Stock radiator temps
#26
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Originally posted by pomanferrari
I don't know, empirical evidence seems to indicate that aftermarket rad like fluidyne does lower temps.
My normal temp with ambient at 95 degrees is around 200 on hwy no boost, 220-230 in traffic. Turned on fan earlier via Datalogit and got about 10 degrees lower.
With the Fluidyne it has never risen above 210 no matter how hard I flog it. This is w/o a good seal like the stock rad.
BTW the fluidyne is very heavy, almost three times the stock radiator weight. It has about twice the fluid capacity as the stock.
I don't know, empirical evidence seems to indicate that aftermarket rad like fluidyne does lower temps.
My normal temp with ambient at 95 degrees is around 200 on hwy no boost, 220-230 in traffic. Turned on fan earlier via Datalogit and got about 10 degrees lower.
With the Fluidyne it has never risen above 210 no matter how hard I flog it. This is w/o a good seal like the stock rad.
BTW the fluidyne is very heavy, almost three times the stock radiator weight. It has about twice the fluid capacity as the stock.
#27
Eats, Sleeps, Dreams Rotary
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not trying to steal the thread or anything, but is it possible in 100+ degree weather having a temp gauge sensor drilled into the filler neck can become heat soaked?
#28
Blow up or win
One of the biggest items everyone overlooks when talking radiators is the "bung" that collects between the fins.
It is a collection of dust, rubber from tires, pollen, small grains of dirt and sand, insect and plant parts, road grime, etc. It is pretty much glued on to the metal over time from heat. It's impossible to remove. Picking the large stuff out and keeping the fins straight helps, but it is a very small part of the overall equation.
The "bung" ruins the efficiency of the radiator over time. It is insidious and leads almost everyone down other paths when troubleshooting cooling issues. Almost every shade tree mechanic will diagnose the problem as a "clogged" radiator - on the inside. Even though you can still see through the fins they are no longer smooth enough to let air flow cleanly.
The OEM radiator is VERY efficient and light, and except for those damned plastic end tanks works exceptionally well.
It is a collection of dust, rubber from tires, pollen, small grains of dirt and sand, insect and plant parts, road grime, etc. It is pretty much glued on to the metal over time from heat. It's impossible to remove. Picking the large stuff out and keeping the fins straight helps, but it is a very small part of the overall equation.
The "bung" ruins the efficiency of the radiator over time. It is insidious and leads almost everyone down other paths when troubleshooting cooling issues. Almost every shade tree mechanic will diagnose the problem as a "clogged" radiator - on the inside. Even though you can still see through the fins they are no longer smooth enough to let air flow cleanly.
The OEM radiator is VERY efficient and light, and except for those damned plastic end tanks works exceptionally well.
#29
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Originally posted by RCCAZ 1
The issue that no one has addressed yet is the engine's ability to flow coolant through the rotor housings........ but the real cooling culprit with Gen 3s is system FLOW.
The issue that no one has addressed yet is the engine's ability to flow coolant through the rotor housings........ but the real cooling culprit with Gen 3s is system FLOW.
OTOH, ducting is probably more important than any of the other mentioned concerns. The sides of the radiator are not nearly as efficient as the combined surface area of all the fins. Forcing the air through the radiator is the only way (within reason) to truly achieve significant coolant temp decreases.
Damon, with my Fluidyne running 13psi at Mineral Wells (~95F ambient), I came off my afternoon sessions pushing 117C. That's 242F ..... extremely hot. Once off boost and in a cooldown, the temps dropped quickly to the 100's. Needless to say, I need to duct my radiator and then .... I need a bigger intercooler.
#30
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Originally posted by RonKMiller
It is a collection of dust, rubber from tires, pollen, small grains of dirt and sand, insect and plant parts, road grime, etc. It is pretty much glued on to the metal over time from heat. It's impossible to remove.
It is a collection of dust, rubber from tires, pollen, small grains of dirt and sand, insect and plant parts, road grime, etc. It is pretty much glued on to the metal over time from heat. It's impossible to remove.
#31
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Originally posted by redrotorR1
Damon, with my Fluidyne running 13psi at Mineral Wells (~95F ambient), I came off my afternoon sessions pushing 117C. That's 242F ..... extremely hot.
Damon, with my Fluidyne running 13psi at Mineral Wells (~95F ambient), I came off my afternoon sessions pushing 117C. That's 242F ..... extremely hot.
#32
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Originally posted by 1stand3rd
Put me in with the group that says an aftermarket radiator will not allow a car to run cooler. It will just allow you a longer duration of appropriate operating temps during extreme conditions.
I look at it this way...say you have a gallon of water in a pot on the stove that you want to bring to a boil. A 1 gallon pot won't take as long to bring to a boil as a 2 gallon pot. Eventually, they both come to a boil.
Put me in with the group that says an aftermarket radiator will not allow a car to run cooler. It will just allow you a longer duration of appropriate operating temps during extreme conditions.
I look at it this way...say you have a gallon of water in a pot on the stove that you want to bring to a boil. A 1 gallon pot won't take as long to bring to a boil as a 2 gallon pot. Eventually, they both come to a boil.
The cooling performance of a radiator depends mostly on the length of the piping, velocity of the flow, surface area of the cooling surfaces, inlet water temp, inlet air temp. In the fluidyne, the length of piping and cooling surfaces are larger. All other things being equal (hoses and flow speed), you can expect to get cooler water out the outlet. This will create both lower engine temps and heat removal capacity. I'm willing to bet anyone who didn't see a change changed something else.
Another way to look at it is to put in a water temp gauge, add an aftermarket radiator, and watch the operating and peak temperatures go down. Many have done it before and I'll be doing it shortly (have a temp gauge on the way, and I'll install a miata thermoswitch and later a Fluidyne and note the changes).
Dave
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