By itself, this video is out of context - This video answers all of your lawn mower carb questions: kzfaq.info/get/bejne/ndOAp6aesZOwlKs.htmlsi=ZXmfEXXmKuxU79Lr

The carb cheater ties this all together nicely where the static carb becomes fairly dynamic. Should I do more with it, or is everyone pretty tired of the engineering stuff?

The best thing about owning a car like this is that you can say “oh I just hit a board with a nail in it” with a positive tone in your voice.

This is just the type of work that actually makes KZfaq suck less. Wonderful work and insight into the issue at hand. Your controlled vacuum leak observation is a great fundamental solution to the problem. Is it just as simple as the atomization? It may be.

I rebuilt carburetors for a lot of years. (yeah, I'm olde) I also "RUN TESTED" my carburetors on a test engine. A mostly STOCK GM 5.7L with a performance cam, but GOOD vacuum at idle. I ran a 4 bbl manifold and built flat plate adapters for various carburetors as needed. It became a source of entertainment to run the 350 on a 4 cylinder carburetor. BUT - it DID run. I do miss those days ... We did have FUN with this stuff !

I am a mechanic for over fifty year, mostly Ford, and am very impressed by your results with this 302 lawn mower carb results. Wish you were my close neighbor, love to trade information. You've got it together!

This simply proves the technology for great fuel milage has always been there...no money in it for oil companies/ politicians.

Cool. Brings me back to my 4door 302 Comet. Was "Grandma's Car" and her grandson didn't want a 4 door. What a fun ride for $300. It had 34k on it. My ex took it to college and I never saw it again. At least one of us got a deer that season.😊

Don’t be surprised. Your right about the vaporization of the carburetor but a big difference is the leaner mixture due to your controller. In my twenties I took a Fiero Gt 2.8. bored and stroked to a 3.2 with some performance enhancements and balancing. 30 mpg then added a potentiometer to the O2 sensor to fool the ECM, giving me control to lean the mixture. bumped mileage up to 38 mpg without any precision monitoring system. Didn’t lean up too much because that would burn out the catalytic converter and over heat the engine. So in hindsight I learned from my advanced engineer dad , who created the PCV valve , that Catalytic converters require unburnt full to operate. That means our modern cars with multiple CATs waste fuel so the Cats can absorb non combusted fumes so they too can burn and glow at the right temp for the catalytic process to occur .

I'd love to see a longer test drive with this system, like 200 miles of highway to get a better figure on MPG. This is amazing, keep up the great work!

You’ve created a Hot Rod Power Tour holy grail!!! Just in time too! Those of us getting 9mpg will be thrilled when production starts! Very awesome video series man.

Holy moly 😲 this is incredible! I recently got an 1989 Ford F-150 300 straight 6 and 40 mpg sounds like a dream! I might have to learn some engineering/mechanics... just wow! Awesome stuff.

My first new car was a 1976 Maverick with the 302 and a 3 speed with a floor shiftier. I re-tuned mine, that started with a 2 degree timing increase, I took a bit off the accelerator pump action for a smaller squirt, and I added a vacuum gauge. I swapped the stock rear axle for a rear end from an automatic car to get a lower more fuel friendly highway rpm. When the clutch started to die I swapped in a 4000 lb Zoom clutch kit which quickly broke my clutch adjustment rod. To improve the handling I added big front and rear Addco sway bars, air shocks with individual air lines so the car didn't swap air from shock to shock stabilizing the rear roll, traction bars staggered right for an almost positraction takeoff, 5 spoke mags shod with white letter B F Goodrich 60 series tires, and a free flow turbo muffler dual exhaust. My tweaked Maverick got timed for a 200 pus a few miles run at just over 140 mph average speed. On the other side at a steady cruise watching the vacuum gauge to keep as light a foot on the throttle as was possible my Maverick got 30 mpg even though I drove the 300 mile test in a driving rain running 60 series tires. 30 mpg for a car that can run over 140 mph for over 200 miles is fairly amazing. I have often wondered what would have happened if I had the internet to use for building a water injection system so I could run even more timing advance, plus could I have taken even more action off the accelerator pump action using water injection? What if I had easy access to the modern timing chain components to advance the cam timing as I've read the smog motors often had retarded cam timing to get the emissions required.? What if I cold have swapped in a modern 5 speed? Maybe lowered my Maverick an inch or two for less under car air drag? Maybe a belly pan to cut air drag/resistance under the car? Could I have hit 40 mpg?

