David Vizard's PowerTec 10 EP 27 Zero loss sound legal muffler systems
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- เผยแพร่เมื่อ 25 ก.ค. 2024
- In this , episode 27, DV shows how to build a zero power loss exhaust system that has street legal sound levels. That is good news in itself but the best news is that the procedure for this muffler system build is not that complicated.
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TO ALL THOSE WHO HAVE MADE COMMENTS. i AM OVERWHELMED BY THE NUMBER AND THA GENERAL THOUFGHTFULLNESS OF THE CONTGENT OF THE COMMENTS IN GENERAL. THERE IS NO WAY I CAN GO THROUGH AND TYPE OUT RESPONSES. BECAUSE OF THAT I PLAN TO DO A SPECIAL VIDEO FOR YOU GUYS WHERE I PICK OUT THE BEST COMMENTS AND REPLY TO THEM. WILL LET YOPU GUYS KNOW WHEN I BGET TO THAT!!!!
THANKS ALL!
DV
FOLKS SCUSE MY SPELLING ERRORS BUT I AM DEAD BEAT HERE\!
Thank you!
I remember the sonic turbo muffler
In that article they did beat all the others
As usual not surprised that David had
A hand in it.
yeah and the walker version built they way he wanted initially but couldn't do to size constraint, the walker super turbo the bought out version that improved due to larger size on the original 'sonic turbo' muffler. changed the term 'turbo muffler' forever. However ,they are not the same.
ALWAYS a good listen for anyone who wants to learn. David is one of the world's best teachers, easily! Thanks, David, and please keep up the great work!
Only comments I have are, "Thank you" - "Please, don't let reading comments get in the way of making really great, informational content" - I am sorry to hear of the recent loss of someone else who has journeyed many a year and many a mile by your side. Grief is not something we endure alone, however, because every one of us knows the feelings that surround it themselves, too.
You do your family AND your closest friends proud here, sir. What a journey you share with us! Tha k you for bringing us, "the pubilc at large," into your life.
Dale here. I am glad that you have mentioned that the engine does not need back pressure. I have talked with many people about this, and they always say that there needs to be some type of back pressure. As I mentioned in another video that you did "Grumpy Jenkins" once made a comment about using slightly larger exhaust manifolds (in this case headers) so he could block backpressure and therefore gain a few more horsepower and a slightly quicker time on the track.
With what you are talking about here validates his comments and makes me want to agree with you about the person who demands that the engine needs that backpressure is either ignorant or parroting words that someone told them were gospel. Thank you for the information that shows the fallacy of that view.
Thanks David. More good stuff. I have read some of this in your books but having you explain it makes it much more clear. I appreciate the time it takes to do these videos, and enjoy the storytelling that goes along with the technical stuff.
It's true, the side stories are a fun excursion!
I still have a set of 2.5” Sonic Turbo mufflers on my 57 Chevy 150 series 2 door post. I have had them since 1986! I added a balance pipe to make them even quieter. These have always been outstanding mufflers, great performance and sound without all the unnecessary decibels. So glad I finally got the chance to say:” Thank you David, for designing such an excellent muffler!”
My dearest and deepest condolences go out to you and all the family.
Best muffler explanation I have ever heard. I have suspected that this design of open chamber at the end of the collector would work and built a system using a large bore Magniflow at the end of the collector with a tapered outlet. Did not realize the need to have an eight to one ratio. Thank you. Also the 2.3 cfm per hp is extremely helpful. Back to the welding bench.
8 times the size of one cylinder termination box? Is that ratio specific to a V8 motor?
Sonic Turbo mufflers, boy, that brings on some nostalgia. They were all the rage back when i was messing with A series engines! REALLY interesting about SuperTrapps. I nearly bought one of those things. Flowmaster? WOW indeed! Everyone raves about the laminar flow theory. I trust the Vizard oracle, however.
Exhaust pipe thickness is worth mentioning. Quality thick exhaust pipe makes a very big difference in noise level
and pich as i love 440BBM R/T oe exhaust system on cold idling its got a nice after gong/tink to it ( aluminiumnised thin wall steel piping )( love the sounds but sometimes i wish i could turn it down a little but keep the vibe going ) and adds to the general charisma of pre-1972 mopars. but yes i can be a little louder on the freeways/town aka sometimes it's to much noise for me or trying to listen 👂to others/music 🎶radio 📻
I've always had a very high appreciation for fast things on wheels with low noise output. When the sound is so that you KNOW there is power but it's still a "stealthy" vehicle. Once in a drag race there was this beautiful black VW bug with really nice looks. Chrome trims, even original blinkers etc. But at closer inspection it was a tube chassis thing with probably a Porsche engine. That thing went crazy fast and the sound was like nothing compared to some way slower V8's and other obnoxiously loud cars there. It really left a mark.
