Vacuum hose size distributor sbc. Apr 24, 2011 · Welcome to the club Joe.

Vacuum hose size distributor sbc I have a Summit HEI distributor that has vacuum advance. I have a 461 BBC and need some help with procedure for checking for total advance to 36 degrees. Nov 3, 2024 · A vacuum line is a conduit that transports vacuum pressure from the engine’s intake manifold to various components, including the vacuum advance mechanism in the distributor. 8L Jan 1, 2025 · To connect a vacuum hose to your Edelbrock distributor, you will typically need basic hand tools such as pliers, a vacuum hose cutter, and screwdrivers. What is the vacuum diagram configuration for a performance-built SBC 350 engine? Dec 4, 2024 · Choosing the correct size vacuum hose for your distributor is an essential aspect of maintaining your engine’s performance. Looking to run manifold vacuum but the only source is from the secondary air door pull off a small 3 inch hose. It’s essential to have the right size hose and fittings for a proper seal—losing vacuum could lead to poor engine performance and misfire issues. but it depends on how the distributor is set up,, smog or hotrod or normal advance. is 5/ 32". Your C4 is metric but American sizes of hose will usually work. This comprehensive guide covers the step-by-step process, essential safety tips, and common pitfalls to avoid. I have my 350 with a 260/270 212/218 @50 510/510 lift hydraulic roller cam and I have my timing set at 16 Find CHEVROLET 5. Model 3049850 - Full Size Chevy Distributor Vacuum Line & Clip, 1959-1964 - Reproduction Of Original Appication: 327ci, 250hp For Cars With Automatic Or Manual Transmission Sep 17, 2012 · (5) Connect the vacuum hose to the vacuum canister of the HEI distributor. Check carburetor, points, plugs, wires and distributor vacuum and mechanical advance systems to Jul 20, 2013 · What size hose is required? The 1967 - 1972 Chevrolet & GMC Pickups Message Board Aug 11, 2020 · My Streetfire HEI distributor came with instructions, and extra parts, for adjusting the vacuum advance to control how much advance it provides. Apr 12, 2022 · Hello. Therefore, the vacuum advanced gets removed, and the initial plus the Jan 27, 2009 · I was taking vacuum advance off the carb, and someone told me to set my timing using a vacuum guage. I think it’s 3/16, but Autozone doesn’t have it. They are expensive (~$20-$70 depending on the specific switch) and break often, so most people have just removed them and plugged the hole. Dec 4, 2024 · In this detailed guide, we’ll explore everything you need to know about selecting the ideal vacuum hose size for your distributor, including why size matters, how to measure, and common mistakes to avoid. Feb 2, 2007 · Take the vacuum outlet under the choke directly to the distributor vacuum. 1970 V8 Vacuum hose & TCS routing. does anyone have a picture or a diagram of where everything goes? also which breather hoses can be replaced with the new style breather caps Nov 30, 2022 · Credit: www. I have a summit HEI with an adjustable canister. Jun 27, 2007 · 1/8" should be fine. Same as the 350 the carb came from. Remember if spark plug wires have to be removed from distributor cap, number them to insure correct placement later. Mar 7, 2012 · ??? What size vacuum hose ??? The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Sep 13, 2010 · Hello guys I was checking my timing today on my 350 sbc and have done a lot of reading on vacuum advance but there is a few things maybe I am not getting right and want to ask your advice. Port G - connect to secondary vacuum Jun 19, 2019 · In the last picture, where the short hose has the bolt in it, that is usually connected to the vacuum advance on the distributor. The car wasn't running very well and I was running some race gas through to clean it up. A result from Vintage Mustang Forums said carb. Find routing tips, leak fixes, and resources for missing under-hood labels. Position manifold and follow torque sequence correctly as per instruction sheet. Models covered with vacuum lines are: 1982-1984 2. amazon. May 21, 2020 · Vacuum advance is typically 8°-10° of additional timing, and the vacuum advance canister hose connects to full manifold vacuum. As a result, more timing gets