Yet an even higher flow thermostat?

[Old Henry]

I just received a PM tipping me off to what appears from pictures to be an even higher flow thermostat than the Stant stat that I have previously found to be the highest flow of any that I've studied. This one is a MotoRad High Flow Thermostat (their part # 2003-195) that also fits the 1990 Subaru Justy and the Ford 59A engines like the Stant 14157 does. I would probably be interested in them if they weren't 195°. For any that likes running their 59A that hot it looks like the best thermostat I've seen so far.

Here are the two thermostats side by side. The Stant on the left and the MotoRad on the right. What do you think?

[30-9]

170?

Also looks like new one has three on top & stant two - three would restrict flow more than two - no?

Looks like you have your work cut out for you

[SofaKing]

http://www.carid.com/motorad/high-fl...-2003-195.html

The link shows they flow 56 GPM and open at 195 degrees. Are you going to measure the actual flow and if so how? I got a pair of 36 pumps from Skip, I don't know what they are rated at. I am curious what you discover.

[Lanny]

Originally Posted by 30-9

170?

Also looks like new one has three on top & stant two - three would restrict flow more than two - no?

Looks like you have your work cut out for you

================================================




Look close at the size of the center core.












.

[Diavolo]

I just googled this part # 2003-180 thermostat and I got pics of the same thermostat rated at 180.

https://www.google.com/search?q=part...w=1280&bih=899

[Old Henry]

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Originally Posted by Diavolo

I just googled this part # 2003-180 thermostat and I got pics of the same thermostat rated at 180.

https://www.google.com/search?q=part...w=1280&bih=899

That's cool. I might be persuaded to run at 180°.

[Old Henry]

Originally Posted by 30-9

170?

Also looks like new one has three on top & stant two - three would restrict flow more than two - no?

Looks like you have your work cut out for you

Googling MotoRad 2003-170 didn't come up with anything. Darn, that would have been my favorite.

I had that same thought that the three wide braces may cut into the flow more than the two skinny ones on the Stant even though the overall diameter of the valve opening looks bigger on the MotoRad. I'd have to measure and calculate the size of the MotoRad's three openings and compare their total to the Stant total opening. Could be sixes.

[Lawson Cox]

Originally Posted by Diavolo

I just googled this part # 2003-180 thermostat and I got pics of the same thermostat rated at 180.

https://www.google.com/search?q=part...w=1280&bih=899

Wonder why the differences in pricing for same thermostat?

[Old Henry]

Originally Posted by SofaKing

http://www.carid.com/motorad/high-fl...-2003-195.html

The link shows they flow 56 GPM and open at 195 degrees.

Here's their video about that: https://www.youtube.com/watch?v=pJhH7RkIH8c

[Kurt in NJ]

Is this flow tested with the thermostat setting in a tube like the neck of the head----if the disc is too large the area between the neck in the head and the disc could be the flow limit

[Ronnie]

Motorad definition of hi flow

http://www.motoradusa.com/thermostats.aspx



R

[expavr]

According to a 2013 thread on the Barn Skip's pumps with the high speed impeller flow about 22 GPM. If that is true what is the advantage of a stat that flows 56 GPM? Assuming the stat functions properly it would seem that the water pump is the restriction to a higher flow rate in the cooling system and not the stat.

"Foxy, Skips email is [email protected] Phone # AM 1-941-637-6698 PM 1-941-505-9085
Lucky, The 37 to 53 pumps all get the turbine impellers that increase the flow of each pump from 65 gallons in 5 minutes to 110 each. G.M."

[Mike51Merc]

Why do you want more flow? From what I've learned about cooling systems you want restriction in the flow.

[G.M.]

Originally Posted by expavr

According to a 2013 thread on the Barn Skip's pumps with the high speed impeller flow about 22 GPM. If that is true what is the advantage of a stat that flows 56 GPM? Assuming the stat functions properly it would seem that the water pump is the restriction to a higher flow rate in the cooling system and not the stat.

