The Quadrajet to Edelbrock carburetor swap - step by step
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- čas přidán 25. 01. 2015
- Replacing my old Rochester Quadrajet with an Edelbrock 1406 carburetor. This is a 1984 Chevy K20 3/4, just a yard truck for plowing my property. The old Quadrajet got gunked up from a broken fuel filter so I decided to try swapping on this old Edelbrock. I had pulled this Edelbrock off an El Camino with a 305 I had about 10 years ago and it has been sitting since. I popped the top and cleaned the inside, also flushed the passages with carb cleaner. Seems to run well.
The Edelbrock 4bbl is not a direct bolt on to the stock intake manifold. It has a slightly wider bolt pattern and the shape of the openings is different. To facilitate installation I bought the Edelbrock adapter kit model 2696 which was less than $30. It includes the adapter plate, two gaskets, and mounting hardware.
I also purchased for about $8 the Edelbrock 8009 throttle cable adapter kit which allows the stock GM throttle cable to interface easily to the Edelbrock caburator armature.
The biggest adaption here was the fuel line. The Rochester Quadrajet has the fuel filter in the the front of the carburetor and is fed by a metal fuel line that threads in there. The Edelbrock's fuel inlet accepts a rubber line and is on the side towards the rear. I cut my metal fuel line and attached a rubber line to it with an inline fuel filter to the Edelbrock 1406. This seemed to work very well.
I had to extend my PCV hose about an inch. This was easily done by cutting it and splicing with a piece of metal tubing. The brake booster vacuum line on the rear of both carbs is identical and required no modification. Same with the distributor vacuum advance, same location on both carburetors.
Parts Used:
Edelbrock 2696 adapter plate kit
Edelbrock 8009 throttle cable adapter
Rubber fuel line
Inline fuel filter
Hose clamps
Tools:
Flat head screwdriver
Phillips screw driver
5/8" tubing wrench (fuel line and brake booster fitting)
1/2" wrench (carb mounting bolts)
3/4" wrench to swap brake booster fitting
Something to cut fuel lines with - Jak na to + styl
Great video. Straight to the point without long scenes and unnecessary words. Thanks for editing it and leaving out things every second of the process.
+!a
8 years ago.. hopefully you’ve still got this nice truck. Thank you so much for your detailed video, it really will help me, I’m in stalling a 1400 (similar to the 1406, but the california version), and I will use your video to help me do my install. Thank you so much. have a great Christmas.
Edelbrock makes a "Performer" Quadrajet replacement that is an exact fit spread bore so no adapters etc. Those are about $400 and work almost perfect right out of the box. Not the budget route but for a replacement idea likely the best. Those Quardrajet carbs are rebuildable, not everyone is good with them however, and they will give the best overall reliability.
I wasn’t expecting to find this gem while shopping for carburetors, but it helped immensely that I found someone with the same truck I’m working on to show me what to look for and do
i dont mean to be off topic but does any of you know of a tool to log back into an Instagram account?
I stupidly lost the login password. I would appreciate any help you can offer me!
@Heath Erik instablaster =)
@Troy Lorenzo thanks so much for your reply. I got to the site on google and I'm waiting for the hacking stuff now.
Takes quite some time so I will get back to you later when my account password hopefully is recovered.
@Troy Lorenzo it did the trick and I finally got access to my account again. I am so happy:D
Thanks so much you saved my account !
@Heath Erik No problem :D
Great video, this will come in handy when do the same swap on 85' Silverado. Thank you for posting such a detailed vid!.😃
Well fucking done. Your energy towards the whole process really put a smile on my face. Kickass visual presentation as well. Not once was I lost with what you were talking about.
You do a very good job of explaining this process, thanks a lot for the informative video! I know next to zero about working on cars and I'm trying to learn as much as I can for an upcoming 60's Chevy Van project, this was very easy to follow for a car-dummy like me, your channel is going to be a great resource!
