Carter Thermoquad question

[Daniel Dugas]

Hey guys, quick question. I have a carter thermoquad I just picked up. I am trying to figure out details like the CFM of it. The number is 9377s. If anyone has any details I would greatly appreciate it!! Thanks!!

 

[A56]

Hey guys, quick question. I have a carter thermoquad I just picked up. I am trying to figure out details like the CFM of it. The number is 9377s. If anyone has any details I would greatly appreciate it!! Thanks!!

Just googled it.
Carter 821cfm 9377S Thermoquad

 

[Professor Fate]

A Carter Thermo-Quad Guide (carbkitsource.com)
Everything you need to know about TQs and more...

 

[Daniel Dugas]

A Carter Thermo-Quad Guide (carbkitsource.com)
Everything you need to know about TQs and more...

Thank you!!

 

[GTX JOHN]

None of my info shows that number and I have several sources.

 

[Bewy]

Not on my list either. Could it be 9371? 318 auto.

 

[Daniel Dugas]

Th

Not on my list either. Could it be 9371? 318 auto.

That could be. I had someone read it off to me. That would make sense.

 

[Daniel Dugas]

But this looks like a pretty big carb. I searched the internet and couldn’t find anything so maybe it’s an aftermarket carb.

 

[Bewy]

If the number is 93XX, it is not aftermarket.
The big 850 cfm has 1.5" pri bores; the smaller 800 cfm has 1.375"pri bores. So easy to tell which size.
There were some Ford 429/460s I believe that used the TQ; also IH used them on trucks. I had a IH carb here recently; the fuel inlet was in the centre rear of the carb. Mopar carbs have the fuel inlet, rear, pass side.

 

[GTX JOHN]

Nope Not a aftermarket unless 98xx number.
Never 93xx number
They all Look Big.
All 93 numbers are late emission carbs

 

[Daniel Dugas]

If the number is 93XX, it is not aftermarket.
The big 850 cfm has 1.5" pri bores; the smaller 800 cfm has 1.375"pri bores. So easy to tell which size.
There were some Ford 429/460s I believe that used the TQ; also IH used them on trucks. I had a IH carb here recently; the fuel inlet was in the centre rear of the carb. Mopar carbs have the fuel inlet, rear, pass side.

It’s number was 9377s(or something close). The similar numbers were all mopar carbs

 

[Daniel Dugas]

Nope Not a aftermarket unless 98xx number.
Never 93xx number
They all Look Big.
All 93 numbers are late emission carbs

Thank you!!

 

[Daniel Dugas]

 

[Hysteric]

Measure the throttle bore and that will tell you the size. After that you can change the calibration to what an early performance carb came with.

 

[Daniel Dugas]

Measure the throttle bore and that will tell you the size. After that you can change the calibration to what an early performance carb came with.

Thanks

 

[Dana]

If the front throttle blades are stamped 314, it’s the big one. If they are stamped 315, it’s the small one.

 

[Vaanth]

View attachment 1715960109

Its an older thread, but if still seeking information for this Thermo-Quad, the #9377S was equipped on 1981 360 heavy duty truck late year Federal applications. The original Chrysler part number is 4213714.

Primary jets: 120-4096
Secondary jets: 120-5125
Metering rods: 75- 2377 with step sizes: .066", .054", .040"

Primary bores: 1-3/8"
Flow rating: 750-800cfm

The carburetor shown was manufactured Friday, April 24, 1981.