"Foxy, Skips email is [email protected] Phone # AM 1-941-637-6698 PM 1-941-505-9085
Lucky, The 37 to 53 pumps all get the turbine impellers that increase the flow of each pump from 65 gallons in 5 minutes to 110 each. G.M."

Do you really believe a 55 gallon drum of water could be forced through
a hole the size of the opening in any of the thermostats shown with stock
Ford pumps that are just paddle wheels spinning in water?? When the
stock pumps feel a restriction they just sit there spinning their wheels
and stirring up air. Skips pumps with larger impellers deliver more water
and less air. The turbine type impeller is set in a 22 degree seat with
a controlled gap and very little air and slippage occur. The reported
improved cooling over the past 20 years confirm the results. G.M.

[G.M.]

Originally Posted by Mike51Merc

Why do you want more flow? From what I've learned about cooling systems you want restriction in the flow.

Mike, There are three things that cool the engine. The size and amount
of coolant in the system. The amount of coolant flowing through the
system. And the amount of air flowing through the fins of the radiator.
If any one of these is improved a little better cooling is noticed. If all
all are improved then the engines will run cool. I have performed cooling
tests on flatheads for many years in SW Florida in temperatures above
90 degrees. I have a 39 P/U that was run at a National Ford meet in
Maryland in about 2004 for over 2 hours at a fast idle with the outside
temperature over 100 degrees and never got over 180. When raced
slightly the temperature dropped a few degrees. This truck was fitted
with Skips pumps, 6 blade industrial fan, standard radiator, 4 lb
pressure cap and a shroud. Temperatures were taken every 10 minutes
on the water outlets of the heads and recorded. Don't believe water
has to stay in the radiator to cool it, that will just make it hotter. G.M.

[expavr]

G.M. I have a Meziere 300 electric water pump on a supercharged Hemi that the manufacturer claims will flow 55 GPM. With this pump there would be a need for a stat that flows 56 GPM to minimize the potential for cavitation. My point in this discussion is there is no apparent need for a stat that flows 56 GPM when the best the pumps can do is 22 GPM. My observation is in no way a discredit to Skips pumps or his design. In fact I'm using them on the tonner, but they are in fact the limiting factor for coolant flow on my flathead. As an aside what RPM did Skip use to establish the flow data you provided (110 Gal in 5 minutes) in that thread? Just curious.
Les Williams

[Old Henry]

Originally Posted by expavr

As an aside what RPM did Skip use to establish the flow data you provided (110 Gal in 5 minutes) in that thread? Just curious.
Les Williams

I would also like to know what engine it was pumping through, and what thermostats were in the engine that they were pumping through.

[FireEngineMike]

Some additional info from Stant.
"The Stant Superstat has the highest flow of any thermostat in the aftermarket."
"A thermostat starts to open at the rated temperature +/- 2 degrees F. The thermostat is fully open at 15 to 20 degrees F above the rated temperature." That means the Stant 14157 starts to open at 170 and is fully open at 185-190 degrees.
Craig, I sent another PM before finding your new thread.

[G.M.]

Originally Posted by expavr

G.M. I have a Meziere 300 electric water pump on a supercharged Hemi that the manufacturer claims will flow 55 GPM. With this pump there would be a need for a stat that flows 56 GPM to minimize the potential for cavitation. My point in this discussion is there is no apparent need for a stat that flows 56 GPM when the best the pumps can do is 22 GPM. My observation is in no way a discredit to Skips pumps or his design. In fact I'm using them on the tonner, but they are in fact the limiting factor for coolant flow on my flathead. As an aside what RPM did Skip use to establish the flow data you provided (110 Gal in 5 minutes) in that thread? Just curious.
Les Williams

The water pump test machine Skip uses runs at about 2,000 RPM's.
How do you figure Skips pumps limit your cooling??? G.M.
Email my I'd like to discuss it. [email protected]

[FireEngineMike]

Craig, your PM box is full.