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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