Quadrajets are great carbs when they are new and/or working right... However as a mechanic I mostly saw them when they were old and crusty and no longer working right. We used to call them Rottenchester Quadrajunks. I LOVE the AFB, Carter/Weber/Edelbrock carb. My first experience with one was a old Carter AFB that had been mounted on a Ford small block in a boat. The boat had sunk, the manifold (with AFB on it) was left sitting outside for YEARS. I pulled the carb stuck a carb kit in it and slapped it on a crappy running C10 that had a worn out Qjet on it, the truck ran GREAT after that! I couldn't tell you how many Quadrajunks I have replaced with them since then.
Quadrajets are awesome carbs if you,or a mechanic,are good w adjusting them. If the people workin on them are junk,then that's where the quadrajet gets their name
@@M4MED86 I have been rebuilding them for yrs never a problem ,trik em out extra what's wrong w this lazy world
@@M4MED86 They are good but are much harder to tune than the Edelbrock in terms of being as easy to take them apart plus they are a little easier to get jets and tuning parts for over the quad and it's easy to get either the tuning manual or the PDF to tune them for your needs or for Dyno purposes while it's a little hard with the Qjet. The other thing is the Quadrajet is also known for those crappy Welch plugs in the bottom of the float bowl that have lead plugs in them that shrink over time just like mine are doing now and other quads I had many years ago which causes a flooding after it's been run and warmed up good and that flooding also washing the oil off of the cylinders walls which isn't good either ! I like them when they work but once they hit that tipping point of leaking fuel and the throttle shaft bushing go bad they suck and that's what I like about the Edelbrock they don't have those Welch plugs below the fuel bowl to leak and usually don't unless you got one that was a bad porous casting that got by inspection ! Really the best way to fix those plugs is to drill them out then thread them to use set screws cut down then use some permatex cylinder liner adhesive that's commonly used on diesel engines with cylinder liners to help hold them in so those damn pesky set screws won't ever leak or come loose like the factory lead plugs do but most people either don't know how to do it or it's just not worth the time to do it and just buy another carburetor instead lol . I am throwing on a Edelbrock today until I can take a closer look at my old Quadrajet because it's been leaking fuel and I think the bushings are gone now because the idle is up and down at times but hey it's been on my 400sbc for 20 years in 2 plow trucks and had been good until recently now that I built a new plow truck that can be driven anyplace now so it's had a lot of sitting time outside although I would start it every 2 weeks just to throw a charge to the batteries and keep the fluids moving and carburetor wet so I can't really bitch lol.
This video was very helpful when I upgraded my Edelbrock from the 1406 to the 1906 AVS. Very good job in providing the details. Thanks!
What is the difference between the two?
What difference did you see?
thank you for going step by step. really helps in my situation
I put an edelbrock on my 1987 F 250 351-W 5.8 L had to re jet and change metering rods till it leaned it out enough to run properly , It was running way to rich ( To much fuel), Carb comes with a manual it explains how to do it , Tip chilton manual explains rich and lean condition for fuel and how to check ,Good luck and most of all have fun while doing it cause satisfaction when done is all worth it !!!
Nice job and the choke works too! Sweet
Great video! Simple and to the point!
This video was a lot of help thank you
Thanks a ton i'm going to be doing this to my 84 chevy c10 scottsdale.
Great! i am about to do the same conversion on my 86 pontiac parisienne
Thank you, very useful and detailed video. Learned a lot from it!
Thanks for the part number ...lots of help
nice. I just took off the Rochester quadrajet off and installed a edelbrock onto a 305 powered 1985 Chevy Scottsdale wrecker. Didn't film it running yet but I got a couple parts of me messing with it on my page.
How Big was the edelbrock u put on?
It works it work great video man stay warm up there
Thanks for posting this video. I have a 1984 Trans Am and the ex owner told me to get this carburetor. I think its more of a head ach, because i want to run the stock air cleaner so i can use the Cowl induction. Thanks again.
Great Video sir. and easy to follow.
haha funny i got my old 82 GMC Jimmy that im doing the exact same thing for my old rusty Jimmy i love it for plowing my acreage driveway and bin area. My carb should show up this week i cant wait
Wow! This guy has great diction. I love listening to him. Some of these youtube videos sound like Nascar drivers after a whole night out drinking!
how did u run the wire on the electric choke to the ignition
The truck im about to buy has a edelbrock carb & performer intake. I like when you plow your snow at 60 mph with your Dukes of Hazard shirt on.
