/deals?ncid=aoltrv00050000000047)
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