“Who cares, it’s part throttle”. Words to live by right there.

The most comprehensive, detailed, and informative tuning/dyno presentations ever compiled. Appreciate the continued videos and of course no video is complete without Dewey making a casual or deliberate cameo. Cheers!

Most people call those little screws on the metering block "idle mixture screws". I like the term "idle volume screws" because they control the volume of the emulsified fuel/air mixture from the idle/transition well to the idle port below the throttle blades. So they control the volume of emulsified fuel/air, not fuel, precisely.

Take his advice as gold, and these engines will survive years at this level. I've been following him for decades, and I've built a similar setup to this at my home because of his builds Ive read about as a child. I have a 565 cubic inch big block Chevy with an F-1X Procharger that I street drive with the same 77/58 tooth pulley combo that he tried in this video with my timing locked at 30. I also have a 46 tooth blower pulley if Im able to use more. I haven't pulled my engine in 8 years. I appreciate the lessons he shares with us, and I'm thankful to enjoy the rewards of the knowledge that hes always shared with us for free. Expect brutal power. Good stuff

Thanks again Professor Morris for yet another great lesson 😊 your passion for teaching is Awesome love the longer Video !!! Keep up the Amazing Lessons!!!!

The HP numbers on that engine climb faster than the National Debt Meter.

One of your best videos yet! The information was awesome and very detailed.

Great video Steve,, you helped me on my SBC blow through F-1 deal and these videos are tremendous help! Thank u for what u do!!

Thank you for taking the time to do this. It was very informative and entertaining to see what goes into it. Especially on a blow through setup.

The amount of information, and the things that this will trigger that I had forgotten or things I’ve never know it all, and every other conceivable combination… I am just beyond grateful for the quality and amount of content!!

Steve awesome video as always , i really like those carb tuning tricks for dialing in a performance/ racing carb . Ive got a AED 975cfm Holley that was built by AED for my Shafiroff racing 427sbc

it revs to 5500 and it sounds like its barely trying, yet its putting out 1300hp. Just makes it look so easy to make power. Nice work guys.

Fantastic video. This was really neat seeing how you tune a carb then detune the motor some to make it safe/live.

Awesome dyno session Merry Christmas to and everyone at Steve Morris Engines . God bless .

Great instructoral video for beginners. I've always preferred carburetors. They are smarter than what people give them credit for. If running boost, they act like intercoolers. I'd like the spec's ondy engine tho. Great video as usual.

Steve, thanks for sharing and educating! Great work Sir! Happy holidays to you, Dewey, your family and friends!

Such a good video. Amazed to see a fixed timing amount. I love the learning.

Thanks for the Tuning Tips Steve Morris.

For someone like me, who has yet to do his FIRST BLOW THRU anything.....that is about three semesters of HOW TO MAKE HORSEPOWER, but be happy when you get less! I met Mr. Morris, when I came out to 131 last year to get a look at the wagon. I told him then, and it still stands...."if I ever got in a position to buy some power like this...I know where I am going". I know it's not an LS...and that's the point! I would leave it just where he ended, and in my MONZA'S, or 78 Malibu, or S-10 Blazer, or my 68 Impala, you couldn't cut the smile off my face. Quote: power is easy, making it live is the hard part!

Fun day tuning, the second pulley set, was good, it dropped the mid range torque bump which is good, that area can be the one to hurt bearings, and break other stuff.

Wow great engine. Thanks for all of the details Steve

Stay with the long form vid - always entertaining and informative.

Thanks Steve and Kyle, you guy never cease to amaze me with the amount oh hps you guys get out of these engines , just waiting to see more on your sml blocks 😎👍🏻

I love the carburetor talk.

Great video! Lots of great info on tuning the carb and dialing down a blower motor.

Hey Steve, I’m looking to put a ProCharger on my 565 and this is a lot of great information!! Thank you for your experience and help! I will be giving you guys a call within the next couple of days to figure out the right combination for me!

Awesome video and makes me want one of these Blow Thru Procharged setups even more! As soon as I saw your carb leaking I got flashbacks haha. When I received my carb from them it leaked from every orfice possible. The Needle and seat didn't even have gaskets installed. It made the dyno tech pretty frustrated with me while I tried to fix all of them. Not to mention one of the locating pins for the float bowl on the metering block was completely bent and fell out once the bowls came off as if the pin wasn't seated properly when someone cranked down the float bowl bolts. Contacted Pro systems and all i got was a "Sorry ill let my guys know to be more careful".