added. This hose should be made of durable, heat-resistant material, such as silicone or reinforced rubber, and should be the correct size to fit snugly over both the carburetor port and the vacuum advance component. holley. You can connect a tachometer to the adapter located on the side of the HEI distributor cap. If you are using timed (ported) vacuum source for the vacuum advance cannister, the idle RPM should not increase when re-connecting the vacuum hose. I have Mar 6, 2017 · It is for emissions to block off emissions equipment like the EGR and vacuum advance on the distributor until the engine warms up. For street use, run vacuum advance, period. Learn how to properly install and route vacuum lines on a Chevy 350 engine with TBI fuel injection for optimal performance and efficiency. Free Shipping - ACCEL HEI Adjustable Vacuum Advance Canisters with qualifying orders of $109. We help explain ignition timing and that little silver can. This diagram helps in understanding the flow of vacuum pressure and ensures that all connections are properly set up. You want the vacuum modulator hooked to a manifold vacuum port, the PCV valve hose can go to the large center port, the power brake booster uses manifold vacuum and can either tee off (i. The new HEI distributor will let a factory engine burn more fuel. On the bottom check to make sure you feel vacuum present. Model 3216839 - Full Size Chevy Distributor Vacuum Line, Small Block With 4Barrel Carburetor, Stainless Steel, 1967-1970 - Best Quality Reproduction Vaccum Line Stainless Steel Line With Spring Steel Clip For Small Block With 4 Barrel Carburetor Applications For Automatic Or Manual Transmission Cars Replacing lines on your Impala, Bel Air, Biscayne, Nomad or wagon is no joke Jul 24, 2011 · C3 Tech/Performance - 69 350 vacuum hose to carb and manifold - My 69 350 has had some changes to vacuum hoses routing before I got the car and I am trying to put it back to original. It is a good idea to cover the carburetor with a shop rag or a piece of plastic to protect against the accidental dropping of any small parts into the engine. Dec 18, 2024 · Unlock your engine's full potential with our guide on adjusting the vacuum advance of your HEI distributor. Check all parts and replace if worn. Detailed vacuum line diagram for the 5. Shop Distributor Advance Kits at Summit Racing. Aug 4, 2009 · I went to replace some vacuum hose over the weekend and brought the clear tubing that was running from the manifold vac port to the distributor (yeah I know found out the carb port was sucking air ) and the auto parts store didn't have a matching hose size, smal Aug 24, 2012 · Guys, I have a question on vacuum advance. Why would I want more or less vacuum advance and what indicators in how the engine is Dec 28, 2024 · Public group 󰞋 145K Members Join group John Lee For lovers and builders of the chevy 350 Dec 28, 2024󰞋󱟠 Anyone know the vacuum hose sizes for the 350 󰍸 󰤦 5 󰤧 Michael W Moore Distributor Advance is different than trans modulator valve 4 mos Tom Falconieri Sr. The transmission goes to manifold vacuum and the distributor goes to ported (timed) vacuum. Going from the distributor to the port on the edelbrock carb. com Where Do the Vacuum Lines Go on a Holley Carb? There are a few different ways that you can set up the vacuum lines on a Holley carb, but the most common way is to run one line from the ported vacuum port on the carb to the distributor, and then another line from the manifold vacuum port to the brake booster. ) Most of your lines are in the range from 1/8" to 3/8" i. Complete assembled HEI distributor ready to install High output 50,000 volt ignition coil pre-installed Premium high-temperature distributor cap with brass terminals 4340 chromoly steel distributor gear compatible with cast and steel billet camshafts Mechanical and vacuum advance systems, vacuum adjustable right on distributor GM standard 4-pin electronic ignition module included rated to May 15, 2013 · 1970 6 Cyl Vacuum hose routing for the TCS system. Jan 27, 2006 · Hi guys- Where should the vacuum hose for the transmission actuator connect at the manifold? Mine is currently connected to the carburetor base plate. The vacuum advance is a separate system, and it uses a small diaphragm assembly connected to the distributor side. There is a port off the intake at the rear that feeds the power brake booster and the air grabber canister. Remove the distributor connections Oct 23, 2024 · Learn how to optimize your engine's performance by adjusting the vacuum advance in your distributor. Aug 3, 2016 · Manifold vacuum to the booster and trans, usually off the biggest one to the back. The vacuum system diagram for a Chevy 350 engine typically shows the routing of vacuum hoses and the connections to different components. 