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What is the benefit of this over the single stat housing?

THEFERMANATOR said:
They are very differrent T-stats fro meach other from a single to a dual. The single housing uses a conventional T-stat that has the plunger on the bottom to block off the bypass when the stat fully opens. The dual housings use a robert shaw style stat where the outside of it slides down.
Click to expand...

This could be another reason why people are over heating/running hot......Even with a Delco T-Stat, it could be the wrong one.

Need to figure out P/N's for single and dual stat housing T-Stats.


Good info....Thanks FERM.
 
Brooklyn Tow said:
This could be another reason why people are over heating/running hot......Even with a Delco T-Stat, it could be the wrong one.

Need to figure out P/N's for single and dual stat housing T-Stats.


Good info....Thanks FERM.
Click to expand...

Could be.

I've had a couple parts places try to sell me a thermostat for a single for my dual.

It was only after I looked inter computer myself did we find the proper thermostat.

Damned parts counter monkeys....


Sent from my iPhone using Tapatalk
 
I've used nothing but the high flow Stewart thermostat part number 306 ordered from Stewart Components Inc. in my single stat applications for many years. I've never had to replace one and the temp gauge has always read as it should.

Please explain more about how these stats don't work. What don't they block?
 
Since the size of the single thermo vs double thermo was brought up I'd like someone to help me. Here's a pic of the single thermo opening, which happens to be 2.25".

Does anybody have the opening size for the double thermo housing? A pic would be nice to have.

According to my memory (suspect) the double thermo opening is smaller for each individual thermo than the single thermo. I'm curious as to how the total sq inch compares, single vs double.

The pic turned out dark, but the flash kept washing out the face of the tape measure.

Don
 

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handcannon said:
Since the size of the single thermo vs double thermo was brought up I'd like someone to help me. Here's a pic of the single thermo opening, which happens to be 2.25".

Does anybody have the opening size for the double thermo housing? A pic would be nice to have.

According to my memory (suspect) the double thermo opening is smaller for each individual thermo than the single thermo. I'm curious as to how the total sq inch compares, single vs double.

The pic turned out dark, but the flash kept washing out the face of the tape measure.

Don
Click to expand...

I don't have a housing, but I've got a couple dual 'stats out in the garage.

I'll measure if I get a chance.

Although, a dual 'stat can be half the size of a single and still flow more with two.

Like intake/exhaust valves; it's about the circumferential area, not the radius/diameter. Two smaller valves (thermostats) have a larger flow area than one large single given the same amount of lift off it's sealing surface....

(getting deja vu, feel like I've had this exact discussion before)
 
You need to check your math. Do the numbers and post again . for simplicity sake use one thermostat that is 1" and one that is 2" diameter. So you are saying that (2) 1" diameter stats have more circumfrence than one 2" diameter stat. Diameter x pi = circumfrence

1 x pi + 1 x pi = 2pi 2 x pi = 2pi

great white said:
I don't have a housing, but I've got a couple dual 'stats out in the garage.

I'll measure if I get a chance.

Although, a dual 'stat can be half the size of a single and still flow more with two.

Like intake/exhaust valves; it's about the circumferential area, not the radius/diameter. Two smaller valves (thermostats) have a larger flow area than one large single given the same amount of lift off it's sealing surface....

(getting deja vu, feel like I've had this exact discussion before)
Click to expand...
 
The dual housing T-stat # is 131103 and is 2 1/8 diameter.
The single T-stat is # 13191 and is 2 17/32 diameter.
(Both ACDelco #s)

I haven't found anything about flow rates yet but I haven't looked much :thumbsup:
 
It's the area of the Tstat opening, pi x radius squared.

Basically what Les said.
 
Raleigh said:
The dual housing T-stat # is 131103 and is 2 1/8 diameter.
The single T-stat is # 13191 and is 2 17/32 diameter.
(Both ACDelco #s)

I haven't found anything about flow rates yet but I haven't looked much :thumbsup:
Click to expand...

Where did I read that the AC Delco 12T1E was the best one for the dual stat system? Did I screw up again?
 
Maybe someone with access to GM info could compare P/N's according to year, single or dual housings and correct T-Stat Temp 190* or 195*.....

Just thinking out loud.:rolleyes:
 
even the dealer list the bypass ones available for the duals. When I get some time I have to change mine out and I want to really take a look at my dual setup. Makes me wonder if some of the duals could use bypass tstats
 
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