Thanks very much for the little things that make the big difference.

Very strong engine awesome video...keep living the dream ✨️ Merry Christmas to you and your family

first engine I turbo'd was a 80 kawasaki kz750 four with the original carbs. I wore the screws out on them by the time I got the jets right! bought special drill bit set, extra jets. even soldering them shut and re drilling

Great carb/boost tuning information and much appreciated. I am in Canada , and for what I do EFI is too expensive here , thus I use carburetors. Many thanks.

Great carb tech, thanks! I mentioned a few months back because nobody really talks about it anymore.

Just want to wish Steve Morris family and crew a Merry Christmas 🎄 I’ve learned a lot watching this channel, Ty

“Who cares, it’s part throttle” finely something I already knew. lol. thank you for all your help

This is some of the best information about carburetors I’ve seen with a ProCharger

Nice refresher course on carb tuning.

Thank you for sharing this knowledge. I always learn here.

I learn something every time I watch his videos. And I thought I knew a good bit about how internal combustion engines worked.

Very cool to see that Steve uses Your Dyno controls and software.

For fun i googled smx engines an found a few people saying its not reliable an is a hit or miss so i had to drop some truth on them lol i told them that steve cares more about his engines in customers car than people know every evnt hes at an hos engines are their i noticed he takes time to check on how they doing or if they need help with a tune they also brought up the viper smx i also brought up tye fact that steve gives a wealth of knowledge an info to anyone i dont have a race car but if i did i would want a Steve Morris engine in caise i know 75% of it was made in house an assembled by hand an care

Thanks Steve loved this one!

Exceptionally informative video, yet again, Steve! Happy Holidays! 👍🏼💯🇬🇺

Added bonus of carburetors. Once you get them setup correctly the plugs look perfectly safe. And once you get to that point you know exactly how you can lean on it bit if you need it. Love your videos, Steve. 👍

It would be great to know the manifold air density with the different pulleys combos, Gale banks has a set up that would be of great help with extra data.

too Funny at 38 Mins this thing is makin Steve Scratch his head on every pull LOL! Men and theyre Machines thanks fer the Smiles and Knowledge on this this Video Mr.Morris

THANKYOU STEVE n SON , you have a fantastic setup there and are great at speaking to us normal people. I'm a basic guy in Oz and I'm learning the finer things to get my next ride running properly, I'm more turbo rather than blower but things might change. Thanks guy's

Idle mixture adds/removes air AND fuel air bleeds are air as you said. I personally change IFR if screws are out too much ie 2.5 x out.

I’m 72 and grew up on carburetors. Once you learn the process, it’s left to the individual circuitry. Holly was my preferred brand.

Perfect video after a long work day!

Thanks Steve, I learned something today

Got a custom built Pro Systems Dominator a couple years ago. Had fuel leak issues and didn’t want to idle. After taking it apart it was nothing like the supplied build sheet said it was supposed to be. It was basically a stock 1050 spec carb. It didn’t perform any better than my home built carb did so I Sold it at a swapmeet. Bought a custom Braswell carb that works well but no better than my old carb built by me outta Holley/QFT parts from yrs ago. Go figure. Guess I’ll put together my own carbs from now on….

Steve flexing his knowledge on this one. quick question, those idle adjustment screws dont back out in the car with solid mounts/poly mounts? thanks for schooling me in carbs today!

I attribute that tip in stumble to the low manifold vacuum caused by a “bigger” cam. I reduce the air bleed a bit more and close the idle screw a bit. Same idle mixture but a richer tip in. If you don’t go too far it will run smooth through tip in and not tank fuel economy.

Back in the day (way back), Gale Banks made 350 SBC dual blow through turbo kits. The fuel pressure was controlled by a special mechanical fuel pump with the control line going to what was the ambient side of the diaphragm. The 850 Holley was modified with throttle shaft seals. Boost was bled off when the throttle closed under boost with a simple valve located in the special air horn. However, these could no way reach the HP/cu. in. this monster has. The highest HP street kit only produced 600 HP from 350 cu. in. (5.7L). The 700 HP version was not recommended for the street. This implies the situation could have benefited from modern turbos and better heads. The max boost was about 7 (if I recall correctly), so that was a major limiting factor, as the kits were designed for a stock block. Also, 7,000+ rpm was not an option.