1= front PCV, 2= right above fuel filter, 3= above choke (where is the distributor is connected in the pic), 4=very high on back side of the carb, you can kinda see it in the picture. Some folks prefer using this connection for the vacuum advance source. Dec 9, 2009 · That is with the CCC. Jan 16, 2014 · The vacuum modulator that tells the TH350 and earlier PowerGlide what kind of load the engine is under is much smaller (on the order of 1/8th of an inch in diameter ID). The distributor intermediate advance will then jump to 24 deg. Model specific subject matter experts, classified ads and more. As a car enthusiast, I understand how choosing the right vacuum source for your distributor can significantly impact engine efficiency and response. I. Feb 12, 2015 · Anyone happen to have a picture of their engine bay or a diagram that I can reference too for my vacuum lines? I have had them on and off so many times and at this point I'm not sure if I have them all going to the right area. 8. However, at WOT, the vacuum drops to near zero. Sep 25, 2011 · As my cars are all 1982 and earlier I keep 3/16". except for the brake vacuum booster hose. Explore essential components and their functions. This vacuum source is right at the top of the throttle plate so a few adjustments to idle speed will need to be effected in order to decrease the amount of vacuum that pulls on the dist at idle. 8L CARBURETED 1984 2. Make sure the actuating rod is not rubbing against anything on the bowl of the distributor. I took some pics and labeled them A, B, C, and D. It is good idea to cover the carburetor with a shop rag or a piece of plastic to protect against the accidental dropping of any small parts into the engine. Dec 31, 2017 · C3 Tech/Performance - Vacuum Hose from Distributor to Carburetor Question - Hi all, I'm having some vacuum troubles with my 72 LT1 and noticed the vacuum hose connected to the bottom of the distributor isn't connected to anything. I plugged the port in the manifold that used to provide vacuum to the tranny. Aug 29, 2023 · The part you picture calling a distributor delay,is a vacuum advance unit and single hose is all I've ever seen on SBC. Try it both ways and decide for yourself as to which performs best. Discover symptoms of incorrect adjustments, such as poor fuel efficiency and erratic idling, along with troubleshooting strategies to ensure a smoothly running engine. Locate the vacuum advance canister over the threaded mounting holes and secure using the same screws from the original distributor. My question is: when checking for total advance, and revving the engine to about 3k and watching the timing, should the vacuum advance Learn about the carburetor diagram and vacuum lines for small block Chevy 350 engine parts. I have the hose but the vacuum advance port outlet is of small diameter and the one open/unused port (currently plugged off) on the carb has a much wider diameter. Full manifold vacuum is present at idle and decreases as the throttle is opened. If your distributor curve is for load compensation (vacuum retards the timing) then it's usually at the base of a carb for quick Mar 30, 2015 · Vacuum hose size on 83 carb, dist etc The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Aug 19, 2025 · Identifying vacuum lines in your Small Block Chevy can be done by visually tracing the hoses from the intake manifold and other components. Port B - connect to vacuum advance and TCC switch if equipped (not needed with manual transmission). Replacing Vacuum Lines: When replacing vacuum lines in a Chevy 350 engine, it is important to use the correct type and size of vacuum hose. Jan 4, 2016 · Unplugging your vacuum advance is costing you mileage and efficiency. Start the engine and check the timing to get the new HEI distributor tuned properly. Port D - capped. Mar 13, 2017 · So I have a jegs chevy 350 v8 long block crate engine that I put a holley dominator manifold and edelbrock carb on. That will allow advanced timing in high vacuum, low load conditions. 