Nettet7. jul. 2010 · The throttle base plate butterflies have 172 stamped into each of them. A single hole was drilled and nicely chamfered in each butterfly. The base plate upper … Nettet3. jul. 2008 · If you have a holley around and its a 650, 750, or 850 can you measure the throttle bores for me? I have a few around with different bore sizes ... you have the list # off the carbs I can give you the specs down to original jet sizes/PV and what dia the venturi and butterflies are. Jul 3, 2008 #3 R. rustbucket79 Veteran Member. May ...
Holley 0-4777C 650 CFM Double Pumper Carburetor
Nettet5. jan. 2024 · The numbers I do have are P 46 on the driver side of the main body and R 24 on the passenger side of the main body. Also I have 172 on the primary throttle blades and 173 on the secondary blades. I only have a power valve on the primary side. The original owner sold it as a 850 but I'm not so sure. Nettet2. jun. 2005 · just for kicks unhook the vacuum advance and cap the port, reset the idle speed and then pull it down into drive and test it out. your combo may like ported vacuum better, or you may need an adjustable vacuum advance can to limit the vacuum advance curve. Brandon. 1966 SS396 Chevelle. 427 11:1 rect.heads. commerce bank australia
Cleveland
Nettet25. jan. 2006 · Butterflies: 2 x "172" and 2 x "173", all four look about the same size, T/B: "4779" and "1234770B", both on the linkage side. It also has "Siklon" ? or something like that in VERY small lettering. Any Info is greatly appreciated. PS - I'd look at the Holley site but my home dial up is painfully slow and I can't wait till I get to work! Many ... Nettet11. mar. 2024 · Recently you wrote an article that mentioned drilling holes in all four throttle blades on the Holley carb to change the blade position compared to the transfer slot. I have a 393ci small block Chevy (3.58 inch stroke in a 400 block) in my 1967 Nova bracket car (9.49 second ET/139 mph). NettetH25-73 BASE PLATE #4779 W/SHAFTS REPLACES H25-33 750CFM DOUBLE PUMPER Fits Double Pumper 650-750 Butterfly# 172 Pri.Butterfly# 173 Sec. Double Pumper 650-800 Butterfly# 172 Pri.- now comes with Butterfly# 172 Secondary: ... 0-4777sa Holley Carburetor Double Pumper Dual feed dry to fresh parsley ratio