This proves the point of the comment I made on the 1st video of this series about people here on Mexico swapping big carbs on their V8's to the smaller ones that came in sedans or light duty vehicles that had the same engine, (or even from 6-cyl engines I might add). As I said in that comment, the smaller carb probably kills a few horses, but they do save up some fuel.

I was an engine machinist/builder for JMS Racing Engines...we were in all the magazines. We built engines for the top Sportsman class at Willow Springs and everyone with our engines finished in the top 5 every race. This class was limited to 350 c.i and a holley 390 cfm 2 barrel. We got over 430hp out of these engines on our dyno. We did cheat a little on the c.i. but the point is that you dont need a big carb to make power.

I love the engine hold down chain for a broken engine mount!

This is one of the most informing, entertaining, and innovative car videos I’ve seen in years!!! You are great on camera, I love your humor, and you are thorough in your explanations! Good to see another Iowa guy pushing the limits and stepping outside of the boundaries! -JR Kingsley IA

This is totally mind boggling man!! Please take this on a 200 to 300 mile trip and report back to us.....PLEASE!! You have definitely hit on something big here!!! Also, would love to see a dyno pull just to see what it's producing.

I love your unpretentious and humble attitude about this experiment. And it's actually a brilliant experiment.

This was the most enlightening and inspirational video ive watched in a long time. Ingenious work. Thank you for publicizing this.

Holy shit batman! My uncle did this back in the early 1960's and got almost 50 mpg on his V8 Chevy Impala. No one believed it. No one cared because fuel prices were so low back then. When he attempted to obtain a patent GM bought him out with a deal that he "could not refuse". He was paid cash and they provided him with a new car every two years for the rest of his life. Just goes to prove that if our government was really serious about saving the planet we would be driving with some of these modifications today.

My 79 year old boss, who I worked for 6 years ago, he told me a story of how the original Ford Falcon had a backfire "screen" on the intake manifold, under the carburetor body, so prevent the engine from backfiring and killing someone. Apparently it was a common thing, when early day mechanics would work on carbureted cars, when they would do a tune-up, they would have the ignition timing off, and the engine would load up, then backfire through the carburetor, blowing a huge fireball into the person's face, and the problem is, the mechanic would "inhale" violently as a scared reaction to the backfire, sucking the fire into their lungs and dying. This problem required a "screen" mesh to be put on the carburetor. My coworker said that the first Falcon's with this "screen" on the intake manifold, made something like 30 mpg, and so Ford immediately removed the screen, and mileage went down by about 50% - back to normal. The screen apparently caused super fine atomization, which made it burn twice as well.

I just have to say, this man is like the Moses of automotive tinkering. Someone on facebook said "You can't" and this man went full rocket science, made it work like a dream, and then pulled out receipts.

Be careful or you'll end up disappearing.

What a great channel. Our best man back in the 70's owned a blue '73 Maverick (aka Blue Devil) with the inline 6. He added headers and high flow exhaust - made that car run like a scalded dog.

Great job!! In the 1980s, before EFI became commonplace… Most major manufacturers had electronic carburetors of some type or another, that used a pulse-width modulated fuel mixture control needle, versus your PWM air bleed concept. This has been fantastic to follow along with!

That torque strap chain brings back fond memories of drag racing when I was in high school in the mid 1970s. It took me several cracked windshields and a couple of transmission cases before I figured out how to control some of the chassis twist.

Reminds me of a Ford Fairmont my dad had years ago with the 2.3 L carbureted four-cylinder with a five speed manual. It also got around 40 miles per gallon. That was all while meeting emissions standards and delivering power that was adequate for the time in a midsize car. Still, a great project with clever use of modern close looped devices. Would be a good project for someone on the flats such as yourself who wants to turn an old piece of American iron into a fuel economy champ

My God. If someone would have told me that having a screwdriver keeping your glovebox closed looks cool I’d think they’re crazy. On this car it just looks part of it! Awesome

I would love to see a long term mpg test. At least 200 miles. Taking it on power tour would be epic. I would love seeing a few more videos on this setup.

Carburetors engines are most efficient at wide open throttle. The economy gain is largely from eliminating intake runner vacuum caused by the throttle butterfly blocking airflow. In small aircraft we often cruise using wide open throttle and control engine rpm with engine load by adjusting the propeller pitch. Selecting a carb that is going to operate at near max throttle during normal operation was one half of the success. The carb cheater is the genius second half of the equation. You will see less gains when you use a carb that isn't so close to max flow during normal use.