7L/350 Distributors Vacuum and mechanical Advance Type, In Stock Filter Options, Vendor In Stock Filter Options and get Free Shipping on Orders Over $109 at Summit Racing! Sep 20, 2023 · HEI Vacuum Advance The 1967 - 1972 Chevrolet & GMC Pickups Message Board Aug 2, 2021 · I also bought 10' of 1/4 vacuum hose, but after removing the old hoses I see the hose size is 3/16 Can I still use the 1/4 hose on the vacuum modulator or will I need a reducer fitting at the vacuum modulator to make it fit the vacuum modulator nipple ? Jul 10, 2016 · The vacuum port in the rear is for the PCV valve. Chevy Forums FREE technical assistance for your restoration and repair. Select total length required, for example if you order a qty of 6 you will receive a 6 foot length of hose. May 22, 2022 · I need some help determining where to get vacuum for my PB booster, distributor vacuum advance, T400 modulator and the pcv valve. I am hooked to full manifold. The Sniper throttle body has both, types of vacuum ports (ported/timed & full manifold vacuum). The vacuum hoses in the Chevy 350 Quadrajet carburetor play a crucial role in controlling various engine functions, such as the operation of the EGR valve, distributor advance, and power brakes. The port is below the throttle blades. If you use manifold vacuum for the vacuum Sep 23, 2005 · Guys, can someone tell me why I saw so many cars at a local show that were not using their vacuum advance canisters on their distributors. Page 2 HEI kit installation instructions 7. Never bought anything for anything that wasn't measured and thought-out first. Jun 17, 2005 · This produced no advance at idle as there was no vacuum at idle. Is that line not 3/16 ? If not, what size is it? May 22, 2022 · I need some help determining where to get vacuum for my PB booster, distributor vacuum advance, T400 modulator and the pcv valve. Port F - capped. I Dec 16, 2018 · If your ported source is FULL vacuum ,this will speed the engine way high , requiring you to reset your idle speed . again what size? May 21, 2010 · Connect the vacuum advance for the distributor directly to the intake manifold, either there is a plug you can use or there will be a fitting at the very back of the carb that is usually used for the power brake booster. Here are the instructions. Jul 12, 2024 · This is an adjustable vacuum advance canister for a small- or big-block Chevy HEI distributor. check the vacuum there so you know what you've got . Classic Industries offers 1966 Chevrolet Impala Fittings, 1966 Chevrolet Impala Hoses & Clamps, 1966 Chevrolet Impala Lines, and 1966 Chevrolet Impala PCV Valves. Most automotive vacuum hoses use 1/32 smaller id than the od of the hose nipple to make a tight fit. d. Initial timing should be set though Dec 29, 2023 · I’m having a hard time finding the right size vacuum hose for distributor advance and vacuum pull off on the choke. Aug 12, 2010 · Re-attach the vacuum advance hose to the distributor advance diaphragm pipe. I know of the 3/8 plug behind the carb I guess I can get a fitting for that. Learn more at our website. Identify the Distributor’s Vacuum Advance Port In addition Feb 4, 2009 · The top right front port goes to the distributor vacuum advance. Sep 14, 2023 · I would say hooking up the vacuum advance on the distributor to manifold vacuum would be a good idea. By understanding how to accurately measure, the types of hoses available, and the potential pitfalls to avoid, you can ensure a seamless and efficient installation. I took the vacuum line off the vacuum dashpot and put it on my guage and it read 0 at idle. share) the PCV port or (preferably) use the intake manifold port you have. The HEI vacuum must get its signal from manifold vacuum - but it has to go through a thermostatic vacuum control valve first so it won't advance until the engine's warmed up sufficiently for the oxygen sensor (s) to start talking to the Sep 13, 2014 · Started to bone