“What Happens When Your Carb Is Too Small ?” Dyno Data shows us

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[@michaelkennedy2528]

He said " It was only making like 750 hp", that must be like having a Briggs & Stratton engine in the shop compared to what is usually in there.

[@AB-80X]

Nah. I think Steve can appreciate a nice N/A mill🙂

[@scrotiemcboogerballs1981]

Lol right

[@WhitegaiaOU812]

🤣

[@GMbusa1]

I would love to have 750hp

[@precisiondiesel225]

Honestly 750hp isn’t all that impressive considering you can buy cars and trucks off the showroom making that kinda power or more. You can take a junkyard LS and a turbo, and make more than 750hp.

[@eriklarson9137]

It's unreal that we can get your level of info for free! I am over 50, and no chance I'll ever need to know anything about building an engine, but I love watching Steve do his thing. It's like following KSR. They are both just simply best in class. :) Thank you Steve!

[@zulumagoo1]

100% in this bracket of life. But i still have an untitled GMC safari van(astro like) i will hopefully one day, find a way to go run a 1/4 mile, somewhere close. Even if i run a 16.99, i will have done an official run at least once, while upon earth. In, an officially untitled racecar. (I promise to at least stick a K&N filter in it and put the sticker on the window, so it looks official. LOL I will sponsor with my logo. (Magnetic signs used regularly as sales tactic while driving.)

[@calboifresh]

yes, but i disagree with ksr comment

[@stevegirard817]

Yup!

[@mikeyoung6351]

@@calboifresh let me guess, Kevin knows nothing, right?

[@justRD1]

Freaking awesome to see you running yourdyno! The DIY world is a great place with some really good people.

[@BigPermGarage]

Being able to see brake output is great. I have my output % beside the pressure reading (hydraulic brake). Great to see YourDyno working well and the user base expanding a lot!

[@vehdynam]

Interesting dyno and engine/ carb information . Many thanks.

[@MrBlackbutang]

We used those valves in commercial marine controls . Great valves for priming big cargo pumps

[@parsonsenergy]

Thank you so much Professor Morris!

[@jonsetzer9556]

Sometimes the intake is too small making the carb go rich too. Shorten runners bigger plenum. Had a N/A small block we had on the dyno tried from a 1150 to a 1650 carb same results going rich cut the manifold apart made the plenum a lot bigger and shortened the runners picked up 35hp with that being the only change.

[@tomhanson4153]

GREAT VIDEO!!!! I learn something every time I watch your videos! THANKS!!!!

[@timothyarnott3584]

Hey Steve, Tim here, just a GREAT vid, just good stuff!!.....i'm an NA guy, and i LOVE the curves you get from this combo........what a brute, if this is goin into an Econrail, bracket type, dude shud be VERY pleased with its performance......nice job sir, LOVED the tech about the Dyno......TY for an enjoyable vid!!!...PEACE to you sir!!

[@einararnemjs3534]

Yourdyno ftw, been running it for some years now. Both rolling road dyno and water brake engine dyno. You wont be dissapointed…

[@jaredfarney675]

The explanation on the Dyno was good. I enjoyed that sweet big block sound!

[@oldblueaccord2629]

Great you got everything updated!

[@491Mystic]

I was just talking to someone about bracket racing last week. Was a interesting topic. Surprised to see a Friday video.

[@planesofpaper]

Great video. Learned heaps.

[@havebenthere]

I've seen those valves with stepper motor in the food industry for years. The new one.

[@Calvin-xp4qp]

Interesting. Always thought smaller carbs just meant less air, less fuel. Didn't think more fuel would be introduced because of demand. Appreciate the explaination!

[@trailerparkcryptoking5213]

Pulls it through the idle circuits....

[@gavinkeller183]

I just noticed your Jakes performance and fabrication sticker on the window. He was a very nice guy and my uncles best friend. They did a lot to his mustang together with pro charger

[@mictozer8350]

thanks for the carb tech

[@bruceplumisto]

Thanks Steve

[@JohnRoberts71]

Great content thanks for sharing

[@MattyEngland]

Yep, they're from Norway. Viking land.

[@MrChevrolet94]

I love you Steve Morris Engines!!!!! Thank you so much for making these beautiful sounding monster V8 engines of freedom and taking a stand against electric vehicle tyranny!!!!

[@tabbott429]

EVs make better commuters by any metric and it actually has nothing to do with tyranny that millions of people are buying Teslas willingly. Theyre simply better cars in almost every way for street/daily use and will smoke 99% of cars on the road while being the safest in a crash.

