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Message
1. Do you have a drawing
and/or specs from the manufacturer that you could scan and email to me to look
at? I would be interested in trying some heat transfer calculations on the
system, but need the physical layout details to make much sense of it.
Hi Bill (and Ed),
Thanks for the offer, but unfortunately, there's
absolutely no hard data to be had for the oil/water heat exchangers that are in
the radiator. I quizzed just about everyone that works for Howe, and
came up with nothing. I saw one vague picture that shows a
cylindrical looking tube, with no details at all. They claim that racing
guys use one exchanger, and have no problems, so I decided to try two,
knowing that it was just going to have to be a trial and error
test.
I talked to Bruce, and found that 210 is indeed the
accepted oil temp limit going into the engine. He said that higher temps
would take a toll on almost every part in the rotors, since it wouldn't be
getting the cooling that it needed. So first priority is to get a sensor
installed to read the oil temp to the engine, rather than in the
pan.
I had also thought about the fact that the thermostat
would limit flow through the radiator, which would negatively impact the
function of the oil heat exchangers. Unfortunately, I can't let
the water temp run at 130, so the thermostat stays. I have a spare 1/2 NPT
female port on the inlet, and outlet tanks of the radiator, and was
thinking about the possibility of using an electric pump (CSI #923 http://www.csiperformance.com/water_pump3.html )
to keep some water flowing through the radiator. I mentioned this to
Bruce, and he suggested that I could plumb the water heater
outlet back to the radiator inlet tank to keep some water flowing. He
didn't think this would be enough flow to keep the thermostat from working
properly, and it will be way easier to hook up, so I'll probably try
it.
Thanks for the thoughts.
Rusty
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