Screw Vs Roots!!

[@jacksonwalton7404]

From a thermodynamics standpoint. The screw blower is a true air compressor. The roots blower is an air pump. The isentropic efficiency of the screw blower is about 24% higher. Excellent video we appreciate it.

[@claudehosch4706]

Root makes power much faster: I raced a few screws and drove out of their lives on the hit. They ran higher speed and faster et's, but the damage to 200ft was too much. My 7.60's beat 7.15's and 7.20's.

[@pattys409]

Anybody cool enough and crazy enough to hang with Scotty Cannon is who I'll be rooting for . I'd love to see him back , he is a freakin legend

[@joshuabuxton7502]

Hell yeah, I totally agree

[@michaelbarcus]

Scotty Cannon was the very first funny car guy I ever seen live. Got to stand in the middle of the track at staging when he left the light. It was a feeling I will never forget. And Cannons cool ass glasses he would wear was bad ass. This was in the Late 90's in Huntsville Alabama and I was around 18 or 19.

[@b.bryant]

I seen Scotty Cannon race in Orangeburg South Carolina when I was a kid i was hooked ever since

[@johncontrevo3330]

I am one of those folks who asked the question. I want to thank you for taking the time to make this video. I appreciate it.

[@dougstanley2864]

Love the Detroit Dragstrip shirt. I'm a 65 yr old Detroiter, retired steel mill worker and my older brothers use to race there. I'm a big fan of yours and always Robin for ya. God Speed Sir

[@Taras-Nabad]

I can't tell you how much I enjoyed this video and I will watch it 10x more times. You are a true drag racing engineer. My complements to you and all your teachers throughout the years. Seriously, you really know what you are talking about and you are not afraid to share it.

[@HoweMotorsportsNPK]

Glad you enjoyed it!

[@marklottero5345]

Kudos for sticking with the mechanical injection. You definitely learned from some greats!! Good luck this season

[@RenegadesGarage]

Howe Motorsports.. Awesome explanation of the differences between the screw and roots blowers.. Thanks for sharing it.

[@stevesmithmotorsports]

Love your straightforward explanations on everything! I’m 55 and building my first blown alcohol 69 Camaro. Your a wealth of knowledge thank you for sharing

[@HoweMotorsportsNPK]

You are welcome and thank you for watching!

[@jasongomez2513]

Most people don't tell secrets, but these guy are going to the top this year 🎉🎉

[@IHRacing-yl5jm]

Excellent explanation about the different types of blowers and fuel system delivery!

[@gskjr01]

Very well done Jim, educating fans can only help keep DRAG RACING popular. Thank You!!!

[@harrystevenson7098]

Always a pleasure Jim and the crew about all the great info of how stuff works and how professional you speak off everything that go's on in our future of our NPK season soon starting see ya in Hebron Ohio 1st race

[@HoweMotorsportsNPK]

Thank you . We're trying to get better at it.

[@jbsears8836]

I think that's awesome the way you keep the "old"/ur way of tuning instead of just automatic going to the easiest ways. Also sir if you guys are running like ur car was at the end of last year its gonna be a good year for sure.. I hope you have nothing but success this year brother you deserve it just a really humble great guy! Give um hell big guy!!

[@022367ASM]

Thank you for taking the time to explain in depth of whats going on between different blowers. Very cool!!!

[@nitrofreak67]

Best blower school video I've ever seen. Well done! Ty!

[@TheRoguelement]

Your team is still ass kicking keep up the great work .. Hats off to Howe Racing ...

[@pbajeff3150]

Excellent video Jim. I have been around a lot of the NPK guys the last few years and I appreciate you taking the time to put stuff like this out. You are quickly becoming a fan favorite.

[@joshuaquilliam2887]

Mr. Howe you sir are an excellent teacher. You broke that stuff down clearly, and quickly. Great video and thanks for taking the time to make it. I look forward to seeing more. God bless you and your family!