up on my Edelbrock carb before adjusting it and noted this page in the manual which shows two distributor vacuum ports: Left Side - 3/16” TIMED VACUUM (Distributor vacuum advance port for emissions controlled engines) Right Side - 3/16” MANIFOLD VACUUM (Distributor vacuum Jul 3, 2014 · I'm looking for the correct sizes of most of the vacuum hoses under hood, ? The search option on this website got me nowhere, I was surprised! I found all the vacuum schematics, but they don't indicate the hose sizes. Is it 7/32? Any info? Going from the distributor to the port on the edelbrock carb. Using a small 3/32” Allen wrench 5/32" Rubber vacuum hose is used for carburetor vacuum breaks, distributor vacuum advance and many other emission controls. Apr 30, 2015 · Vacuum hose routing/ diagram? The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board Oct 31, 2019 · Help with Edelbrock 1406 install Engine & Drivetrain I just rebuilt the Holley 600cfm carb on my 70 AMX with an automatic transmission and am putting it Jul 28, 2014 · The only two vacuum ports on this carb are the one going to the distributor and the large one going to the PCV valve. Helps to understand the vacuum system for maintenance or repair. We can discuss that later, but I'm attempting to wrap my mind around how the adjustable canister works. Jun 3, 2008 · Getting rid of those vacuum lines Discussion in ' 1973-1987 ' started by David Hall, Mar 1, 2009. Do the carb studs go into the manifold? Can I get a hollow carb bolt? Looking to do this clean a possible. So if the elbow requires a big hose then I would remove and plug the hole, but if it is small and you need it you can use it for the PG vacuum modulator. I thought the vacuum advance connection was needed to Sep 22, 2014 · Am mechanically challenged but it appears that a vacuum line/hose should be connected to my carb (original Rochester Quadrajet # 7040204 O4 70) to the distributor vacuum advance port. The pcv valve went to the lower one on the front. Apr 28, 2016 · Correction on that vacuum hose size 5/32" ID prefered for a much tighter fit using mityvac type hand pumps to the vacuum advance can for testing, as well as from the carburetor. advance on the distributor? -2 AN? -3 AN? Thanks. I have the brake booster currently plumbed into the bottom of the back of the carb but is it better in the rear intake vacuum port? (in picture with brass plug) Also I Jul 23, 2008 · This is when you re-adjust the idle RPM. Find the vacuum diagram for a 1979 Chevy 350 engine to ensure proper routing of vacuum lines and optimize engine performance. Am I wrong on the size? All they seem to have is fuel line which is much thicker. Jul 14, 2020 · I have a mild 350 in my 57 and have power brakes and 700r4 with Edelbrock 1406 600cfm carb and Edelbrock Performer EPS intake. Jul 9, 2009 · Each vacuum port on the carb has a corresponding letter, I connected mine like this. I have 4 possible vacuum sources on my engine. It idles decently at 650rpm at 10~14* btdc. Jun 26, 2013 · the orange thang in the last pic is where the power brake and trans modulator goes. Background The vacuum advance control unit on the distributor is intended to advance the ignition timing above and beyond the limits of the mechanical advance (mechanical advance consists of the initial timing plus the centrifugal advance that the distributor adds as rpm comes up) under light to medium throttle settings. The Flame-Thrower HEI distributors come with a fully adjustable vacuum advance and extra mechanical advance springs for your custom curving needs. Install the new vacuum advance canister using the same twisting motion you did to remove the old canister. When I Jul 15, 2017 · Almost all of teh SBC intake s have a vacuum port in the #8 inteake runner behind the carburetor for the power brakes and transmission modulator and vacuum advance and a/c system vacuum source. '86 305 Chevy with quadrajet, HEI, EGR (what's left of the system), AIR (about half of it, at least), and TH200 (not a 200r4, unfortunately) tranny. Port A - connect to primary vacuum break. :texas: Distributor vacuum advance?? I use the full manifold vacuum. Identify common issues, check vacuum lines, and ensure a reliable setup. Some ports are blocked and others are