The late Bob Lear (of Lear 8-track fame) took a 1971 Chevy Impala 4 door sedan (4316 lbs curb weight),he paid $1400 for, with a 400 CID V-8 "smogger" engine and modified it so four cylinders were actually providing power and the other four were being used as superchargers. He drove it from Californicate to Washington D.C at the height of the "gas crunch" in 1976 at 55 MPH and got 50+ MPG and reported his findings to the Senate Transportation Committee and asked "Why doesn't GM build this?" The lobbyists from GM mumbled around for FOUR and a HALF HOURS without answering. He used four salvaged Mikuni CV motorcycle carbs he paid $110 for (off a KZ-900) instead of the $1152 Rottra-Jet carb standard. WITHOUT a cat-con it passed 2000 proposed EPA emissions standards. Ralph Nader swore under oath it "isn't possible". But the EPA CERTIFIED the results...

What really stands out to me is the chain motor mount assist. Is a marvel of engineering. I totally love it.🤙✌️🖖

I'd love to see how this does on a dyno. Also, try that setup on a 4 banger and see if you can get 50-60 mpg.

When others say add "X" to your engine and get double the mileage you know it's bs. But uncle Luke is a sceptic from the start and took what started as a joke into something practical. And explained the engineering in a way most people can understand, as always. Hats off to you sir! Thank you for the quality content and yes I'd love to see you try the carb cheater with the bigger carb as well. Keep your head on a swivel for the big oil guys though lol.

Excellent project! Very well done. I heard a tale of a ford truck in the early 70's that got around 50 mpg. It got accidentally sold to a guy in GA. They eventually got it back.

I’m very intrigued by the series. I am really looking forward to see what else you come up with! Great content especially for a new subscriber. I’m glad I found your channel.👍😎

This is great! My dad used to fit smaller carbs to bigger engines as well, but he's theory was that it would restrict the fuel supply, I think your theory on atomization is more plausible.

I had a 74 Ford Maverick with a 302 automatic back in the early 80's. Loved that 302. My Dad and I were always working on cars in the yard. This carb trick would've been something I would've tried back then if I thought of it. I enjoyed this series of vids. Thanks!

In the lab we use a calorimeter to measure energy in a burning sample We put a paint or solvent in a pill shell about the size of a Tylenol PM into a cradle Suspended in a solid steel canister and flood the unit with pure oxygen. We trigger an ignition and measure heat gain. It is not uncommon to blow a hole through the very thick steel. If you can find away to add oxygen to your carb without creating a blow torch you could generate. 100 x power Air us only comprised of 16 percent oxygen and the rest inert nitrogen. If you could add an oxygenator you might get 100 - 200 mpg. I like the way you have a grasp on fuel ratio. You can buy an oxygenator for a 100 bucks but if you use a bottle from air gas you might be able to find bracket and components used in nitrous kits Of course this would be a dangerous quest as the power of pure oxygen is incredible But this would be the key to obtaining a ludicrous mileage

I was born in 67. My first car was a two door 72 Maverick. I miss that car more than any other vehicle I have ever owned.

A friend and I did something simular,, we did it with an 88 Ford escort station wagon. The car got 66 mpg. Lawn mower jet and increases fual pressure. It atomizes the spray. Also we preheated the fual at the carb, so the temp change shocked the partials. It's really good to see someone do what we did as every one says it was bs. Thank you.

You need to burn more gas to get an accurate mpg reading. Drive highway until you're less than 1/4 tank and calculate based on the odometer/trip meter and gas to refill. Repeat in city driving conditions (if such a situation even exists in Iowa lol). I would also be interested to see dyno numbers compares to the 4 barrel, just out of curiosity. Great video series, very interesting!

Great job man I thoroughly enjoyed this and who knows about telling people bout it we all know the whole MPG dealio like pretty much a lot of things in this world are not to their full potential and kept there for a reason. We love it here man

I bought a Ford Focus the first model year. One of my learnings from this mistake was that when a small hose at the back of the motor developed a leak fuel economy went from close to 31 to about 49. Acceleration was non-existent. It actually lost power if you stood on the gas. I planned to install a manual valve in this line but after the 5th potentially lethal recall I ditched the lemon instead.

That's amazing! In all honesty I didn't think the gas mileage would be so good I figured MAYBE 25, 30 but definitely not 41mpg congrats, you honestly deserve a the proper recognition for what you have accomplished, my hats off to you!!

