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My guess is that is would be a vacuum modulator for the transmission, but I cannot find any place where it would go on the transmission. If OTOH you are keeping the Turbo 350 or 400 that you have, you need to hook it up and supply it with manifold vacuum. Vacuum modulator transmission vacuum line to carb replacement. Does it have s threaded port in the rear where you can add a vaccum 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 it capped off at the carb end for now.
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. It's the same size as the transmission shift modulator so I can't use one of the small ports. The little capped off one is sometimes used for vac accessorizes like vac cruze control or with some cars vac headlights etc. Also what size is the line from the vacuum modulator? Location: Hyattsville, Maryland. So I used an 1inch spacer user my carb wth a vacuum port. If you have this particular line, and would like to sell it, please let me know. Vacuum modulator transmission vacuum line to carb diet. No pcv and two breathers makes for a crankcase pressure problem and possible oil leaks. Can I just do it this way with a T hooked up to the big port on the back of the carb? Browse Transmission Vacuum Lines Products. I also used the stock manifold port for my modulator line. 06-23-2016, 02:45 PM||# 17|. The big port on the back is being used by my th400 shift module, and I have the vacuum advance in the distributor hooked up to the small port under the throttle blades in front of the carb.
Is it even supposed to be down there? 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. Re: Where to hook up vac lines on new carb. "I ain't nobody, dork. Elderbrock 8096 it's available from summit, kegs, Amazon etc. I ground out a bit of the top of it to clear my Holley 3310 before I put a spacer underneath it. Vacuum line off Carburetor to Transmission? 63' Dynaflow 2 speed - Buick Riviera. Location: calgary alberta. If you run manifold vacuum to the advance, it will work, but part throttle driveability and fuel mileage suffers a little. Shafer's Classic Reproductions - Transmission Vacuum Lines. If so, it has a large hose nipple that will run to one of your valve covers. Last edited by 72 Super; 06-21-2016 at 08:33 PM. Where can the TH350 vacuum modulator line hook up to on the engine? Description: Turbo 350 modulator line. It's whay there is a hard line running down there from the factory.
Run which ever one your motor likes. You can search it to see a picture and infomation on it. I have a wanted ad on the site looking for the tee that goes into the back of the carburetor. Usually a big cam motor needs manifold vac. 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. Description: 350 V8. 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. Vacuum modulator transmission vacuum line to carb hose. If it can go to the carb does it need to be on full vacuum or timed vacuum? What type of intake are you running?
If full vacuum can I just put a tee in the distributor vacuum advance line? I have a 2 speed dynaflow. Link to comment Share on other sites More sharing options... Location: Winona Lake, IN. I found that OPGI (), however, this fits from 1962 to 1964 Hydromatic transmissions, and this car has the TH400 transmission. 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. 'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. Either a stand alone one or hooked to the air cleaner. Join Date: Jun 2005. The other valve cover will have the pcv valve, which should be hooked to the big port on the back of the carb. The other valve cover has a breather on it. 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.
The Rebuild of Creeping Death after the wreck. So I just got a new Holley 650 double pumper and it's almost 100% installed. That line is how the transmission knows how much load is on the engine, and how it decides when and how to shift. Well, some of you do! Location: Colfax California. Posts: 1, 248. the one on the valve cover should go into the air cleaner port. 73 "The Needy Beast". You need air into the motor to mix with the fumes and drawn out by the pcv. I have my PVC going to the port at te rear of the carb, my PB hose is going to the port on the carb spacer and my turbo 350 modulator vaccum is hooked to small port on passenger side of the carb. It's my first Holley so correct me if I'm wrong on the vacuum advance being plugged in UNDER the throttle blades on the front of the carb too please. Description: V8 4 bbl.
Quote: For the vacuum advance line, you want to grab ported vacuum. Are you running an air cleaner spacer? The transmission modulator vacuum line was cut and replaced with a rubber line from the carburetor to the modulator. 79 C10 LS swap - What do I do to the vacuum line to the trans? Without vacuum the transmission will think your foot is 100% on the floor 100% of the time. 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. Like geezer said, if the engine has a healthy cam, it will want manifold vacuum. There are a few good explanations available on the internet. I don't have power brakes or anything else to hook up, but the PCV from the valve cover has nowhere to go now.
Thanks for any help. I ve read where if the line isn t connected that it wears on the transmission. 72 Cheyenne Super (Purchased new by my parents in August of 71) Black and White. Deluxe Side Markers. Look at the documentation that came with your carb. I need to find a replacement line for this restoration project. Vac modulator wants manifold vac. Join Date: Apr 2014. Is it OK to put a T on the back so the shift modulator and PCV share the big back port? I know this is a little different than your set up, just giving you an idea. Description: Powerglide. Join Date: Nov 2015. Stockish motors run on either one. Location: Whidbey Island, Washington.
Description: Turbo 350. I was wondering if the line that was used on the 1964 cars would be the same as the 1965 Limo. Secondly, most "experts" suggest using manifold vacuum (under the blades) for distributor advance rather than "ported" vacuum. The big port on the carb is for the pcv from one valve cover. You guys got it all backwards! Join Date: Sep 2007. Either a manifold port on the carb or hooked to a vacuum tree on the intake.
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