[@NeverEnoughPyro40]

@@tabbott429 You were out of your goddamn mind, Your statement is solely based on your opinion not facts! Electric vehicles work well under perfect conditions, But add three more people driving at night in traffic in the cold is a whole other story! EV vehicles suck when it comes to towing mileage is horrible and as far as safety goes they are extremely dangerous! But like everything else the companies as well as the media are not showing the public all of that information, Just look how many EV vehicles I have spontaneously burnt to the ground along with everything around them for absolutely no reason! Last year when we had a snowstorm interstate 95 was bumper to bumper traffic during rush hour, Go ask all of those EV owners what they thought of their vehicles! What most people do not know is if a Tesla’s battery goes dead The vehicle Will be stuck in the middle of the road without any way to move it until a tow truck arrives! Also there is no way millions of people or purchasing that garbage! The average cost for that crap is around 60 grand, I have around 30 K invested in my 1993 cobra that also includes the purchase price of the vehicle new! I guarantee you cannot even i’m close to touching my Cobra with a Tesla! Unlike these idiots on KZbin I am an actual gearhead with over 25 years under my belt working as an actual Mechanic! The car is in my garage still fully loaded from leather seats to A/C, I still have the original factory struts shocks springs and sway bars! It has 24,000 original miles, I have driven it from New Jersey to Florida and back for vacation! I have been running near single digit numbers in the 1/4 mile for the past 27 years, Everything is all original on her let’s see how Teslas hold up after 30 years!

[@cameroncashatt692]

after watching your video about mullets engine. i can understand the use of a timing belt with your race engines. since they are built so often and easy to see any damage to the belt. but i just had one snap on me. but it lasted longer than it should've

[@tomhanson4153]

Did the belt breaking damage the engine?

[@mjay6245]

@@tomhanson4153 If it's an interference engine, breaking a timing belt will always damage the engine severely because every valve is getting eaten by the pistons. If it's not interference style, it will be okay if you stop running it.

[@tedgerstenslager2949]

Some tracks are not very clean in the pits and return roads, rocks can and will jump up and get between the belt and pulley and ruin your day. plenty of bent valves and depending on lobe position the piston will come up whack the valve and pull or break a rocker stand. Otherwise it is a good general plan to change the belt in the range of 300 runs or so.

[@montestu5502]

3:32 - it sounds like the supervisor is coming in to check on things.

[@brianb5779]

Love when you do anything carbs..

[@jeffmckc29]

Love that you have my buddy JAKES Sticker on the window

[@brianalbrecht4423]

Hey Steve...enjoy the channel...great video....63yo catb guy....is there a way to test if your carb is 2 small "without" a dyno or make'n a pass @ the track...?...say..if u had a vacume gague piped into the base plate "below" the throttle blades....@ 6 to 8 thousand ...if the carb was to small...would the motor start to build vacume....@ those rpm's if the carb was to small..?....or it wouldent show....I guess an O2 sensor would show the motor getting fat @ the top rpm...?....is that correct...?...there is such a debait on carb size....I've always seen improvments going "up" in carb size....but...have herd others say going the other way netted more power...?....?...anyway....keep up the good work ....good luck with the new trany...& dip'n into the 5's...Brian

[@donwhan2769]

Back again back again for some more Steve Morris engines!

[@13699111]

Thank you always great videos

[@FoolOfATuque]

Until recently every vehicle I have had has been fuel injected, but now we have two Ford F-1s that I take care of for my parents. The '48 has a 460 with a 4 barrel Edelbrock on it and the '49 is an all original Holley single barrel down draft carburetor. I was into the single barrel, because when the truck was restored the person forgot to cap the fuel tank and it got filled with sand blast sand. That's the theory anyways. It is amazingly simple. It has an idle circuit and an accelerator pump. The rod that connects to the accelerator pump has 3 positions. Cold, moderate, and hot. What that means I don't know. What is cold to me is not cold to someone else I am sure. Lol! I wonder if the 460 is over carbed though, because it is a stock 460 from '71 and has a 750 cfm carburetor on it. It is a thirsty beast. I am probably one of the reasons it is thirsty though. I like the sound of the big block a little too much...lol!

[@caldog86]

You should run 2x monitors on it. This allows you to watch the graphs and gauges together as the run is carried out

[@waynep343]

Steve. Do you ever have engines with carbs on the dyno. Do you bring them up to 1700 rpm or so. Before the primary boosters start flowing to see if the IFRs are sized. Holley ships so many with 0.031 IFRs that are sized for a 327. But too lean for a 347, 355. 427s need a 0.035 or 0.036 ifr to not lean out coming off idle.