Great video sir!
Thanks for the help buddy
Thank you for the video it was really helpful .
nicely done with the video!
Great stuff, I'm having the 2 barrel on my Pontiac 350 replaced with this Edelbrock. Now I know exactly what the mechanic will be doing!
You will just need a different adapter. Check with the Edelbrock guide for the adapter needed for the pontiac intake.
How did the tv cable for the transmission link up to the edebrock?
Great video and thank you for being detailed!
I just bought a Mr gasket carb adapter but I'm confused because they only come with 2 stud bolts do you know why not 4? it comes with all other hardware but just 2 stud bolts
You did not say what size rubber hose you used to hook up fuel line. I have a 1985 C10 than has a leaky fuel line need to replace?
From where did you get the 12V supply to the electric choke? Manual says not coil of alternator
I agree with the others here about the author explaining things in an intelligent and expedient way without all the flimflam that I see from most people on CZcams. Would make a great teacher.
I know there's people out there with their own preference. i understand that,but the ol' cliche of swappin a QJet w an eddelbroke or a holley is just that...a cliche. QJets are great carbs if you,or a mechanic, understands them. I had the same QJet on my truck for over 13 yrs and it did good,until a "new school" mechanic that "knew what he was doin" messed it up. Since then,i had another QJet(period correct)rebuild by someone who knew what they were doin and w the regular half pump of a cold start,it fires up in bout 2 secs....and that's w temps bein in the low 30s. My old QJet did that also,until the "new school"mechanic messed w it
north central ohio An Edelbrock is far superior to a quadrajet. It's not a matter of "new school" it's a matter of it being a better part.
@11second69nickeynova Isn't it a shame that some people dont know any better?!😂
@@bobfalfa76 🤣🤣🤣 ... edelcrock is a joke compared to a Qjet... there is a good reason Qjets are on a million cars and edelcrocks arent...😉
@@sierraridgereaper Yeah because they came on damn near everything from the factory, and were quickly replaced by either a Holley or Carter(same thing as the Edlebrock) An Edlebrock carb out performs a Q-jet at ever turn. common knowledge.
I just bought a 1406 for my 86 square body, do i have to use an adapter plate ???
if i have a chevy C10 1981 6 cilynder, can i use use this type of carburetor and if i must buy all the adapters?
Good stuff man, thanks!
Cool stuff. Very helpful.
Great video!
Those little glass fuel filters are dangerous. I was working on my carb with the air cleaner off and it coughed up fuel and started a small engine fire. Before I could get it out the heat cracked the glass fuel filter and sprayed fuel all over causing a huge engine fire. I almost lost the whole truck, the engine bay was a right off. Those glass filters should be outlawed!!!!
Were you able to use the stock air cleaner assembly..I heard you can use a spacer to install stock air cleaner.
I swear I love CZcams! Extra awesome video bcz this the exact,exact swap I'm plannin to do. Thank you sir!
have you got around to this swap yet?
Corey Champion No not yet. I was able to get the Quad adjusted and running smooth.
Chevy Kev for a day or two....screw quadrajunks
How was your hood clearance after the swap?
No transmission lockdown cable?
nice step by step video....
That’s really cool.
Did you use an egr cover plate?
Thanks for the video it was a great help.....
nice video. The Edelbrock carb sure looks like a Carter AFB from back in the day.
It's just an Edelbrock name tag
If I remember right Edelbrock just buys the patents and sticks their name on it.
@@SOU6900 No they own the rights to Carter now & own the tooling to make them but they are almost identical to the old Carter but now have the Edelbrock metal tag riveted to the front of them . Supposedly they did some upgrades to the inner low speed circuit to improve throttle response . I have had a few of them through the years & not one of them ever gave me problems unless it was one I got that sat for many years with old fuel in it that caused the accelerator pump to get hard & shrink . They are supper easy to work on rebuild & tune but for all out drag racing your better off with a Demon or Holley double pumper race or Dominator just for the fact that they can be tuned more than any other carburetor out .
