"Buick Trademark(s) used with the written permission of General Motors"
SPECIFICATION |
3645SA-SB |
3646S |
3634S |
3924S-SA |
3925S-SA |
4050S |
4051S |
| Thro. Bore Prim. & Sec. Size | 1 9/16" (P) 1 11/16" (S) |
1 9/16" (P) 1 11/16" (S) |
1 9/16" (P) 1 11/16" (S) |
1 9/16" (P) 1 11/16" (S) |
1 9/16" (P) 1 11/16" (S) |
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| Main Venturi Prim & Sec. Size | 1 3/16" (P) 1 9/16"(S) |
1 3/16" (P) 1 9/16"(S) |
1 3/16" (P) 1 9/16"(S) |
1 3/16" (P) 1 9/16"(S) |
1 3/16" (P) 1 9/16"(S) |
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| Vents in Air Horn & Body Amt. | 13 | 13 | 13 | 13 | 13 | ||
| Low Speed Jet in Prim. Venturi Size | .031 | .031 | .031 | .031 | .031 | ||
| By-Pass in Prim. Venturi Size | .0453 | .040 | .0452 | .0452 | .040 | ||
| Econ. in Prim. Venturi Size | .043 | .043 | .043 | .043 | .043 | ||
| Idle Bleed in Prim. Venturi Size | .0465 | .0465 | .0465 | .0465 | .0465 | ||
| Idle Port & Restr. Jet Size | .150x .030 .0275 Jet |
.150x .030 | .150x .030 x .051 |
.180x .030 x .051 |
.150x .030 | ||
| Anti-Per Bleed in Prim. & Sec. Venturi Size | .036 (P) .031 (S) |
.036 (P) .031 (S) |
.036 (P) .031 (S) |
.036 (P) .031 (S) |
.036 (P) .031 (S) |
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| Main Vent Tube Prim. & Sec. Venturi Amt. Side Holes | 6 (P) 3 (S) |
6 (P) 3 (S) |
6 (P) 3 (S) |
6 (P) 3 (S) |
6 (P) 3 (S) |
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| Sec. Pick Up Tube (T) & Discharge Port (P); Bleed (B) Size | .052 (P) .0292 (S) |
.052 (P) .0292 (S) |
.052 (P) .0292 (S) |
.052 (P) .0292 (S) |
.052 (P) .0292 (S) |
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| Pump Jet in Prim. Venturi Size | .028 | .028 | .028 | .028 | .028 | ||
| Choke Setting | No Choke | Index | Index | Index | Index | ||
| Vacuum Spark Port Size | none | .130 X .040 | .130 X .040 | .130 X .040 | .130 X .040 |