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CENTER CARB 1966 389 engine (California carb) Lots of changes here
The 1966 Pontiac Tri-Power Carburetors information, as requested. (For verification of the Carburetor Calibrations that you have on your 1966 Engines. I will post the Center Carb: 7036175 info now. Same format, again, from the Rochester Products People in the way the information is presented by them. Air Horn Number: 7031588 (1) Venting: Internal 7007199 Vent Tube External Venting: Idle Vent Support: None Needle Seat: 7026305 Size: .120 Float Valve: 7022779 Pull Clip: 7006474 Float Assembly: 7012028 Spring: None Fuel Level: .625" at 6.0 psi Mech. Setting: .594" Drop: 1.97" (to sharp edge of seam at toe of float) Pump Assem: 7032280 (synthetic) RET Spring: 7004597 Size: .025" DUR Spring: 7011385 Size: .045" Pump Rod: 7025575 Length 3.06" Pump Jet: drill (2) Size: .028" Jet Location: In Cluster CAP cc/10 strokes: 18.0 - 21.0 Rod Set: .952 from air cleaner flange surface to top of pump rod (3*) Power Piston Assy: 7012266 act spring 7012265 Oz 8.5 Color (green) Power Valve Assy: 7011989 Power Rest: 7010141 Size: (.041) Metering Rod: (blank) Spring: (blank) Rod Size, Power (blank) Econ: (blank) Cut-In down at: 11 "Up" at: 8 all in at 6" hg MM. Jets: 312 cc, 60 degree, 7008661 "C" 7013333 Idle Compensator Assy: (140 degree (+ - 10 F) Opening Temp Choke Housing: (2*) (Some of the next 14 lines available for the Choke Description are blank) Here are the ones with Info: Valve No: 7033443 Angle: 20 degrees Cam No: 7020541 Choke Link: 7019524 Length: 2.671" wo Kick: .143 - .183 Second Step: .090 .100 Vacuum Break: 29 degrees + - 1.5 degrees (.214 - .238) Float Bowl (Finish) Float Bowl and Body Number: 7031625 (2*) Venturi Size: 1-3/16" Cluster: 7031293 (4*) Boost Size: 1/8 Nozzle: 7012877 rel .055 Idle Tube: 7011032 "C" Size: .032 Channel Rest: 7004520 Size: .048 Hi-Speed Bleed: drill (2) Size: .028 L.I.A.B: None Idle Bleed: None Top Bleed: .039 over idle tube Side Bleed: .033 Insert: (2) 7008866 (trumpet) Radial Tubes: (blank) Size: (blank) Crossover Chan: .125 Main Well Chan: None Throttle Body Assem: 7031291 Body & Bowl Assem: (blank) Thr Body No: 7031292 Bore: 1-11/16 Thr Valve: 7019299 Angle 10 degrees Idle Needle: 7029605 angle: 20 degrees Idle Needle Orifice: .074 - .078 Spark Port .030 x .090 loc. .045 + - .003 Top Valve Top corner Slot Port Punch Length: .250 Width: .030 Port Punch Loc: .243 Top Valve Top Slot Other: 7032290 throttle body gasket 7020778 thr shaft lever assy 7024885 throttle lever .096 hole in thr valve thr shaft offset .017 - .023 Spark Limits 3 Hg @ 1.1 lbs/min air min 12 Hg @ 2.3 lbs/min air min Test Specification 7022221 & 7022224 Min Air: .65/ lbs min Idle Air rate: 1.05 lbs min A.I.O Set Point 2.0 lbs min Box Balance 18" Hg - 3" Hg (Note all 2 BBL carbs are tested at 3" of mercury (TV) Remarks: 7013333 idle comp assy 140 degrees F + - 10 degrees F opening temp (1*) 7021007 air horn gasket 7031590 nut - fuel inlet bend pump lever tang to open idle vent with .020 gage between thr valve & bore on side opposite idle needle. (2*) 7033388 Screw "off idle" air adjust (3*) 7026097 vacuum break control assy 7026098 remote choke coil assy (4*) .026 dia hole aspirator to main well bleed date 3-19-1966 Customer 1966 2G Pontiac (Syn) CALIF. "389 Engine" A/C -Non A/C (center) Pow. Pak for Pow Pak assys 7026174 Model 7036175 Similar to 7026175 Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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