[@stevegirard817]

Favorite KZbin channel currently!!!

[@bradley3549]

Neat to see the same dyno screen that two stroke stuffing is using on a 50cc engine!

[@Hitman-ds1ei]

I always worked on old holley formula of 1.5 inhg at wot max rpm but curious as to what you look for in determining sizing

[@69orangebug]

Hi Steve, I've heard you say the engine is warmed up before you make a pull. What oil temp do you consider warm enough,and engine oil temperature ever get to be a issue during the drag and drive events

[@SosopChabot]

250hp cam and valve train package, sign me up! Lol

[@whyamihereg]

Nice Dyno update!

[@jameslacey858]

Rule of thumb; max engine rpm X cubic inch ÷ 3456 = approximate cfm needed😎

[@mihailpetrovici5044]

Do carburators do the corrections for iat and ambient pressure by their nature of working?

[@xXxbastek]

To be precise new valve control motor it's not direct drive, there is a planetary reduction gearbox between stepper motor and final output shaft to the valve.

[@benrossbach6501]

How many engine guys can be like hey these 1000hp deals are nice because they are forgiving.

[@jasonspeeds1]

The Your Dyno stuff is pretty good!

[@jacksonbermingham2168]

love carb stuff

[@EricFixalot]

Wow that’s some pretty healthy torque for the cubic inches

[@1bigsyd]

I’m very interested in your dyno,I was wondering for us newbie’s if you could possibly do a full explanation on how your actual dyno works…it would be really helpful and I think very interesting for people like us who obviously know what dynos are used for but no idea how they actually work

[@stevemorrisracing]

How does a Dyno Really Work?? kzbin.info/www/bejne/fmjMkGSojaqSpcU

[@1bigsyd]

@@stevemorrisracing excellent thanks 😊

[@rockingbfarms]

I want plans on how to build one!! 😎

[@stevegirard817]

Just watched dyno video, neat! Always wondered!!!

[@freedomfox8183]

He has lol search it up

[@BassManBobBassCovers]

Pretty sweet curve! 4 digit NA horsepower 😵

[@scrotiemcboogerballs1981]

Awesome thanks for sharing I have problems watching your videos because I get to dreaming about what if I had that lol 😂 what would I be ripping it in 😂

[@timothyphillips7349]

i would like to see the change with the right size carb installed

[@stacy6014]

"Its fun messing with this low HP stuff", just 1000hp. Joe

[@scotthultin7769]

108👍's up Steve Morris thank you for sharing

[@scotthultin7769]

Hello Steve Build a conventional big black cylinder head that have direct injection into the cylinder as the Piston is coming up for compression Will induce more compression ratio by adding the fuel after the valves are closed Think outside the box Sir

[@waynecrumblin4764]

Great video Steve, if your running a 1150 carb & you need more air, is it time to go twin 4’s? Cheers from Aussie

[@bradgriffith4231]

Dynos & real world are different & what works in the dyno room doesn't always translate to the track. Track fuel & timing demands are rarely the same as on the dyno. Pro Systems usually sends customers a smaller carb than they've been running & the car always picks up. My buddy's 86 SC Cutlas picked up .2 second(from 8.16 to 7.97) & 3(165 to 168mph) mph by simply bolting on a PS carb.

[@dantwomey]

You're putting out more videos than Pamela Anderson? ;-)

[@TechnikMeister2]

It not about the maximum power that wins races, it's about the spread of power and torque across the usable rev range or the rev range that the engine will be operating in. So very often a smaller carb with provide better intake velocity and a better air-fuel ratio than a bigger carby. Its the same reason why running over-large diameter headers primaries can rob performance. Bigger is not always better.

[@bradgriffith4231]

Good answer. NASCAR engine builders use the dyno to time the acceleration with the load set for the weight of the car/gear, from low rpm to max for any given track because acceleration is the important factor, not peak HP.

[@drcolster]

Must of had a 250* duration cam in it to make 750 hp with 582 cubans.. Good to see you turned it into a Banger Stavros...Top Job..

[@koop-mi4mc]

Hell yeah Come get some!!

[@bdugle1]

How about an explanation of the dyno and tuning strategy you employ. It looks like you pull against a fixed water brake valve setting, probably to simulate the drag racing load profile better. The Superflow dynos have a programmed rpm increase rate which must use a variable load and feedback to control the rate. I’m not really sure what I’m saying is accurate, so can you explain? Thanks Steve, always interesting info on your channel!