[@chadriddle3517]

I tell Jim I certainly learned a good bit today ! I know I also appreciate you sharing the knowledge and hopefully this type mentality will help continue to grow this sport! I’m so pumped about npk season 6

[@jameswebb9708]

Hell yeah, Scott cannon was my hero back un the day, loved watching him race.

[@denniskundin5135]

I really enjoyed the video. It was informative from a technical standpoint. No fluff, no BS just data from your experience. Your approach into the youtube arena is exceptional. I would encourage you to keep the technical lessons and information of your program coming. I worked for NASA where I ran the Facilities Operations & Maintenance and programs. I have multiple certifications in many technical fields so I really appreciate your content. Keep it up. Thanks

[@GUMBLLnz]

you can tell how he describes things the knowledge he has. hats off to them.

[@paulcowans6953]

jim im so happy to see you doing well. you actually letting your fans know specifics and being so humble your going to be a fan favorite this year especially in the no prep felon community the buzz around your car and program is unreal. npk is going to have its hands full this season lol

[@joshuabuxton7502]

Damn man you got to learn and actually work alongside some real legends and very very innovative people!! Much respect!! David Moon and Howard Monday!! I remember growing up and watching old classic drag racing videos and some reels with my dad and he always made mention of David Moon and Howard Monday, saying those are guys that he would've love to meet and wished he could've been setup next to in the pits back when he was racing.. Jim that's awesome.. Damn good content by the way.. God bless yall and good luck this season..

[@huck01955]

Thanks for taking the time to make this vide and explain the difference in superchargers

[@40831bmx]

Thank you so much for breaking down the differences between the blowers. Very easy to understand!

[@joebjr8053]

Mr. Howe, been a fan for several years. Great job of explaining these 2 blowers. Unless your an older person and been around drag racing since birth, you would just think " Hey let's buy an LS and slap a turbo on it" not realizing the potential of a force air induction system that's been around 70 yrs or so. Look forward to meeting you and the team in the near future and go kick some azz in NPK!!!

[@theviolator2.030]

Thankyou for the video. Enjoyed watching and it was very humbling to see you thank and acknowledge the people who passed on their skills to you

[@kenbourekas420]

what an honor to have a little bit of knowledge handed out by a truly experienced man the hours upon hours of trial and error the money spent on the thrill of speed just awesome I once had the opportunity to be on pit Lane with team Cruz Pedregon at the spring nationals in Kirkersville Ohio everybody should experience the pure power once in their lifetime it is truly life-changing

[@dbriggs1689]

Super interesting video thanks for taking the time to make it. Looking forward to the next one. Subscribed.

[@HoweMotorsportsNPK]

Thanks for the sub!

[@andyb9767]

After hearing your video really changed the way I perceive you. Good luck this year. And I pray to God nobody gets hurt.

[@stephenalexander2427]

Great video explaining roots vs twin screw and mechanical fuel injection! 💪🏻

[@NoPrepEliteAndDragRacing]

Great video!! I've always been a huge roots and screw blower lover. I thought it was cool that even i could understand what you were explaining. And now I know what all the signals were about..and its going to be cool to see them this year and actually know whats going on! Great program! Huge fan! ❤

[@rogergrandify]

THIS VIDEO IS GREAT THANK YOU AND GOOD LUCK WATCH YOU ALL THE TIME!!! NO SCREAMING NO RIDICULOUS FAST TALKING JUST PLAIN UNDERSTANDABLE.

[@michigangreen1915]

I’ve seen so many videos about Procharger and turbo cars but I’ve never seen anyone from street outlaws talk about the screw blown setup. Looking forward to seeing more from you guys. I also expect to see a lot more screw blowers in NPK this year.

[@georgeweivoda6145]

Terrific piece! Makes me think that your "manual" tuning is more effective than they guys that are using computers to control fuel delivery, since your program seems to be head and shoulders above the other Screw blown guys. Y'all set the bar really high-keep raising it, and I look forward to season 6!