The other thing with the cards is, watching KZfaq on a television, is usually most tv's don't have an option to "display cards". All mobile phones usually do however. Another banga video. Thanks chaps. 😅

Love the transition at 12:35

Merry Christmas to all at Steve Morris engines

I love it when the parts guy drops a spark plug (still in the box) and hands it to you like there's no way it could be broken. 23:00

I agree. A touch rich on idle is way more responsive. Neutral or a hair lean gives that delayed gag then jumps. Its all within 1 second but that's the difference between competing or going home

25 years ago we were talking bout Blow Thru carbs. Glad they still get their due

Fascinating Steve.. All best xmas new year you and family

I just learned a lot about carburetors that I wish I knew 35 years ago

They are called idle mixture screws. Not idle air screws. They do not change the amount of air in the idle circuit, only fuel coming through the IFR jets. Tip in is controlled by the transfer slot exposure/fuel, and the accel pump cams, and lastly squirter size.

Great video Steve! Merry xmas to you and the crew

Steve Morris, u r sharp. I am learning a lot from u. Thanks for posting.

Steve has forgotten more than I'll ever know about engines. Love watching the videos! ♥️🇺🇲

Idle mixture screws adjust the amount of an aerated mixture of fuel and air in. Idle air bleeds adjust the amount of air going into the mixture. The main fuel jets adjust the amount of fuel going in.

Great Video, learned a lot. Thanks,

Oops! Making too much horsepower! 🤣🤣🤣 Just don't hear that very often

Tanks Professor glad school is back in session...

wow steve keep doing it the way you been doing merry xmas and happy knew year

Spy the AvE sticker! Haha.

My friends dyno , he installed a gas water tank and pumps hot water through engine pre fire up. He says he get work done faster and less cold start fowling and wash down 😊 i helped him plum it . Bunch or ball valves.

Nice result!

Awsome, content love all the differant builds God bless

thats YOURDYNO? Awesome to see that! I use yourdyno for my motorcycle dyno, always wondered if it was just "regular" guys like me that used them, its great to see someone of your caliber using yourdyno!! Thought for sure you would be a dynojet guy..

You just need to buy Kyle a car with a carb and make him drive it to work everyday

Steve Morris is an absolute American treasure this guy is absolutely incredible

Curious what an SMX would make if it was built as a full NA engine big cam,etc

Thank you!

I'm sure I missed it but what cubic inch motor is this and compression just curious as you said your running pump gas. Great video nice to see some expert information on a carburetor from you.

I prefer carb on my vehicles just so much easier and I don’t have to worry about electrical issues

Great video… I am also a die hard blow through carburetor guy. what fuel you are running being non-intercooled on that Dyno session.

Great stuff!

Admire your work . I know you weren't concerned with the oil Pressure as RPM increased , I have had 2 similar experiences with 540 big blocks & it was the Milidon Pick up that caused the issue ? .

Have you tried during a Morse test on your Dyno? I.e. dynoing engine full pull, and then pulling off individual plug leads and retesting to see what power drop per individual cylinder? Stock)ish) smallblocks usually make about 6 - 8 % better power on the middle cylinders, than the end ones - especially the rears I'm sure most know why..

Man this is how I like to start my day💪🏼💪🏼

You don't necessarily have to have gas in the fuel cell for a procharged race engine to make power, but it helps.

Almost 1400hp on pump gas is pretty damned impressive.

Great content thanks for sharing

Great video. Tech was fantastic. Learn something every time you do one of these. Good to know the “old fart smarts” are still around!

Love seeing the blow thru carbs, and the ⚙️ cog belt.. ahh, I’m an old dog… MERRY CHRISTMAS 🎄 TO YOU AND THE FAMILY..😎🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸🇺🇸

I recently found a cracked spark plug insulator on my SBC by opening the hood in low ambient light. Lots of spark leaks around the boot.

Steve sir. Ever wanted to get into a sprint boat? I would love to see you at the races. Webb's slough. Love your work🙏

I really thought i knew everything but that must not be the case. I learned a lot from rhis video.

Not me seeing this title with my 1984 Honda Magna immediately thinking BUT CAN I TURN MY MAGNA INTO A BLOW THROUGH?!?!?

@Steve Morris Engines how about an open house one day in the spring? I am sure there are several Fans that would love to check out and tour the shop.

Idle fuel screw. Back off a half turn makes it richer. Open an idle air screw a half turn, which makes it leaner. You almost had it correct, you correctly called it a fuel screw but started calling it an idle air screw again.

Old man garage had that blow through figured out!

We need a decibel meter in the dyno room!!!