[@stevemorrisracing]

How does a Dyno Really Work?? kzbin.info/www/bejne/fmjMkGSojaqSpcU

[@andrewdwyer6848]

How do I get that camshaft to make over 1000hp at a relatively low rpm. I've got a similar motor

[@DODTruckPulling]

CARBURETOR 🎉🎉🎉🎉

[@peggyparrow2059]

If the vacuum comes back at or near max rpm , that may show it needs more carb, providing there is no other restiction!

[@bcbloc02]

I thought you were feeding water into the center of your Stuska as well? looks like you have it capped now. Was the load in rate too fast with the 4 water feeds?

[@stevemorrisracing]

Still working on it

[@AB-80X]

1002 hp @ 6449. That's pretty healthy. I'm guessing lots of compression and a cam in the 850 lift range🙂

[@stevemorrisracing]

Close

[@bradgriffith4231]

My buddy's 555 made 1050+ at around 6500 with 15:1 comp & .750" lift but cam had 275* duration at .050" lift. His 86 Olds Cutlas went 7.97/168 on gas with a single Pro Systems carb & with 4000ft air density. That's around 7.70/173 at sea level.

[@user-kl8dl7of7x]

Why no afr or egt readings? Just curious, thanks

[@permutatechguy]

If it have to large of a carb does it create a lean condition?

[@Stijnjacobs89]

haha now it look like i'm watching my own dynoscreen

[@stannelson2582]

I think the fans in the Dino room have more power than my 69 318 lol.

[@mikebougher3731]

Probably pretty close.

[@stannelson2582]

@@mikebougher3731 there are two of them. They are ahead. Lol.

[@dannyellis8112]

So when you changed the rods how much weight did you have to add to the crank for balance? What heads and size intake runner were they?

[@stevemorrisracing]

150 grams or so

[@stevemorrisracing]

Head wise I don’t remember off the top of my head

[@colbylux-hale5561]

All that B E A U Tiful Stainless Machined Pipe (with the Stepper Motor deal) transitioning into that PVC pipe... man that kills me and then the transition from PVC to AN 😡, I was kilt. /end

[@bradleybucknall1932]

hey mate - g'day from Australia - love the channel. can you please do a video with Dewey? even tho he wasn't seen in this video - we could hear him 🐾🐾🐾🐾

[@stevemorrisracing]

I will someday

[@bradleybucknall1932]

@@stevemorrisracing thankyou. he is a loveable character & never seems to be far from your side. when you were boxing up the cleetus motor - you should've put a dewey pawprint on the box "shop dog approved" 🐾🐾🐾🐾

[@cboutdoorfun9955]

What size carb is on that thing?

[@allanrickard2117]

You should look at the HUGE market that is out there for Billet K series Heads blocks eccetera if you or (maybe a project for kyle) do 800 to 1200 hp ready to go boozted boys , adam LZ ect will be on your door step i know 16 u tubers who would buy right now use the old machinery that you won't be using (as much)now that you have the new ppl even love them for jet boats and air boats !!!! big market potential

[@stevemorrisracing]

🤔

[@Bigturboguy]

could you use a turbosmart electric straight gate for the valve on the dyno?

[@stevemorrisracing]

Nope

[@stevenconner9984]

Try a twin blade carb. TMC carbs

[@johnnyboyssite]

It looks like there is a gearbox mounted to the output of the stepper motor.

[@michaelmcclure8673]

Seeing that NA engine on the dyno has me thinking, come on boating season. 🚢

[@y2000air]

How much vacuum it pulling at wot?

[@MafiaboysWorld]

Hey Steve. I wanted to ask if you could do a breakdown on carburetor types and the differences between the brands. Perfect example would be Holley vs Weber. Holley you knew what to get thanks to it's CFM number (600, 750, 850), where Webers you wanted were based on size (45mm, 48mm, 55mm, etc.).

[@stevemorrisracing]

I have never e Ben touched a Weber, so I am not the guy for that.

[@MafiaboysWorld]

@@stevemorrisracing Wow! That wasn't an answer I expected. 😂 Thanks anyway Steve, I appreciate the answer. 🙏

[@joebloggs2635]

Main difference is the webers were designed more for inline engines. 4 and 6 cylinders. The best carb for your engine is the one that gives you all the air flow you need and the best consistent AFR across the rev range. The new holley EFI gear is pretty trick. I'd love to see how an EFI setup would perform against a similar sized carb. I believe the 45mm etc reference was designed to make quick reference to porting sizes. Back in the old days, generally speaking, all ports were round. For a 45mm port you'd use a 45mm carb.