Back when I had a 2 stroke 50cc scooter (Gilera), I put an aftermarket exhaust on it (LeoVince S) and it was way more silent than the original fat steel system with a catalytic converter (which probably was the culprit of the loudness, as I think it started to brake down inside the chamber, making a ruckus). The LeoVince had a really pleasant sound compared to most tuned mopeds and scooters at that time.
Mr. Vizard, it is a pleasure to watch you not only convey your vast knowledge but to do it in a way that all can understand. Thank you. Terry.
David: first of all, I would like to send my condolences for your loss with a family member. Second, thanks for your presentation on sound and performance using mufflers. I have been dabbling in sound quality and horsepower gains myself on a very "backyard mechanic level" to discover some of the same flow bench testing you have presented. Motorcycle two stroke engines have the same design characteristics by using an expansion chamber before the resonator/baffle section on the system. Cud-dos to you for explaining this insightful information to your viewers. Furthermore, I will get busy with my own build, and try to report my experience in timely manor with track times as a guide....see ya later, and thank you!
I've been quoting your articles on exhaust flow for years. You're brilliant.
I’ve been an exhaust system geek for over 30 years and the high science behind this vid is much appreciated. I watched it twice😂
David, I have had many a discussion with people who assert that an exhaust system "must have back pressure" In future I will refer these people to your video. Thank you
I am not a V8 guy, I love this type of universally beneficial information.
I truly appreciate the time, effort and knowledge that David Vizard and his staff have given us with this series.
Keep the excellent videos coming and I will watch & like them (I'm already subscribed)
Yep all engine's basically work the same lots to learn from v8 guy's inline 4 guys etc
The supertrapp guy at PRI reminds me of when somebody tried to tell Smokey Yunick about engines and racing .... his response was " Its not often I get to hear a genius talk.....". Very humbling knowing how many patents and advancements in engine technology that he had his expertise in. You Mr Vizard are as much a genius as Smokey was. The only way to learn things is testing on the dyno and flow benches to know for sure.
Wow, I remember reading Mr. Vizard's work many decades ago, including the original piece on zero loss muffling. Great to see him still putting out content. Way back when I couldn't figure out how to effectively put a termination box on my 4 cyl race car with my limited fabrication skills, but we found that using a factory catalytic converter body (with the catalyst block removed) as a poor man's attempt at a termination worked pretty well. It was about twice the diameter of the header collector, smooth inlet and outlet, but only 4-5x the volume of one cylinder. Along with a large Dynomax Super Turbo suitcase silencer at the back, it made the sound levels quite tolerable and we never had an issue with getting flagged for noise - from the exhaust at least. Now that open element intake was a different story - had to build a box for that too.....
The Sound is what some owners want like everyone
has an opinion which is what makes this country so great!
Great content . Thank You 🇺🇲🇵🇷👍
Your generosity in sharing your knowledge is priceless. I, and I am positive many many more, am very grateful for this. No one that I am aware of is doing or has done what you are doing for the performance enthusiast. I am building a 355 Chevy and as it turns out I have done many things that you teach.. but not everything I’m sure. It has taken longer than normal to bring this build to a finished product due to me looking for every good deal I can find. However, I will have a very high quality engine at a fraction of the price of buying at retail.
Keep on keeping on dear Sir. I love what you do. Thank you!
Man, I Loved the Sonic Turbo mufflers!
As a Grown (but young) man, I kept telling my girlfriend that I didn't need anything for Christmas. She kept threatening me that if I didn't tell her something that I wanted, she was going to but me one of those stupid cordless screwdrivers! I wouldn't let her waste her money on that ridiculous novelty, so I told her that I wanted a pair of Sonic Turbos for my Firebird. Christmas of 1987 was my first set of Your mufflers, And they were Great!
Thanks and I Loved learning about them!
A well designed X pipe system seems to help a lot. I think David’s termination box is a great idea. It reminds me of trying different sized expansion chambers on a 2 stroke motor cycle engine.
I keep backtracking through David's videos and it has been an enlightening journey. No BS, just good sound engineering. Thanks!👍
I learn something every time I listen to your vast knowledge . Thank you , God bless
It’s great to get your words on these subjects. There’s a lot in your books and your explanations really help them make even more sense. I have several of your books including the book on exhaust systems and this helps a lot. I also really enjoy the backstories on how things came to be.
Thank you for doing this on TH-cam and sharing what you know.
Thanks David. I have to build a new silencer for our Biland kart engine. My original worked well but you just upgraded my design again😊
Many Thanks from the Uk.
That is the best video I've watched in a long time! It makes me want to cut my flowmasters off amd start bending some pipes. Thanks for the knowledge!!!
Cut them off. Flowmasters are terrible. Magnaflow is a much better design and value. Borla mufflers are nice but do cost significantly more than Magnaflow units.
Yes but the 40 series sounds great , whats a few hp when you have lots these days.