[@keefespencer1173]

I've always heard that you can make more power with mechanical fuel injection over EFI just like you can make more horsepower with a mechanical fuel pump over an electric fuel pump but they do make good brushless electric fuel pumps nowadays that you can make alot of horsepower with like the Aeromotive electric brushless fuel pumps starting with the 5.0gph you can make right at 1000hp with them and get as big as the 20.0gph and I'm sure you can make over 2000hp with it if you have the right injectors and so on

[@NBSV1]

@@keefespencer1173 For a long time mechanical injection was the only way to reliably get enough fuel flow to make as much power as these engines make. Now there’s big enough electronic injectors to make big power without mechanical injection. But, fuel pumps haven’t quite gotten there. Generally you still have to go to a mechanical pump for high power on something like methanol that takes a lot of fuel. The main downside to mechanical injection like this is they don’t work well for driving around. They can be ok for idle, and work great at full throttle. Now a days some people want a 5,000hp drag car that can also drive on the road.

[@Mltemple8333]

Master class on blowers and especially mechanical injection. Thanks!

[@roberthenry831]

I could listen to this all day !...I appreciate the knowledge!

[@rollsroyce123]

You are so cool Jim I love watching you race. I am always rooting for you. I live in Grand Rapids Michigan.

[@perrylankford4269]

I just learned more in 15 minutes than I have in 20 year's.. Thank you.

[@racerd9669]

This has to be the very best explanation of blower engines I have ever seen. You explain all 4 types of blowers in an easy to understand way. 28 Years ago I built a 489 in BBC for a costumer and it had a BDS blower on it. It made 20lbs at 6400 and 1444hp on the engine dyno, with cast iron 502 heads and a small flat tappet camshaft. When BDS sent us the set up we had both top and down nozzles. needles to say we had way to much fuel in the engine and ended up running the top nozzles only. A thought about the fuel pump speed, I just wonder if a guy could not build a miniature CVT style transmission to work with the fuel pump? AWESOME video for sure, Thank you

[@malbrandow7382]

Really enjoyed this episode Jim. All the very best this season!

[@treydavis8534]

Wanted to know this for like a whole year now. Thanks for the video.

[@RaspingPompano2]

Great video. No one ever explains in simple terms what the difference is. And it leaves a lot of people confused.

[@billhamilton5498]

Thanks Jim for the education. Stay safe!

[@denniscox283]

This is an awesome video. I have learned a lot by watching it. I really didn't know the difference between a screw blower and a roots blower. I feel like I understand a little better now. Blowers are just bad ass and they are cool as hell sticking out of the hood of a hot rod.

[@WestMichgolf44]

David Monday does awesome work.

[@mikelam2372]

Loved the transparency on this video Jim. Learned a lot! Looking forward to the 2023 NPK season. I think you will really give Ryan a run for his money this season.

[@gregoryhicks2010]

Excellent video Jim Howe. Good luck on the new season of Street Outlaws. John Odom and you represent Detroit muscle very well.

[@HoweMotorsportsNPK]

Thank you kindly

[@orchidtoyo]

I appreciate the info. Not many people actually go into the fueling of the super chargers. I know I learned something.

[@cromagnon3315]

Very cool video. Explained very well and really interesting. Thanks Jim👍🏾

[@turbotonye-4124]

Omg Jim, absolutely killer video. I know you’re extremely busy but please for the love of god please do more videos like this. My older brother and I ran a Weiand 6-71 on our 67 Camaro for a while until we went to a Reher Morrison BB lol. But I have to say you are a true old school drag racer because tuning that hot rod in this day and age with out computer controlled fuel injection is an absolute art. You my friend are a true artist. I could watch and listen to you all day. Keep up the great work and go show these kids how a real man does it. Damn this was a great video. Thanks again. 🇺🇸💪🏼

[@bobballew6087]

Awesome content and extremely informative and very impressed by your knowledge and willingness to share. Good luck with NPK IN 23. You just made a new fan and I’ll be pulling for you this year and excited for new content. Thank you.

[@willisnettlesjr.9077]

You guys are Awesome!! Love to watch you race.

