Triumph

TRIUMPH 4 CYLINDER 1980-76 1493cc Spitfire ZS-1 150CD 4278 1980-75 1998cc TR7 (2 Carb) ZS-1 175CD 4278 1976-75 1998cc TR7 ZS-1 175CD 4278 (Calif, 1 Carb) 1975-73 1493cc Spitfire Mark IV ZS-1 150CD 4278 1974-72 1296cc Toledo SU-1 HS-4 4330 1972-70 1296cc Spitfire Mark IV SU-1 HS-2 4330 (2 Carb) 1972-70 1493cc Spitfire 1500 SU-1 HS-4 4330 1972-69 1296cc Spitfire ZS-1 150CD 4278 Mark III, IV 1968 2138cc TR4A (2 Carb) SU-1 HS-6 4330 1968-67 1296cc Spitfire Mark III SU-1 HS-2 4330 (2 Carb) 1966-65 2138cc TR4A (2 Carb) SU-1 HS-6 4330 1966-62 1147cc Spitfire Mark III SU-1 HS-2 4330 (2 Carb) 6 CYLINDER 1976-69 2498cc TR6 (2 Carb) ZS-1 175CD 4278 1974-66 1998cc GT6, Mark I, II, III ZS-1 150CD 4278 (2 Carb) 1973-72 1998cc Bullet, Sprint SU-1 HS-6 4330 (2 Carb) 1969-68 2498cc TR250 (2 Carb) ZS-1 175CD 4278 1964-63 1596cc Vitesse (2 Carb) SU-1 HS-2 4330 1973-70

Recent Posts

Tri-Power Carburetors

Rochester Tri-Power carburetor kits. These are
the 2G and 2GC carburetors. The 2GC is the carburetor in the middle and
would have the automatic choke attached. The front and rear carburetor
does not have a choke.Selecting kits for the tri-power carbuetors is straight forward if you
still have the tags attached to the top of the carburetor. Rochester
did not stamp the carburetor number in the side of the carburetor until
1968.Tri-power carburetors use two different carburetor kits. One kit for
the center and the other kit for the front and back carburetors. Each
kit services one carburetor, so to do all three carburetors you will
need three kits.

Be careful because chances are you may not have the original
carburetors. It is rare that we see a tri-power setup that has the
correct carburetors (numbers matching).

Here is an example of a tri-power setup. Notice that the front an rear
carburetors use the same carburetor kit, but the center carburetor uses
a different kit.

1959-61 Chevrolet V-8 A/T NO AIR

7013015 FRONT CARBURETOR Tri-Power Carburetor Kit K6121
7013017 REAR CARBURETOR Tri-Power Carburetor Kit K6121
7013016 CENTER CARBURETOR Tri-Power Carburetor Kit K636

What if you don’t have the carburetor tags?

You have to make the best guess and the suggested way is to take the
carburetor apart and carefully compare the old parts with the parts we
have illustrated in the photos, or videos.

Here are the typical carburetor kits used on the Chevrolet carburetors
(prior to 1968)

K636

K355

K427

K6121

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