| Slant Six Forum https://www.slantsix.org/forum/ |
|
| 1945 carb connections - questions https://www.slantsix.org/forum/viewtopic.php?t=50924 |
Page 1 of 1 |
| Author: | dookdart [ Fri Jan 25, 2013 4:55 pm ] |
| Post subject: | 1945 carb connections - questions |
I'm resurrecting a 76 Dart with 225, 3 on the tree, no ac, no ps, radio delete! The carb is a holley 1945, original to the car as I can tell. Its been rebuilt, by a local shop...and even flow tested upon rebuild. To the questions: referring to the Haynes and factory shop manuals, I know where all the vac. lines are going, and they all will be routed as stock....eventually.... For now, I don't have a charcoal canister. The canister input to the carb and the float bowl vent now are bare. The new gas tank does not have a return line as a vent, so I installed a vented gas cap. Question 1: how should I connect or terminate the 2 carb connections? should I just run a hose from the float bowl vent into the carb inlet port? Question 2: for initial start up, I don't want to have the airfilter assy installed, so I want to bypass the osac. I assume the osac input vac. line is ported vacuum, so I think I should just connect from that carb port directly to the dizzy advance. Agree? Thanks for the help........ |
|
| Author: | Aggressive Ted [ Fri Jan 25, 2013 5:09 pm ] |
| Post subject: | |
Check the free manuals listed in the Engine FAQ section for diagrams off all the fittings. You can down load a copy of the 1945 manual. http://u225.torque.net/cars/SL6/docs/Holley_1945.pdf 1. You can leave the float bowl vent line open for start up, no need to run it over to the canister yet. 2. No, the cap the OSAC line. Plug in the vacuum line on the bottom to the ported line per the manual. On start up just plug in the distributor line and the PCV lines, they are next to each other and cap the rest. Let us know how it goes..... |
|
| Author: | DusterIdiot [ Fri Jan 25, 2013 10:35 pm ] |
| Post subject: | x2, but... |
Quote: Question 1: how should I connect or terminate the 2 carb connections? should I just run a hose from the float bowl vent into the carb inlet port?
#1)If no charcoal cannister you can make a 'can' out of a spare container and some connectors of the right sizes to hook both hoses into it (need a spare charcoal can I have a couple in OK shape), best to just collect the fumes and overspill away from the exhaust manifold.Question 2: for initial start up, I don't want to have the airfilter assy installed, so I want to bypass the osac. I assume the osac input vac. line is ported vacuum, so I think I should just connect from that carb port directly to the dizzy advance. Agree? #2)Yes, just hook the OSAC port directly to the vacc. advance on the dizzy, no need to plug any other ports on the OSAC component itself. (FYI, check to make sure that they set the carb up as a 1976-1978 for that year of car, and if the distributor is stock for the year of the car you should be able to set the initial timing at 10-12BTDC. Also check the cat convertor before fire up if still equipped, those double monolithic convertors are prone to plugging up especially after getting caked full of oil blowby). -D.Idiot |
|
| Author: | dookdart [ Sat Jan 26, 2013 7:32 am ] |
| Post subject: | |
Yup....carb port to OSAC. check. No cat, removed with the exhaust system years ago. If I dont' replace the cannister (no vent tubing off the replacement gas tank.....running a vented cap) where should I plumb the float bowl vent? |
|
| Author: | DusterIdiot [ Sat Jan 26, 2013 9:07 am ] |
| Post subject: | No |
Quote: Yup....carb port to OSAC. check.
No carb port to dizzy can...eliminate OSAC period.Quote: No cat, removed with the exhaust system years ago.
Good deal there.Quote: If I dont' replace the cannister (no vent tubing off the replacement gas tank.....running a vented cap) where should I plumb the float bowl vent?
Make a 'purge can' that you can run both of those items to, so you keep their output away from the engine. Just make a can with 2 ports (PVC doesn't hold up so well to gasoline. Even a peice of pipe with a couple of thread in ports would work. Technically you could add a 3rd port and pumb that to our air cleaner to evacuate the contents of the can.What year is the gas tank? -D.Idiot |
|
| Author: | dookdart [ Sat Jan 26, 2013 4:57 pm ] |
| Post subject: | |
I am aware that the timed port from the carb, normally going TO the osac will be directly connected to the dizzy. I think we are all saying the same thing on that one! lol. The gas tank is a 73? the vent off the tank has a tube stub above the sending unit. the stub has been capped off. There is no line vent line running parallel with the fuel line, up to the front of the car. I installed a vented cap from a 65 barracuda / dart / valiant era car. So I shouldn't have any tank vac. issues. There is no canister. I might have an old one kicking around I was under the impression, the of the 3 lines into the cannister: 1 is IN from the gas tank, 1 is IN from the fuel bowl vent....and 1 is OUT from the canister INTO the carb purge port (just above the pcv valve port. That is why I figured why not connect the fuel bowl vent right into the carb port. |
|
| Author: | DusterIdiot [ Sat Jan 26, 2013 9:14 pm ] |
| Post subject: | Hmmm... |
That is the correct the '73 up tank would have that stub...but there should be a 1/4" or 5/16" fuel line from the front of the passsenger side fender to the rear of the car and terminating a few inches from the stub...If not something isn't right with the '76. On my '76 your estimation of the flow is almost correct, the one in from the tank works during warm weather...but during hard acceleration the pump will create a vacuum in the tank (new seals) and will pull the flow back the other way. Fuel bowl to carb port should work, but leave a larger loop of hose in case the fuel vent port actually 'purges' a large amount of fuel instead of vapor. -D.Idiot |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|