[@lukeg945]

Great Educational Video explaining the difference!

[@karlharrod7270]

Love the tech talk. You quoted the horsepower that the roots blower consumed at full noise, it would be nice to know how much the other blower designs consume for a given amount of power.

[@lawrencebeeler6273]

You just answered a whole bunch of questions for me sir !! thank you 👍🏻 I really want to learn more about your small tire car 🙏🏼🙏🏼🤠

[@Dfour]

This amount of knowledge made me feel simple. Great video

[@pierrewhite5199]

Amazing pretty interesting... Keep them coming great info

[@HoweMotorsportsNPK]

Thanks, will do!

[@hardmachine]

#1 I learned you seem like a nice guy, #2 awesome information in a short package, thanks man I’m a subscriber

[@billallen4793]

The first time I saw the red Willy's coupe I was a fan of Scotty Cannon, that car just lQQked like it was doing 90mph when it was parked! And he was an honest guy, if you asked him a question he'd give you an answer..lol..from Wyoming USA 🇺🇸 👋🤠

[@bryanluntz1603]

Hey Jim Enjoyed listening in👍

[@vinse001]

I enjoy you and your race program so much more then odem. Awesome videos thanks for explaining how everything works👍👍👍

[@bradygies9994]

Thank you for your time brother, God bless you and yours this Resurrection season.

[@HoweMotorsportsNPK]

Same to you!

[@obaits3225]

That’s for all the info man. Love watching you guys race and the technical aspects of your podcast is awesome. Also from Michigan and love seeing team Detroit content

[@richardpenner4686]

Great info...thanks for sharing

[@sendit2873]

Thanks for the heads up good luck man you deserve to be on top

[@seananon4893]

I absolutely LOVE videos like this. Thank you sir for giving us pleebs a peek at what's going on inside the cars we love so much!

[@sambow4u]

LOL,, WOW ! Voting for ya over and Over on the Captains Poll, And always pulling for ya !

[@BGCoop79]

Cannot wait till Sept/Oct when you guys come back down to Ennis for NPK. Great vid Jim!!

[@SuperSkully]

Loved this!!! Learned a ton and I've been a fan for many years. Best of luck going into this season.

[@ronsolis8182]

Ty, for info. Was clueless before this video👍❤️

[@davidvonanderseck8649]

New subscriber here. I have a street rod 74 Camaro I have been working on for the last year. 468 bbc with a FTec hooker headers and afr heads. A lot more to list but I always love watching what the big guys are doing. Never heard of LDR but can't wait to see some racing. And hear it run. Wow I like to get a small blower for the Camaro to play with. Awsome stuff

[@rpturbo]

Very cool video sir! I've never really gotten into that level of power. I kinda knew some of those basics, but enjoyed learning about the mechanical injection side. Seems so easy to wound a setup with the proper knowledge. I tune EFI, but couldn't imagine trying that.

[@aaronermis4082]

Awesome job explaining the differences. Obviously takes someone with a ton of knowledge to make the manual system work right but once it’s working it’s a thing a beauty. Performance speaks for itself. 👍🏼

[@wayneparsons5224]

Watching you guys come onto the scene is great, keep up the great work, can't wait for NPK6 hope you continue with your success and kick some MAJOR ASS!!! Watching from Canada 🇨🇦

[@wayneikola2650]

Very succinct and easy to understand. Thank you.

[@Red_5_Standing_By]

Thank you for all your explanations! Good luck this year in NPK.