When you think about it, it makes perfect sense. Back in the late '40s and early '50s, there were plenty of v8s running around in the high 200 cubic inch range which had one barrel carburetors on them. These engines in big land yacht cars and pickup trucks with no overdrive and low gears where getting 20+MPG or somewhere in that neighborhood, with no dynamic tuning.

I just found your channel in March 2024. The V8 is a good candidate as it has sufficient torque along with the steep 2.79 gears to shuffle the car along with the swirl and vaporization you speculate on. Now, add a second mower carb with a progressive linkage system that won't allow it to open until the first carb is wide open, along with your mixture leaning device adding more air only when needed you may hit the sweet spot of cruising range and the ability to have power for long grades or mountainous driving. Best regards.

You sir are a genius!! And could make millions by selling the public a bolt on kit for their v8s! Keep up the good work

It's stuff like this is why I am a fan of yours, Sir! Had a quirky idea and ran with it... Wow! Look at those results👍

It would be interesting to see how much power the mower carb could put down. If it's anything decent you better watch out. The oil and industry hit men are coming for ya!

Really cool and well analyzed theory and process. Honestly, I think the little carb with the twin air filter intake looks sick under the hood! I love it! Great content. Subbed!!

Great video, I've been a fan of 500 cfm 2 barrels in my pickups on 390 v8s, had a lot of people tell me that was too small...but, I really like the way they perform, been running them for over a decade

I've been a Ford dealer tech for almost 30 years. I've heard stories that a properly set up VV carb is the closest thing to fuel injection, without actually having it. VV carbs are somewhat dynamic in their operation, but work differently from your set up. I also don't think you'd get anywhere near the fuel economy that you're getting. It is impressive.

I love this content. I always thought there wasn't much engineering you could do to improve an old carburated engine but clearly I was wrong. You are awesome!

Back in the 1970's a guy told me him and another guy were told to load up some boxes from engineering into a truck. He worked for Oldsmobile and the engineer got a phone call and had to leave. While he was away they looked into one of the boxes that wasn't taped very well. In the box was a carb and it had a tag that read 1966 Toronado 455ci 66 mpg.

Those string alignments are sometimes far more accurate than the laser alignments from shops. I have had a shop give me my car back with one rear wheel being at +1* Camber and the other at -1.4* lmao. Safe to say I never went back to that shop, and shortly thereafter, they went out of business! You want something done right, sometimes you gotta do it yourself!

Thanks for sharing your creation. Yes, you are correct in your hypothesis why it's getting better mileage. The greater the vacuum, the more the fuel will evaporate or atomize, and the better it will burn, giving the same power with less waste. Well done!

I personally love this sort of content. Keep the engineering stuff up. Making new solutions for old problems is very interesting.

The chain in the engine bay.. Quite remarkable. Love your work mate!

Old motor head here. Just found ur channel...GREAT STUFF!!! Screw the haters. Back when I was building and racing late models I did modes that guys in the pits would whisper "he's a wack-o thinking it'll make a difference." But I only ran motors that came out of the junkyards...small block 4-bolts out of junked pickups. With the tweeks I did, e.g. jetting the carb differently on the left v right because of a slight difference in centrifugal force ( running oval track, as they joke, go fast...turn left ). Haters will hate...it seems to be their call in life: don't ever do anything, just hate on anything that anyone else does. Best to u my friend...I'll be watching.

I think you questioned how this would do with the 390 Carb. That's exactly what I wondered. Seems like you would need to limit the amount of air allowed through the IAC Valve so the secondaries would still work, assuming it's a 4160, or integrate a throttle position sensor. I would imagine you could get some great results while the car is running on the primaries. Creates some interesting problems to solve. You have me very intrigued by this whole experiment. Guess we're getting close to the feedback carburetors of the 80's when taking it to this next step. It's been fun to follow these videos.

I’d love to see this on a slant 6! With gas prices what they are, you should market this!

Very cool my man, neat to see you were so excited you were shaking. That's what the good parts of life are made of right there.

Brings to mind the vehicle that Buckminster Fuller made using a flathead V8 and one single wheel in the rear. It was essentially the shape of a van and carried 11 passengers. It had a top speed of 90 mph and achieved an mpg of 30 mi per gallon. By some "incredible coincidence", the car had a pretty catastrophic accident when it was demonstrated at the world fair.