[@MafiaboysWorld]

@@joebloggs2635 Hell no they weren't. Lamborghini were famous for using quad Weber's on their V8's like the Urraco and even 6 of them for their V12's like the Miura, Espada and Countach. 👍

[@joebloggs2635]

@@MafiaboysWorld yeah that's why I said generally speaking.... could you imagine tuning a V12 with all those carbs. A jet change would take all day. They probably only went with that option cause they couldn't find a big enough single carb. Perhaps they didn't want to put an American part on an Italian stalion... 🤣

[@woog74]

So basically because it had a smooth rising power curve, that suddenly started to go back down in the high RPMs, this is indicative of a motor that is restricted for air intake?

[@patrickvaugn897]

Very cool

[@ryanveret4088]

Crazy someone let a Methonal 582 leave their shop only making 750.... Pretty sad numbers for that inches and fuel. Great video Steve! 👍

[@robertwetherington3372]

No lie. It must of been mis matched and had a hydraulic flat tappet cam and still shouldve made more than 750

[@donavan2676]

DEPAC is old school Steve, Mine died years ago...

[@HipaParts]

Awesome engine testing system.

[@donaldhalls2189]

What benefits would there be changing to steel from aluminium, wouldn't it increase wait ,thanks again for sharing, all the best to yous and your loved ones

[@stevemorrisracing]

Steel will last longer is all

[@michaelmerrill589]

Ci X RPM ➗️ 3456 = carburetor size at 100% volume efficiency.

[@devinalleman]

Bro, how did a cam swap gain 250hp???? That is what details I wana know!!!! What went into that? Love your cam videos !

[@dirtymuleracing5321]

I’d suggest and engine like this is suppose to make way more power than 750, was obviously wrong somewhere and now corrected by Steve the engine can sing…..

[@michaelgarrow3239]

Had chick complained about the size of my carburetor. I traded for a blower…

[@chrisprattt]

Hey Steve is there a video that shows how a dyno works like what loads the engine down?… Amd in lamens terms lol plus I’m learning with my 6 year old ladybug … she’s acually fascinated😂❤🎉 daddy those engines are the ones in race cars but how do the work not in a car… oh Saturday morning conversations 🙏🙏🙏🙏 idk bug let’s ask! So we are asking you n anyone else that knows as well! Happy Saturday to all

[@stevemorrisracing]

How does a Dyno Really Work?? kzbin.info/www/bejne/fmjMkGSojaqSpcU

[@shawnmiller3563]

Alright Steve!! Where do I get Q16 fuel! I’m not to far from northern shores.

[@ctslandandforestry412]

Would love to get a freshen at Steve’s place

[@aaaaaaaaaaaaaa4151]

Quite a lot of street hot rods are over carb'd,

[@racemax3295]

needs a APD carb on it Steve !!!!!

[@dallaswiens126]

Can you explain what was wrong and what went right to be able to pick up 250 horsepower with a cam change

[@stevemorrisracing]

Inverted profile in the cam shaft. No idea why. Also it kept kicking the rockers off it.

[@MrMotorNerd]

Turbo Barra Steve ? Love from Oz

[@stevemorrisracing]

On process

[@MrMotorNerd]

@@stevemorrisracing Luv ya work Steve , can't wait to see the Geelong designed and built engine hopefully break records . It was Australia's best design . Cheers

[@user-wv1pj6wh4h]

Increase fuel consuption cause carb works on the maximum flow pulling a lot of fuel.

[@danielfmyers]

I like carbs 🍞

[@MrBlackbutang]

Do bleed actually reduce air signals the more they are open? Thanks Steve

[@stevemorrisracing]

Other way around Introduce air signals to the main well

[@MrBlackbutang]

@@stevemorrisracing thank you Sir

[@jamesklink4698]

Nice. #!!! 😊😊😊

[@fredlogan3849]

that is surprising it makes 1003 this is your typical 7.80 bracket engine it should be making 1150 to 1200 HP to be a fast bracket engine then it would be approximately in the 1/8 a 4.50 to 4,60 ET. great power gain but week for the cubes probably in the heads and a couple more in the carburetor. speed cost how much do want to spend? thanks S.M.E

[@bradgriffith4231]

1050hp pushes my buddy's 555ci BBC, 86 Cutlas SC car to 7.97/168 with a 5.07 1/8 mile, on gas with a single Pro Systems carb.

[@brianpaterson8564]

Nice