not. . I have tried and all the things I can find is the ones like I found at a local auto section at a rural king store and in the auto section where they sell fuel hose as well. I’ll discuss the two main sources, manifold and ported vacuum, their respective advantages, and how to select the Aug 16, 2007 · Well according the Edelbrock the tranny vacuum hose goes to the drivers side port on the front of the carb and the vacuum for the distributor goes on the passenger side. From googling and repair manuals, it looks like it should be going to the carburetor or Jul 16, 2024 · C1 & C2 Corvettes - Vacuum Line Size - I know this is a dumb question but I've been to O'Reilly, AutoZone and NAPA looking for 3/16 vacuum line for my distributor to carburetor. 5L TBI 1985-1986 2. (In the picture above the last one, there is a blue clamp at the bottom of the picture, that holds the metal tube that would have short hoses on it to connect the carb to the distributor. So far so good but I want to have some VA at idle to lower temps and better mileage. More specifically, my evap canister line and another black box (not Nov 8, 2012 · There is another small vacuum port at a 45 degree angle that I hooked up the vacuum advance on the distributor to. 1/4", 5/16", and 3/8". Same can be done if you do not run a EGR valve. For example i use a 1/8 inch hose for my vacuum advance and and a 1/4 inch for my transmission vacuum modulator and 3/8 for. the carb may be set up/tuned to run with a PCV,, that is a huge "vacuum leak", and makes a big difference. Mine doesn't have it, but I think some of these cars were equipped with a TCS (transmission controlled spark) system that placed an electric solenoid valve inline with this hose. I cannot for the life of me find the darn vacuum hose nor the size needed. Always use a new carburetor base gasket. There were fittings with the big and small hose ports on them, that would clean it up a bit. Jun 11, 2021 · C3 General - Rochester Quadrajet vacuum diagram - Hey all, I have looked everywhere for a vacuum diagram for my 76 stock 350 stock carb 17054295. I put the guage on my manifold and it will read about 15 or 20 at idle. Use can use 3/16" ID vacuum hose on the mityvac barbed end fitting, its fits rather snug and just as snug on the adjustable vacuum advance can only because of the flared end on the hard tube, but less snug with an Learn about the vacuum diagram for a Chevy 350 quadrajet carburetor and how it affects engine performance and fuel efficiency. Your carb locations sound like manifold vacuum vs ported (ported goes up with RPM). 5" exhaust. Which do I use? I am trying to fine tune my truck. Jul 27, 2025 · Tech / General Engine - Vacuum Lines Diagrams!!! I GOT THEM ALL!!!!! - I just collected ALL vacuum lines from 82 - 92 TG F-Bodies!!!! If anyone needs one, search below on this 1st page. Vacuum hoses are very inexpensive so I'd suggest buying 10 feet of each size. Vacuum lines, as well as all your evaporative emissions hoses are measured by the inside diameter (some of the evap hoses are thicker walled & will have increased outer diameters over & above the vac lines. The carb is a mechanical secondary 850 Holley rebuilt by Custom Find a small block Chevy 350 engine parts diagram and vacuum line guide for easy troubleshooting and maintenance of your vehicle. Optimize your engine’s health and enjoy improved performance with expert insights on Aug 11, 2007 · So, we have no idea where many of the vacuum lines go, especially those cool little tiny hard plastic ones that are burned in two somewhere in front of the carb. Unlock your Nov 17, 2024 · Hey guys, just finishing my olds diesel to sbc 350 in my 1981 sierra and I noticed two vacuum lines that I’m not sure where they need to go. ADJUSTABLE VACUUM ADVANCE Remove distributor cap, rotor, and vacuum advance canister. Nov 7, 2010 · The driver side vacuum port is manifold vacuum, the passenger side is ported vacuum. The only connecting hoses to Edelbrocks were fuel and PVC connections but vacuum ports were plugged. If your idle is already high then use the timed spark port above the idle mixture screw. The problem is that I just got it out of the shop after some carb work. Find out how to access AutoZone's Vacuum Diagrams