Fascinating stuff, never thought of doing mixture management with a closed loop air bleed but now that you've done it it seems so obvious.

You may have made history here my friend, massive hats off and props to you on this!! Keep going with this!

So impressive! And it's on a "Maverick"!!! Fitting name for this project 👍👏👏👏👏👏😎 Cheers and beers🍺🍺🍺 to ya from Canada 🇨🇦

Ah man this brings me back! So want that car now. High School could only afford a cheap car of course so you focused all you money on the engine and brakes to make it "reliable". Awesome video!

You don't have to pull off the road to show us under the hood. You seem like a honest guy.

I would definitely like to see a dyno test to see how much power it lost

My daily ride is an old 2007 Toyota Corolla , small 4 cylinders 1.8 liters engine . 4 speed automatic transmission. I can’t get more than 33 miles per gallon in the highway and much much less city only . You’re doing miracles there man, carry on

Definitely a record for a 302. I know from personal experience though we are moving backwards with fuel economy. I recall cars and small trucks getting like 40-70 mpg back in the day. With carbs. But those were 4-cylinder. Needless to say I'm impressed

41 mog while rounding up and spilling out a little bit. Honestly I wouldn't be surprised if you truly got 50+mpg. I would love if you could find some time to have it dyno tested. Also, you should start printing out hundreds if not thousands of those carb adapters. I want one.

Dude, this has been such a cool series! I would almost convert my efi 302 back to carb if you were selling this as a kit. Awesome video.

Sounds fantastic, I just switched to an EV but there's something undeniable about the personality of a throaty V8

Ok this is anecdotal as heck. But I did this to an old Volvo, they are known for running rich and using up all your fuel. I had just adjusted the carb to make it a little leaner (it was too rich), took it for a ride. Similar to yours. 30 miles ish, mixed driving. I filled up before I left to the brim, and I filled up at the end of this trip. Did the math, and got around 60-70mpg in something that commonly uses 20mpg. Dumbfounded by my experience I made sure to fill up before embarking on a longer cross country trip. Drove up and down, in total maybe 5 hours. Filled her back up, did the math and I was back down to 25mpg. I told my father about this and he said "Of course that would happen. You need to drive for a very long time to get your true mpg". I don't know why or how but I think this is partially true in your case as well. If you can go on a longer trip and get the same results I am sold. Until then I won't disagree or agree with what you're saying.

This, this is mind blowing. I'm wondering how well it would do in city driving. Considering how efficiently your setup works I'd think that number would be equally mind blowing. Talk to a patent attorney, today. Seriously. You are in the realm of GDI destroying tech for MPG.

Wow!I believe you're correct about the atomizing of the mix,it surely does more than my expectations, as far as the overall drivability. I've never had the financial ability to do many of my ideas, and I'm glad to see someone with likewise understanding to finally accomplish a very worthwhile endeaver.MY HATS OFF TO YOU BUDDY!

Excellent! Your correct, gas vapor burns not liquid. Even heating the fuel helps but tricky to do safely. Old carbs sprayed droplets into the manifold, modern cars with fuel injection spray a finner mist, thus better milage. It needs to be talent to the next level in production cars.

About a hundred years ago someone made a run at getting extreme mileage out of a production Chev car. Tire presure was set at very levels to reduce rolling resistance. Tranny, and rear end wear drained and #10 motor oil installed. Wheel bearing grease was replaced with # 10 motor oil. And as you did the stock carb was replaced with a small engine carb. Anything that weighed was taken off. The mileage run was on a hard surface track. They would slowly drive up to 100 mph, shut the engine down and coast to a very low speed, restart and slowly increase the land speed back up. Not the kind of highway driveing we could do, but they could honestly say the Chev was able to get 100 miles per gallon.

it would be great to see a comparison video for the max fuel range from 1 tank of gas from completely full to empty between the lawn mower carb and the 390 carb. I've got a dodge 440 engine I would love to try this on hilariously awesome stuff and the numbers blew me away

Back in the late 70's, early 80's, there was the book that's titled something like the "200 MPG" whatever. The concept is except for cold starts, your economy is better just running off vapor rather than liquid. A lot of the designs were just carbs that had the coolant routed through them to create vapor once the engine warmed. Really cool concept.

