I have a long write up posted on vintage mustang forum covering when I worked through tuning similar to this. In summary there are 4 different stages to be tuned on Edelbrocks. Idle, Cruise, Acceleration, and Wide-Open-Throttle (WOT). Tune the Idle with a vacuum gauge obtaining highest vacuum at stead ideal RPM by adjusting two front screws. Cruise and Acceleration are controlled by the primary rods and jets and tuned with an AFR gauge. Transition between cruise and acceleration is controlled by the step up springs and accelerator pump. After idle is tuned, next tune the Cruise mode at a steady cruise RPM - moving up(richer) and down (leaner) on the chart to achieve desired - typically AFR 14.7 for gasoline and 14.2 for E10. Then tune Acceleration moving left (leaner) and right (richer) on the chart ~14 AFR. Note here that you will be in acceleration mode when the rod lifts out of the seat overcoming the vacuum (you can actually see this if you slide the cover over a bit). The moment this happens is defined by the color of the spring and you have to know when this is in order to ensure that you are tuning the Acceleration mode. WOT is controlled by the secondary jets and is tuned by changing the timing of when the secondary air valves open by adjusting the spring tension or air valve weight (depending on AFB model) and secondary jets to achieve ~12.5 AFR when stomping on the gas pedal. Usually the secondary air valve weight is actually too LIGHT causing the famous 'Edelbog' when transitioning to WOT.

Achieving Volumetric efficiency. Performance, efficiency and economy. Good tuning Joe. Car sounds good. Thanks for sharing the process. Take care, Ed.

Thanks for posting this. I am getting ready to tune a carb with the AEM AFR guage and this helps me know what to expect.

Thank you Joe for real world test and tune on the road with all the chart and adjustments explaining. Very helpful.

Awesome info. Thanks Joe. When I get my little 340 up n running again I’m definitely gonna try on a tune like this

Great job and video Joe. If you go the next sixe larger in the secondary jets, I'll bet that thing will land right where you want it. You've got the tedious part done! 🏁

That was fun, just finished watching all the videos on this playlist ,its a really nice Coronet. Cheers Sir 😊

Great video Joe. Best decisions are made when well informed. Data is King.

Great video. I am just about to do the same thing with my car. Now I know what to expect. Thanks.

Great video and very informative Joe.

Great vid , Joe ! thank you !

What your showing is very informative, youngsters may learn something about carbs tuning, I dont know if you noticed, but there was a highway patroll lights flashing behind you for a fiew miles ,watching your demonstration on carb tuning also , keep up the teaching people,good job

I've been using an afr for a couple years tuning those Edelbrocks on my trucks. Power and cruise mode is related to vacuum. The rods have the step on them, when the vacuum is high the fat part of the rod is in the jet (cruise mode). When the vacuum is low the small part of the rod is in the jet (power mode). You can change the step-up spring to affect vacuum level when the rod changes position.

Always something new to experience 👍

Perfect for tuning!

that's a sweet gauge pod! lol great video, looking to do the same on my 360 here soon. got the innovate dual lambda single gauge which is nice since it runs a dual sensor in to a single gauge with dual readouts. loved the info regarding the swapping of the holes on the linkage and damn after the changes, you were really able to dial in pretty much on top of that 14.7. Incredible what carburetors are capable of with the proper tune. Looking forward to seeing how you finalize the last little lean issue at WOT awesome work!

Great video!!! I learned a lot. Thank you.

I have one of those same AFR gauges. They sure are a great help for tuning. I've always liked those Edelbrock carbs. Also, if the owner ever wanted to install fuel injection then there is O2 bung already installed. Would be neat to see the fuel mileage. I bet it's pretty good. Great video.

This is an excellent How To Video ! Your style of delivery is great ! You convinced me ! So I decided to buy an AVS2 800 for my Magnum 402 70 Duster. As a suggestion, do yourself a favor and get a hold of a Progression Distributor, and do a tuning video on it. Like the Edelbrock, talk about modern technology ! I've had one for two years now and it is fantastic ! I can't go back ! LOL I have to say, your voice and manners are dead on the fellow's voice that you heard over the speakers at the Indy Nationals, back in the day.

