Join Date: Sep 2007. Also what size is the line from the vacuum modulator? I found that OPGI (), however, this fits from 1962 to 1964 Hydromatic transmissions, and this car has the TH400 transmission. 79 C10 LS swap - What do I do to the vacuum line to the trans? What happens to this now with the LS in? I am not sure about the port under the throttle blade, I know that on the Holley there should be a 10-32 set screw above the air bleed screw on the primary metering block. I was wondering if the line that was used on the 1964 cars would be the same as the 1965 Limo. Posts: 1, 248. 79 C10 LS swap - What do I do to the vacuum line to the trans. the one on the valve cover should go into the air cleaner port. Description: Powerglide. Link to comment Share on other sites More sharing options... So I just got a new Holley 650 double pumper and it's almost 100% installed. Description: 350 V8. I have it capped off at the carb end for now. If you run that rubber line down to the the vac modulator on the trans, it will collapse and not give you correct shift points.
Are you running an air cleaner spacer? Location: Whidbey Island, Washington. Like geezer said, if the engine has a healthy cam, it will want manifold vacuum. Join Date: Nov 2015. I know this is a little different than your set up, just giving you an idea.
Without vacuum the transmission will think your foot is 100% on the floor 100% of the time. Is it OK to put a T on the back so the shift modulator and PCV share the big back port? The other valve cover has a breather on it. I do have my back and advance hooked up to manifold vacuum under the throttle blades, so Is it OK to have the PCV and the transmission modulator both running to a T off the back of the carb? Description: Turbo 350 modulator line. Usually a big cam motor needs manifold vac. I'm hooking up all the vacuum lines and noticed I don't have a spot to plug the vacuum line that comes out of the valve cover into my carb. Vacuum modulator transmission vacuum line to carb adjustment. So I used an 1inch spacer user my carb wth a vacuum port. The transmission modulator should be hooked to the intake manifold port behind the carb (use the low profile fitting mentioned above), or it can be hooked to the small port below the throttle blades, but that will only leave you with ported vacuum for your vacuum advance. I have a 2 speed dynaflow. Shafer's Classic Reproductions - Transmission Vacuum Lines.
Secondly, most "experts" suggest using manifold vacuum (under the blades) for distributor advance rather than "ported" vacuum. Deluxe Side Markers. "I ain't nobody, dork. Location: Fort Wayne, Indiana, USA. Vacuum modulator transmission vacuum line to car rental. Is it even supposed to be down there? The Rebuild of Creeping Death after the wreck. Join Date: Apr 2014. Elderbrock 8096 it's available from summit, kegs, Amazon etc. It should show you where to hook up the valve-cover/pcv hose.
Location: Winona Lake, IN. If you run manifold vacuum to the advance, it will work, but part throttle driveability and fuel mileage suffers a little. Guest Riviera1963 Posted July 22, 2013 Share Posted July 22, 2013 So there was a vacuum line off the carburetor that lead down back behind the firewall, unfortunately when I went to go take it wasn't connected to anything down below. Can I just do it this way with a T hooked up to the big port on the back of the carb? Re: Where to hook up vac lines on new carb. Vacuum modulator transmission vacuum line to car insurance. I have an Edelbrock performer RPM and it does have the large vacuum port on the back and that's where my transmission line used to go but the Holley carb is in the way of that now. Vac modulator wants manifold vac. 73 "The Needy Beast". Can it hook to the carb or doe it have to go to intake manifold? Either a stand alone one or hooked to the air cleaner. If you have this particular line, and would like to sell it, please let me know. The transmission modulator vacuum line was cut and replaced with a rubber line from the carburetor to the modulator. I also used the stock manifold port for my modulator line.
The one on the back of the intake goes to the brake booster the one big one on the carb goes to the trans the one little one the right of the carb goes to the dizzy the other little one is usually capped off. You can search it to see a picture and infomation on it. The other valve cover will have the pcv valve, which should be hooked to the big port on the back of the carb. The little capped off one is sometimes used for vac accessorizes like vac cruze control or with some cars vac headlights etc. 06-23-2016, 02:45 PM||# 17|. I need to find a replacement line for this restoration project.
Owner installed options: Front Sway Bar. Look at the documentation that came with your carb. Description: Turbo 350. It's whay there is a hard line running down there from the factory. On my 72 I have a 350 with a 750 Holley doubler pumper with a Victor Jr. Intake which does not have a location to use a Vaccum fitting. What type of intake are you running?