I have several old European cars and one is a 1972 Citroen SM that l've had since 1983. French cars rust so recently it went through a two year restoration. While the car was apart l wanted a power upgrade. It has a Maserati sourced 3.0 V-6 with three Weber carbs producing 170 hp. That has always seemed to be a ton of carburetor for that size engine. The same engine came in a Maserati Merak putting out 220 hp so l wanted it to at least match that. The guy who rebuilt it is a specialist in vintage ltalian cars particularly Maseratis he's worked on my cars for decades. Even though the Webers have a cool intake noise and look neat he suggested l put the Holly throttle body fuel injection on it. There's even a company that makes a 4v intake. He has vast experience with this so he knew how to set it up program etc. The car now has 260hp at the crank, is way quicker and the highway milage has jumped from 22 to always over 30 even 34 mpg. Why l'm telling you all this is that the intake system is now dumping about a third less gas into the engine. It faster, cleaner and more efficient. When he said it is roughly about 300 cfm l couldn't believe it. Also the Holly system atomizes the fuel much better

Some of my favorite youtube content of all time.

In the seventies, when hitch hiking was a thing I got a ride from someone who told me about a strange looking carb on a sales fleet car he used for a week through the Midwest. He said he filled up twice and when he got back the company took back the car and was told to leave it alone when he mentioned that he was getting hundreds of miles per gallon. He was a bored sales guy on the road so it might have been bullshit but the physics of the device he described seemed pretty solid. It seemed like exhaust heat was being used to heat the liquid fuel before it was atomized. Combining the expansion of heating and expansion of atomization or phase change with compression and ignition optimized for that seems like something that could work.

I once had a 1981 Plymouth Turismo that got about 100 mpg. The guy I bought it from in 1995, told me he "did something" to the engine and I'd love the mpg. He wasn't kidding. That first week, I drove over 400 miles on 4 gallons of gas. I know nothing about engines, but have wondered for 27 years now what he did. This video might have finally answered that question. He was also a lawn mower repairman!

Thats amazing. Ive heard people talk about similar things but never seen it. I think its awesome

You are a bonafide genius. I’m curious to try that same thing. The control box looks great.

Man, watchin this whole thing evolve throughout this series has been pretty kool. I know you said this was intended to be a joke. But it seems to me that there are a ton of practical applications for this tech. and possibly a huge market for it. Great content man.

The auto industry could have made cars to get very high mileage decades ago. Also covered up inventions like fuel made from human waste. The oil Baron's and Auto Baron's scratch each others back to get as deep in our pockets as they can get! We need more young inventors & researchers like this guy. Awesome work and great video! Five thumb's up!!!

That'd be a cool idea for a cruiser. Keep your big pumper carb in the backseat when you wanna blow the tires off, and the lawn mower setup when youre driving around

I once bought a mid 80s Olds diesel wagon for the nice body. It smoked black like a train so I decided to advance the timing and drive it a while. This cleared the smoke and gave it much more power. And it clocked 40 mpg on a trip. It had the overdrive trans. But it blew before too long so I put my 350 gas engine in. It didn't get 40... lol.

More of this please! I’d love making a V8 land yacht from the 70’s/80’s have ridiculous fuel economy like this. Dad was a mechanic, I know very little of that stuff. He drank way too much

Your channel is now one of my top automotive favorites. I enjoyed your methodical and science based approach in this series, very impressive.

This gives me a little hope for the future from the now generation!

Years ago I worked at a garage and the mechanic invented a screen that went between carburetor and it was copper, the gas burned 100 percent. Got great mileage on any vehicle. Now this was back in the 60’s and carburetors were simple then.

This reminds me of my truck, it's a 1981 Chevy K10 stepside. It was my stepfathers truck then he passed and I inherited it. It was the first vehicle that I drove on the day I got my license at 16. It had an inline 6 with an Edelbrock intake, split headers and a 1 barrel carb. I could put $5 in the tank (gas was $.99/gal then) and drive around all day. I never checked the mileage though. Now it has a 350 with a 650 DP on 35's and get's terrible mileage. It runs great though! It does make you wonder with all of the tech on vehicles these days that we're not getting 50+ mpg now. Most, if not all, engines are direct injected with variable intake and exhaust cams as well as computer controlled timing. Most also have variable controlled intake runners. Many vehicles have had this tech for a couple of decades now. Kind of leads one down a conspiracy type of road!

Sounds like you should offer kits for others to try. It would be a fun test for sure.

You made a great video, there has been countless fuel improvement inventions that never reached the market because of Big Oil & Gas. Even if you got less mileage, you still got great mileage. Doesn't matter if people believe you or not, you are saving money, good for you