I run no bypass on the Mustang and have some holes drilled in the T-Stat like
Jim's Tiger. Never, the car runs hot like a Tiger but never had a comparison
of running with a bypass hose. Just always seems like an extra hose to leak :)
And to the holes in the t-stat I'll bet it won't make much of a difference
IMO, the t-stat is likely open somewhat at 175F anyway so the holes would not
make much difference (They are still pretty small).
Sandy
----- Original
Message ----
From: "Smit, Theo" <Theo.Smit@dynastream.com>
To:
tigers@autox.team.net
Sent: Monday, September 28, 2009 3:05:22 PM
Subject: Re:
[Tigers] oil temperature - slightly off topic.
Somewhat related, I choked
down the water pump bypass a week ago and
found it made a huge difference in
the operating water temperature - so
much that I might have to go back and
undo some of my work.
I ran into Jim Foster (if you're lurking, give me a
shout sometime!) at
the local European car show&shine at the end of July, and
he suggested
to plug off the bypass, and just drill some bypass holes in the
thermostat to keep the pump from deadheading when the thermostat was
closed. I
didn't quite go all the way on that, but instead I threaded
the inside of the
bypass hole in the thermostat housing 1/8" pipe, put
in a pipe plug, and then
drilled the center of the plug 3/16". This
effectively cut the area of the
bypass port to 1/4 of what it was. Then
I drilled 3 5/32" holes in the
perimeter of the thermostat body, to add
to the 1/8" hole I'd already put
there.
Previously the engine would warm up to about 190 or 200 (185
thermostat)
even in 60 degree weather. Now, when I'm driving the car at light
loads
even in 70+ temperatures, it will go back to 175 or so. So I might have
overdone the holes in the thermostat - time to get a new one and drill
one
less hole in it I guess.
Cheers,
Theo
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