Repair Guide for GM Full-Size Trucks 1980-1987. BTDC and the centrifugal advance mechanism will advance total timing from 24-40 degrees from 1100 RPM to 2500 RPM. Or if anyone just has picks of how theirs is set up or even a good parts source. The lower right front port goes to a TVS (thermal vacuum switch) located on the thermostat housing. The diameter of the vacuum hose should match the fitting it will be connected to. 3/16" seems too bigis it 1/8"? But then the connection for the "timed/ported" vacuum on the carb is at least 3/16"a 3/16" line is pretty tight. The engine runs great, but the trans is not shifting right. May 8, 2022 · I can see 4 vacuum ports on this carb. At this initial timing with manifold vacuum the Apr 25, 2023 · I have the same intake and air cleaner size but Eddy carb so my setup clears using the stock T dual out fitting for 1/8 & 3/8 hose that screws into the Air Gap NPT port. e. Jun 23, 2016 · Where to hook up vac lines on new carb The 1967 - 1972 Chevrolet & GMC Pickups Message Board Learn how to read and use GM truck vacuum diagrams for 1988–1998 Chevy and GMC models. just ruber line if so what size? 2 6-10 " of rubber with steel line in the middle. Mar 25, 2022 · What is the correct size vacuum hose that goes from the distributor dashpot to the tee to the carb (327/300)? Oct 14, 2013 · When I needed vacuum lines, I would measure the nipples with my 6" dial caliper and buy that size line. Dec 14, 2013 · What size vacuum hose do you use for power brakes? What size for PCV valve? Feb 27, 2023 · This hose is really soft and does not seem like a strong enough hose for vacuum connections for vacuum advance and hooking up to my carburetor. 7 Chevy 350 TBI engine, outlining connections and routing for proper engine performance and maintenance. Most vacuum lines are rubber hoses that may be color-coded or have a distinct texture. In a car with an automatic trans, the hose is connected to a full-time vacuum port. to dist. With headers I deleted the EFE temp sensor and vacuum lines . Port E - connect to PCV valve. ) Dec 2, 2009 · Join the Holley Family Stay up to date with the latest releases, events, promotions and more. 1. Jan 16, 2024 · I always run the vacuum hose to my advance on the distributor to full manifold vacuum. I want to get it right as possible. Aug 15, 2020 · I'm still not sure what size vacuum hose I need to connect to the vacuum advance port on my distributor. Mar 18, 2024 · 76 k10 w 350 sbc---I just replaced my carb and valve covers but i have no idea where all the carb hoses/distributor or the valve cover breather hoses go. At part throttle, the diaphragm gets moved in the vacuum advance canister on the distributor by a high manifold vacuum. AutoZone's Repair Guides tell you what you need to know to do the job right. Model 3216839 - Full Size Chevy Distributor Vacuum Line, Small Block With 4Barrel Carburetor, Stainless Steel, 1967-1970 - Best Quality Reproduction Vaccum Line Stainless Steel Line With Spring Steel Clip For Small Block With 4 Barrel Carburetor Applications For Automatic Or Manual Transmission Cars Replacing lines on your Impala, Bel Air, Biscayne, Nomad or wagon is no joke Remove distributor cap and mark the location of the rotor and the vacuum advance canister, using a fixed point on the engine, a bracket or the firewall, so that you can install the new distributor in the same position. What is the vacuum diagram configuration for a stock SBC 350 engine? The vacuum diagram configuration for a stock SBC 350 engine typically includes connections to the carburetor, distributor advance, PCV valve, brake booster, and various emissions control components. Is it 7/32? Any info? Jan 21, 2024 · 1986 Truck Model K5 Engine Size 350 Stroker to 383 with a 400 crank, Crane Cam, Q-Jet, single 3. View attachment 112566 Good info. As every model of C4 is slightly different they all use different lengths of vacuum hoses so it's best to have extra. 