Carter is the same thing as a Edelbrock they just are not chrome plated.
E Brock bought out Carter
What's your plan for that Q-Jet?
Great video guy..🖒🖒
Hello, I'm looking for that part where you hook up throttle cable with the cotter pin. Cable is the same edelbrock 1406
Would this be the same for a 81 impala with the 305?
Is this the same for a 1978 k20?
Did u use the org throttle bracket
what about Transmission detent cable?
YOU ARE AWESOME !
Ur stock throttle linkage worked on that?
Thanks, Video helped a lot. Cheers
Great video been looking for this video great information
Awesome. Video. Thanks
Great info 👍 thanks
great video bud....
No mention of the open port in the back of the adapter.
Nice video thanks!
Is this mechincal fuel pump or electric
@dosumpthin what size of fuel line did you use to go from the metal fuel line to the carb?
3/8 ths inch
I hate that you called that beauty a rusty old truck, if you take care of it, it'll last forever... nice truck anyway.
I agree. That truck appears to be in great shape in terms of the body.
Great video btw
I knew those were supposed to be closed. Mine are open the little flaps on top.
I need a new carb for my el camino
Thank you.
Perfect video!!!!
Do you need the adapter?
Sure did help, thanks
Thank you really helpful
I replaced my QJ with a edlebrock. No issues , but I do miss the howl of my QJ screaming when wide open. Considering having it rebuilt and putting it back on.
I want to put a edlebrock on my 1983 cutlass. What did you not like about the edlebrock
Mark Melendez tokjuiwiiejfhyhhhu!*v yehhiiagdRyfuuuwhfgog
pushpak jain true, indeed, I see your point. But what about the hahfkensjcif and the hahzuzjdjnrnfgkgiig?
@@spencereades1938 he does make a good point.
@@REAPER3fitty over the last few months, I've really been thinking about pushpak's comment. It's really changed my whole attitude and my outlook on life. I got off the drugs, got back together with my wife and finally accepted my father's apology for never being in my life as a kid. So thanks pushpak...who ever you are
I took off my bracket that goes to the accelerator now I don't have a good pedal
Thanks for the tutorial! where did you wire the 12V for the Choke?
+Rafael MC it should wire to accessories on fuse block
Question, you don't have to install the pcv vacuum line for the distributor?
GreaserCentral PCV doesn't go to the distributor. The vacuum line to the distributor controls vacuum advance.
May wanna adjust them mixture screws
Thank You! I'm doing this to my 1981 TIffin Allegro that has the 454 with the quadrajunk on it. This gives me hope!!!
@jessica cale, learn about quadrajets..they are way better than the edelbrock carbs.you should have a qualified tech rebuild & set up your qjet.plenty of power available & way better fuel economy when you go light on the throttle( small primarys).
@@robinarrington5498 Agreed.
Nice showed me something about my quadrajet… can you show me how your wires are set up want to fix my cable problems
Did you do anything to the metal fuel line after cutting it? Like a flare of some sort? Or just cut it and clamped the rubber line on ? I’m at that step right now with my swap on a 1988 caprice with a gmc 350 sbc
Hose clamps
Where did you hook your 12V electric choke positive to?
Power from the distributor
Thank you 😊
the electric choke ground into the adapter (isnt grounded to block)?
Adapter is mounted to the block so that is considered a block ground
Did the factory throttle bracket work with the edelbrock carb?
Mine wouldn't because it's not wide enough compared to the Edelbrock so I had to cut mine in half then widen it so both bolt holes would line up on the Edelbrock . All I did was cut it in half then bolt both ends on & made sure they were sitting square so the throttle & kick down linkage was lined up then welded a small piece of steel plate to connect both halves . My engine & bracket are from a 78 blazer with a 400 sbc that had a quadrajet on it that the bracket bolts to the back of the carburetor by the rear 2 bolts & not like some later ones where the bracket bolted to the intake manifold bolts . They make a bracket I see on summit racing but it's 50.00 so I said screw that & made my own for cheap & a little time to do it but if I wanted to go back to a quadrajet I would have to find another bracket off of a truck in the bone yard or cut mine in half again then weld back shorter again but I am not going to do that so it will stay this way with the Edelbrock on it being it actually runs better now .
