The Ford Barn

Bluebell · 08-04-2013, 12:09 AM

As JWL elluded to previously. The stat effectively stops or limits the water flow through the radiator until the stat begins to open (say 180F) it is fully open at say(200F)
These stats shown so far are all wax type stats. The wax expands to open them and contracts to close them. This is an action governed by the laws of physics.
They are reliable. If your engine is fitted with them with no extra holes drilled in them, they will not begin to open until the water on the wax pellet side of the stat reaches the designed temp. Your engine CAN run colder under extreme external conditions, but for most of you in the lower states your minimum operating temp is governed by the opening temp of those stats. This is good.
At the other end of the spectrum, conditions COULD be such that there is not enough differential between ambient temp and boiling point. I don't know how close these two temps can be, but it's going to be pretty hot.
In these circumstances your stat is going to be wide open, and I doubt that flow though the stat is going to be the limiting factor.
The point really is that most (I said most) people will have other issues with there vehicles, be it a dirty cooling system, loose belts, timing, (who always has their engine perfectly timed?) brakes dragging, fuel mixture,under inflation(tyres) and possibly a whole bunch of other things including up specing.
All of these things have to be 100% right, before we blame the thermostats.

Is Bob S. a member and can he give us a run down on any research he might have done?
Does anyone have any flow specs?

08-04-2013, 12:09 AM	#11
Bluebell Senior Member Join Date: Nov 2012 Location: Tauranga, New Zealand Posts: 726	Re: Shewman's High Flow Thermostats As JWL elluded to previously. The stat effectively stops or limits the water flow through the radiator until the stat begins to open (say 180F) it is fully open at say(200F) These stats shown so far are all wax type stats. The wax expands to open them and contracts to close them. This is an action governed by the laws of physics. They are reliable. If your engine is fitted with them with no extra holes drilled in them, they will not begin to open until the water on the wax pellet side of the stat reaches the designed temp. Your engine CAN run colder under extreme external conditions, but for most of you in the lower states your minimum operating temp is governed by the opening temp of those stats. This is good. At the other end of the spectrum, conditions COULD be such that there is not enough differential between ambient temp and boiling point. I don't know how close these two temps can be, but it's going to be pretty hot. In these circumstances your stat is going to be wide open, and I doubt that flow though the stat is going to be the limiting factor. The point really is that most (I said most) people will have other issues with there vehicles, be it a dirty cooling system, loose belts, timing, (who always has their engine perfectly timed?) brakes dragging, fuel mixture,under inflation(tyres) and possibly a whole bunch of other things including up specing. All of these things have to be 100% right, before we blame the thermostats. Is Bob S. a member and can he give us a run down on any research he might have done? Does anyone have any flow specs?