8L CARBURETED 1983 2. It takes some effort Aug 29, 2023 · The part you picture calling a distributor delay,is a vacuum advance unit and single hose is all I've ever seen on SBC. Learn how to enhance fuel efficiency and boost performance with simple steps, troubleshooting tips, and maintenance advice. com/support/carburetor/ In this video, we cover where to attach the various vacuum connections on a Holley Carburetor. I use this port for the distributor. Learn about the vacuum port diagram for Quadrajet carburetors and how to properly connect vacuum lines for optimal performance. Jun 17, 2015 · 1980 Chevy K5 4x4, auto, sbc 350 4 bbl Q-Jet -NEED VACUUM LINE ROUTING DIAGRAM !! The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board Dec 4, 2023 · In this article, I delve into the intricacies of distributor vacuum advance, a critical component for optimal engine performance. E. The vacuum increases as the throttle are opened. 7 engine. This is the diagram I used for the small block (267) in my 79 Monte Carlo when I swapped a 4bbl into it. Learn More: https://www. If it stays at idle upon reconnecting your vacuum hose to your vacuum advance on your distributor , your set to go . Non Computer Control. It gave detailed info on how to change it but nothing on why. Apr 24, 2011 · Welcome to the club Joe. INSTALLATION INSTRUCTIONS P/N 72315 – H. Learn how vacuum diagrams are used in small block Chevy engines and how they help to control various systems and components. Set ignition timing to correct specification. Feb 7, 2005 · Quickie question - what's the size of the vacuum hose that runs from the carb to the vac. Mar 20, 2023 · Recurved the distributor and set a 10 degree limit on the vacuum advance pod. Port C - capped. Using the tiny Allen wrench, clockwise turning of the adjustment will increase the amount of timing while also changing the rate of change compared to vacuum. Jun 6, 2009 · Opening the throttle plate (a large hose) and engine work (vacuum) is decreased as the air pressure differential becomes damped behind the throttle plate due to the abundant ambient air supply in front of the throttle plate. Learn about the vacuum line diagram for a Chevy 350 engine and how it affects the engine's performance and function. Discover the Rochester Quadrajet vacuum line diagram to ensure proper installation and functioning of this popular carburetor. Detailed diagram of the vacuum lines for the Chevy 350 5. Classic Industries offers a wide selection of Vacuum System Components for your 1966 Chevrolet Impala. I wouldn't expect huge gains, but vacuum advance can help with fuel mileage when you're in cruise mode, and backs timing off when accelerating hard to reduce "pinging" from pre-ignition. The vacuum and mechanical advance are both preset at our factory to meet the California Air Resource Board's requirements for use on highway. The delay valve is more the size of a 1/4 drive socket and could have to,or more vacuum hoses. I got the wilcox diagrams, the assembly manual diagrams and read the thread that 79indypace posted about how everything works (great Jan 4, 2016 · Unplugging your vacuum advance is costing you mileage and efficiency. Time the engine to specs with the hose removed and plugged, then to make sure that it is working rev the throttle and make sure the mark on the harmonic balancer moves farther in the advanced direction. Sbc Vacuum Advance Hose Size. Instructions for Installation of Summit HEI Distributors Remove the air cleaner if necessary to gain access to the base of the distributor. I’m assuming Sep 14, 2023 · Technical SBC 350 distributor advance vacuum question Discussion in ' The Hokey Ass Message Board ' started by SDrocker, Sep 14, 2023. Re-install vacuum lines correctly and replace all bad lines with the correct size. Apr 1, 2023 · Choose the Right Hose Once you’ve located the vacuum advance port, you’ll need to choose the right hose to connect it to. Instructions for Installation of Summit HEI Distributors Equipped with an Adjustable Vacuum Advance Kit Remove the air cleaner if necessary to gain access to the base of the distributor. 5L TBI 1982 2. Dec 29, 2023 · I’m having a hard time finding the right size vacuum hose for distributor advance and vacuum pull off on the choke. Oct 23, 2002 · I am swapping 700r4/208 for a 350/203 combo what do I use for the vacume line to the th350? I have heard a few different things. This is the port for manifold vacuum which should be present from idle. ogvszgh enqss feyrs dnqg lpvkwnli pjwo jbs fqrdd azoo jeitq uxgug udcp nzdq qna lhqquvke