what happened to all the little vaccum lines?
if you don't need them, plug them off or get t's and hook them up if you need them.
its will Help me a Lot !!!! \o/ Thx for share :)
pls answer the question about what happen to the vacoum lines
He hooked all of his vacuum lines up other than the vacuum advance line for distributor advance ! He didn't show hooking up the brake booster but did show the fitting he used for it on the back of the Edelbrock ! I think most of the emissions lines were gone like the vent line from the tank that goes into the charcoal canister then from the large vent tube from the old Quadrajet down onto the charcoal canister that gets filtered and goes back into the gas tank originally but being i see he used a old boat gas tank he has no way of using that stuff ! On most of these old square body trucks that stuff has been deleted by someone at one time because those charcoal canisters would go bad and either plug up or leak fuel and they are kind of hard to find now so most people just delete them although I think LMC truck sells them and all the fuel and vent lines for them ! All you really need is the vacuum line for the brake booster hooked up unless you have hydroboost power assisted brakes that use the power steering pump to run the hydroboost for your brakes and then of course your pcv line to the pcv valve in the valve cover and your advance line coming off of your distributor and it should run just fine if it's in a good state of tune ! Make sure to use the small advance port on the front of the Edelbrock that doesn't have continuous vacuum sucking air as that will cause your advance in the distributor to be at full advance causing it to start hard when hot so use the one side that had no vacuum at idle for your advance ! You can tell which one will have constant vacuum by pulling the plug off of it and can probably hear it sucking air but if you can't hear it put your finger over it to see if it's pulling vacuum or not ! If it had nothing at idle that's the one you want but check it by either using your finger or a vacuum gauge then give it just a little throttle and then it should have some vacuum pulling to operate the vacuum advance like it should ! Just remember if you also have that advance hooked up to full vacuum all the time it will also tear the diaphragm in the vacuum advance and cause the vacuum advance not to work and a slight vacuum leak because they aren't designed to be at full vacuum all the time especially if it's a old distributor that has seen a lot of use which makes the diaphragm weak after years of use being it moves in and out with throttle movement and of course the amount of vacuum the engine is making at different rpm's ! I am doing this same conversion today on my 82 K10 that had a 400 sbc that the Quadrajet has finally gone bad ( leaking throttle plate bushings which cause erratic idle and the welch plugs under the float bowl area the lead plugs have shrunk so once it gets hot from running then shut off they leak fuel into the intake causing it to flood once you go to start it right after so it's time ! I have used these Edelbrock carburetors on quite a few different cars and trucks through the years and they have been pretty good very easy to work on and tune if needed infact I have a 750 cfm on my mild 9:1 build 440 Chrysler with a 509 lift cam headers and a performer RPM intake and it dynoed out at 530 HP with some minor carb jet swaps and timing adjustment done so I am completely happy with them although for all out drag racing or racing in general you would be better off with a Holley double pump or a Barry Grant Demon that's tuned and set up for your engine just for that purpose of racing being double pumps usually don't work very well on the street unless in a manual car or auto with a high flash speed torque converter then properly set up with the right power valves and correct pump shot cams and jetting to get them to work well on a street car the other draw back is fuel mileage will suffer with a double pump as well so on a mild street car vacuum secondary carbs are the way to go if you want to sacrifice some performance and better fuel economy ! Hope this helps lol the only reason I was on hear was to see how he had his throttle linkage hooked up being I couldn't remember if I needed that adapter for the throttle cable to attach which I think I have a extra in my Edelbrock parts stash lol !
Thanks.
very very nice!
Vacuum advance is on the passenger side of carb
Very helpful
It was useful thanks
what carb adapter kit did you use?
Edelbrock 8009 Throttle Cable Adapter and Edelbrock 2696 Four-Hole Square-Bore to Spread-Bore Carburetor Adapter the packages he shows you with the min it are labeled.... but i understand reading is hard.