Running good !! I like the black eddy, looks good !

Nice job Joe, this car kind of reminds me a lot of my 64 polara 500 it had a 383 HP.

This brings back memories😎 (Good ones)

i dont know what it is about this old coronet that trips my trigger because i never have been too big on 4 door cars bjut this one is so cool.you have done a good job here joe,good work

That’s a nice looking carburetor. I think eddy’s are great as long as you don’t have to do a lot of tweaking and tuning on a regular basis.

Great video as always!! Generally the people that don't like the Edelbrock (or insert any other brand here) carbs, don't know how to work them.

That’s pretty cool I love the content ❤

Excellent video, I've got to get one of those AFM's.

Awesome video!

Excellent live data tool. We should all run these...

Testing takes time . Good results

Great idea weather plays out a big difference.

Didn't know about those AFR meters. COOL 😎

Perfect instructional video Joe. Doesn’t matter if an Eddie or other manufacturer Could there be some limitations on the fuel pressure with mechanical fuel pump near end with the leaner readings

I have considered getting two afr gauges so I could see each bank Joe - another good video !

Awesome brother

Blipping the throttle and then letting the foot off causes a fuel dump into the manifold followed by the throttle plates cutting off the air supply. Thus, the rich condition. The accelerator pump is typically set just for a quick start condition, where the throttle blades don’t close immediately after the fuel dump. I set it just to where there’s no hesitation.

She runs great Joe love it ! What do you think about using carb spacers to improve performance? I’m putting an edelbrock 750 on top of a vintage edelbrock ch4b dual plane and thought about trying a 1-2” spacer . Putting it on my 440 .

Have the same afr gauge, just haven't used it yet. Been tuning for gas mileage without one and I've gotten good results but it'd be nice to get some numbers faster than waiting till the next fill up to check mpg. No plans to install it permanently on anything.

I have that same AFR gauge but I have yet to try it on anything. Looking g forward to messing with it.

There you go, learning.

I love it. It has to be the best way to tune a carb.

Joe you should try the Gunson Color tune kit like I have for 14mm plugs . even David Vizard approves of the kit . there are youtube videos on how to use the kit especially from Gunson them selves. it's a fuel / air mixture testing kit .Did you also check the vaccum at idle and take that number and divid it by 2 ? after that you get the tuning kit for the carb and match up the colored springs number that matches you final number

Cruising is constant throttle (high vacuum) regardless of rpm. Power is low vacuum heavy on the gas pedal. May need a heavier spring also to increase enrichment earlier when stepping on it. BTW, thanks for posting this, it's very informing.

Good video. Getting it dialed in for sure. Curious to know what kind of gas mileage it ultimately gets when all is said & done. 😎. Tuning is always fun. Something I’ve always enjoyed.

Love an edelbrock great carbs

Nice running motor you hooked him up with JMJ.

It would be interesting to know exactly when the secondaries open.

joe loved the vidio brother, when installing your o2 sensor how far back from your collecter did you go also did u angle it up on the pipe ?

An afr is definitely a great tuning aid.😎

Good job . Quite a bit over my head but interesting and I liked seeing the car run . Did I hear “ not breaking any traffic laws “ ?

4 minutes ago, perfect for me! Good morning JMJ!

Ok Joe, between you and Andy Wood I am going to have to buy a Air/Fuel ratio gauge !

thanks Joe!!! looks like I'll be getting an AFR meter too. big thumbs up and a sub from me mike

Sounds like I heard a bit of detonation happening in the video under WOT. My biggest complaint about the AVS2, the transition circuit is pig rich. So, if dial in idle and cruise at mid to high 13's, leaving my long neighborhood, while barely on the throttle, it runs in the 9-10's afr. As soon as I get out onto the main road, it clears up to mid to high 13's. If I tune out the transition to be at mid to high 13's, then down the road, at light throttle, it's surging at high 17's.

So much easier to dial in a Holley Double Pumper... Good Job, Joe

Probably the best street carb in existence

Smidge lean across the board. Try to hit low 12 to 1s on kickdown and higher 12s for cruise and wide open. Having timing all set up is key

AFR here I come. Gotta learn about you! More stuff I don’t know anything about. Lol. I missed my calling.

