[NeighborsComplaint]

Originally Posted by Kenth

Looks like squarebore to me.

https://www.edelbrock.com/catalogsearch/result/?q=1912

Click the link ... 2nd to last pic shows it is clearly a spreadbore.

https://www.edelbrock.com/avs2-800-c...gine-1912.html

Here's the condensed version. Still look a squarebore to you?

[Kenth]

Originally Posted by NeighborsComplaint

Click the link ... 2nd to last pic shows it is clearly a spreadbore.

https://www.edelbrock.com/avs2-800-c...gine-1912.html

Here's the condensed version. Still look a squarebore to you?

Even though it has some distance between the primary bores 1912 is a squarebore design.

[carbking]

Originally Posted by NeighborsComplaint

Click the link ... 2nd to last pic shows it is clearly a spreadbore.

https://www.edelbrock.com/avs2-800-c...gine-1912.html

Here's the condensed version. Still look a squarebore to you?

Link CLEARLY shows a SQUAREBORE!

Interesting that e calls it an 800.

Carter called the same configuration a 625. New math???

Jon

[NeighborsComplaint]

Originally Posted by carbking

Link CLEARLY shows a SQUAREBORE!

Interesting that e calls it an 800.

Carter called the same configuration a 625. New math???

Jon

Square bore is defined as 4 equal size venturies whose outline forms a square, not the centerlines of the 4 venturi. The flange is dual pattern for squarebore and spreadbore mounting.

[Sirrotica]

When the secondary butterflies exceed past the axis between the front to rear mounting bolts, it can be considered a spread bore. Anything with all the butterflies within that axis is a square bore. Lots of early carbs had larger secondary bores, but were by no means a spread bore.

The Q Jet was the first carb I ever saw in 1967 that exceeded those boundaries of the axis of front to rear mounting bolts. the Thermo Quad was also of that same design. Holley had to make their interpretation of a spread bore too.

AFBs and AVSs were never considered a spread bore carb in any book, or with any of the people I ever knew in the car business, or hobby.