[@wizardshome9686]

Very good and instructional video You say you could do a long version of this - I suggest you do that - your are one of the few that still run mechanical system and like you say it is ancient, designed By Stu Hilborne and Jim Travers in 1948 - these modern systems like you run is do to the forced competition to manage the power output of the engine and also how to manage the fuel, since the pump output is way more than the engine requires. The way I look at the difference between the 3 superchargers that are used in drag racing ; 1) ROOTS Blower generates more heat and requires more power to turn it because the rotors have to touch - and takes between 4 to 800 horsepower to dive it - I think that a 1471 at 15000 RPM will generate 4400 CFM they generate boost by volume rather than compression. 2) The screw runs free has less volume capacity but takes less than half the power to drive it 3) Centrifugal Supercharger, the most efficient but has specific disadvantages - it builds boost to the square of the RPM so there is les boost at idle and low RPM, the advantage is the requirement of power which is less than half of the screw blower and the volume verses boost pressure is a difficult calculation ---

[@136092195]

Yes I did thanks for info and meet Scotty at Darlington I worked there have a great season

[@MiloPerrotti]

I love the tech stuff and explanations.thanks

[@ledbetterjack]

Thanks for this. I've been into cars & drag racing since the middle 60's & never knew how mechanical injection worked or the benefits of screw blowers. When I first got interested in drag racing, Top Fuel wasn't as fast as your rig. Those things are scary fast.

[@hickoryridgehomestead9177]

Love the old mechanical injection. I worked for Dale Riggs years ago . We were running blown alcohol hydro and building customer boats as well. Even got to tune on Eddie Hill’s boat before he moved over to dragsters. Great times .

[@rogermitchell4606]

You are going to be the next NPK champ Jim 🏆 good luck

[@lawracing8242]

Great video! Please make more like this!

[@kenwienken1396]

Good video. I like the technical stuff. Keep it up.

[@robinwendt5527]

Actually I learned a lot...I've seen you struggle with getting the tune for a while when you switched from radial to no prep but once you got the bugs worked out you're a lot of fun to watch and if people pay attention ur a really good guy and help just about anyone out. Can't be mad about that!

[@HoweMotorsportsNPK]

Thank you.

[@michaelstewart3410]

Howe Motorsports, excellent video!

[@paulkennedy8036]

Excellent video!! Explained the difference between screw/roots very well! Crazy every 100’ of air requires a jet change

[@kenstrickland1863]

Thank you very much for the explanation, it was very informative, had no idea of the complexity of the fuel tuning

[@HoweMotorsportsNPK]

You are welcome!

[@Harley.Davidson]

Wow. Very nice. Very informative. Thanks...

[@ThanatoViper]

Great knowledge right there. I like how you showed Ryan's car lol

[@sikinboat]

very impressive sir. Always enjoy your video's good luck this season.

[@Justintimemetal]

Idk that I’ll ever use this information but it’s awesome to have someone break it down on how these cars work. Can’t wait for more videos!

[@DependableAutoTruck]

with every video i gain more and more respect for you. the way you explain what is going on is simply wonderful to a person who knows hardly anything about blowers. i have always known about them but never fully understood how they work now i do. i also am so happy to know that you kinda go old school not relying solely on computers very few real driver mechanics out there. thanks so much for taking the time and effort to explain and the series you are doing to help other people is wonderful as i have told you in the past Ryan has always been my favorite but i can see a big difference in you and him i think i finally kinda know you even though we never met hopefully i get to go to one of the NPK races soon have had lots of health issues that prevented that but hopefully they are behind me now again thanks for taking the time to explain wish others were like you. really hope to see you in the winners circle a lot this coming year

[@HoweMotorsportsNPK]

Thank you. I sure hope you can.

[@jbsears8836]

I also love how humble and real Mr Howe is as well hes definitely grown on me too. Just such a great family man and im like you hes got another fan this year..

[@brentcrawford2637]

Great video Jim, thanks for sharing that.

[@michaelevensen84]

Thanks Jim, awesome video, Wish ya well this year, hope to see ya in the big circle

[@paulcoote3094]

That was an excellent video. I just stumbled across it. Have subscribed from Australia 🇦🇺

[@HoweMotorsportsNPK]

Welcome aboard!

[@br549rdr]

Awsome of you to pay respect to guys that helped you grow😇

[@karlringe9523]

Hi. Thanks. I am self learning about roots charging, etc until I get to the track and learn.of more experienced people. Thanks for the heads up. Karl fro. Australia