I did this to my Chevy 350 with AFR 195 heads and a .500 lift roller cam. I was really surprised at how close my Edelbrock 1406 600 cfm actually is. I could just leave it alone. 🤷‍♂️🕺

Sad to see it leaving! I was getting attached :( I have a pretty different way of setting this up to save yourself a lot of hassle. So you can tell me to go f myself, i wont be upset or anything. This is just a different technique to take advantage of everyone using AFR with carbs. After you get your timing set to its final and the car warm+o2 sensor warmed you start the carb tune just like you always do. Just do it in gear, parking brake isnt enough, gotta have someone holding the brake down for actual operating vacuum circumstances. Set the idle speed next followed with resetting those idle screws and back to the idle speed until you get it where you want in gear until your AFR is set for your desired spot (I prefer 13.7-14.5 so when you hit the squirter it snaps hard from that vacuum reaction). After that process is done like that those mixture charts are really accurate. I mean Bob's your uncle for the rest. My big block has a monster hydraulic cam I use a 670 carb with for max gas mileage and when I keep my foot out of the floor I can hit 22 mpg... yes 22! All from that simple idle circuit set up. The rest of the tune is simple unless you want to keep that number dead on all the time. If so, well, ya gotta look at your primary and secondary transition circuits and air bleed sizing. Yes its a mess for street tuning to get it perfect 100% of the time but way worth it. Im pretty damned meticulous with my carb tuning so Ive pulled out all the press fit crap and tapped my own air bleed set I made from blanks. I even go so far as logging all the stepping with my secondaries locked out. After all that I worked the vacuum secondary circuit just with jet changes. The primary circuit not being absolutely dialed in can totally wreck your tune when the secondary opens up and goes 12-17 depending on load/rpm range that baffles even the most expert seasoned carb guys.

Have you had problems with your wideband reading wrong? My autometer seems to have the o2 sensor going out. I wonder if the AEM is better.

seems like a dumb question but what should i be looking for a lower number or higher when on throttle

Can AFR sensor be used in bolt on collecter . So i don't have to take headers off .

Does the aem allow datalogging? Does it allow other inputs like rpm or tps?

Never thought of switching the rod on the pump.

Great idea and you turn both each time correct?

what was your initial timing, and temp. at idle ?

You were a bit mixed up in your use of the tuning table. Your rod changes were in the lean direction for both cruising and power which is not what the gauge indicated that you needed. You should have leaned your cruise mixture, which you did, but richened power mode by moving to the right on the chart. That's why your last WOT run was way too lean and the engine was detonating. I just went through the exact same tuning process on my 65 GTO with 406 smallblock Chevy using an Autometer AFR gauge. I ended up with I think #21 on the chart, meaning I had to buy another metering rod. I also played with the step up springs which made a big difference in transition.

I forget what motor is that in the car JMJ?

What mpgs did you get

first thing i do to an edelbrock is move the accelerator pump rod to the bottom hole.

I thought I heard spark knock but not sure.

Is that pinging at WOT???? Sure sounded like it.

I've never seen anyone use an afr on a carb. The afr sensors we use for injectors needs to be at an operating temp. They receive duty cycle voltage but you give yours full power I bet they have a resistor to compensate for duty cycle voltage. Car computers are fast. This system is the best I've ever seen for working a carb. It's just a breast in and of itself. Lol

65 is cruising I believe? 🧐

Definitely too lean at wide open, and I thought I heard it pinging also

Not bad

👍🏻💯🇦🇺⛽️

16:00 Your AFR during WOT is way too lean.

Your AEM gauge is way too erratic to make heads or tails out of. I went through three AEM gauges, all of which went dead within five miles, before switch to Autometer which gives a much more stable reading.

23 and 25 are to lean. I can hear ignition pinging! Don‘t destroy your engine.

Lean is mean 😂😂😂

Great video but you’ve got some serious detonation going on 😳

Horn hoop on the steering wheel should be at the bottom . 🤦🏼

Legend has it that 14.7 is the ultimate sweet spot. Am I wrong?

you're turning a 1407 into a 1406

Too lean

Why is your vacuum advance on the center where you would hook to a pcv valve??