Frozen Stang I agree, trying to engineer a complete exhaust system would make me exhausted!
@@davidparker9676 I am running a set is magnaflow. On my classic FastBack Stang. They sounds amazing. I thought flow masters were over kill
@@frozenstang3868 Exactly!
Thanks for all of your videos.
Thank you David! Love the content!
I am learning so much from David! Starting to put what I've learned into practice with all positive results.
David thank you for this cutting edge muffler tech.. I can't wait to start building my system
Great information David, I need to start redesigning many thanks.
David a lifetime of research, insight and hard work you are giving to us. You are an amazing man! You deserve more followers and likes!
Love the info and stories to go with it
Thank you for sharing your knowledge, I haven't seen anything like this anywhere else in my life. I appreciate all your content.
You are a aptsolute genius. Love your videos!
Thanks David for sharing your many years of expert engine building knowledge. You are nothing short of brilliant.
Another great video David thanks again great info and love the story behind it makes sence all the way around
Very good info here with uears of education and experience to back it up. Thanks for sharing and I'll share this with my folks as well. Thanks again!!
have most of your books and learned so much, so glad you have this channel
Your the very best as always thanks again DAVID
Very nice Sir! You have my absolute respect.
Good stuff. Makes your book make more since. Thank you
Thanks for the support that I can build an exhaust system that is quiet and flows!
Mr Vizard, your timing is perfect! I'm building an exhaust for my street / strip car, and this information will help a lot! Thanks. 👍
Thanks for the hard won info.
You resolved some great considerations on exhaust systems.
David, thanks for another great tutorial. You went through this in great detail in your book, but it's great to see it explained again live. I've been using these mufflers for years thanks to your instruction. I'm sure this video will be an eye opener for others who may not be familiar with your written work. Thanks again for the excellent information!
Thank you for sharing your knowledge and experiences David, really good info here that is unique to this channel and this channel only. Much appreciated.
-Joseph
I learn something with every episode.....just amazing.....
Hands down best info covering a subject mostly ignored thank you for sharing your genius
great vid! the story portion really drew me in
I love these shows wish i was smarter thank you for making me better
great video, i stumbled on to various independent research from various sources supporting this information a few years ago but what i pieced together was incomplete. your video definitively fills in the gaps lol. awesome content
Great video and well explained details .. Thanks for your knowledge sir ..
Thank you for excellence in auto mechanics. Really enjoy your informative videos
My first engine building book I read was your Rover V8. Sparked my interest, so glad I happened on your channel. Thanks for expanding our knowledge and sharing with any that will listen. Cheers.
Great Info! Thanks David.
Glad to see your channel growing ! Stay with it you'll have 100k before you know it 👍
Just about 20 years ago, after reading David's exhaust tuning book, I designed a custom exhaust for a 1979 truck I had. My best friend at the time couldn't believe how well that truck ran and it had a stock 350 with just a Edlebrock Performer RPM intake and a 550 cfm Edlebrock performer carb. No, the truck wasn't truly fast but it did surprise a great many people. The absolute best part...All the "Noise" the truck made was induction growl. Many folks just couldn't figure out how that truck made "That Sound" when "getting on it" and have no noise otherwise.
I'm working on a 302 based '67 Merc. Cougar now, can't wait to apply the same principals.
Thanks David!!!
P.S. Yes, I've read your cylinder head porting book. I already have a set for the 302, just have to get the car safe and legal to drive.
I will revisit this video several times while building my small block Ford project
Thank you so much! Fantastic info; grateful to have it!
YOUR THE MAN ALWAYS SHARING, AND STILL HUMBLE ENEOGH TO KEEP LEARNING.
Great stuff love your videos i learn so much
Another amazing video just like every single one you've made. The knowledge you give us to me and makes me feel like a spoiled rotten brat. I just got out of back surgery was trying to go to your two week course before covid hit us so it'll still be a couple more months for me. Would love to know when you're next big porting seminar is I'm still a couple months out
I'm 75 and have learned sooo much in the short time I've been listening to your channel. UTG directed me to your site after I contacted him. Reminds me of my high school shop teacher or my grandfather. Don't believe anything your told until you verify.
As usual, Great Job here Dabid. Thanks agsin.
I just thank you for every video that you do. With so many know it all people posting videos about their opinions, it's very welcomed to see someone who has data to back up their claims. I read your original How to Build Horsepower book when I was in the 11th grade. It was the first book I'd read since I was in the sixth grade. It opened my eyes to the vast amount of knowledge that could be had from such writings. I can't thank you enough for sharing your experience in the way that you do.
Thank you Mr. Vizard. I found your video fascinating.
YOU SIR ARE A GRAND MASTER, NEVER HEARD SUCH STRAIGHT HONEST...
GENIUS WOW WOW WOW I SALUTE YOU!!!
Thanks Dave, great tech.
Learning things on every episode!
Truly, one of the masters of horsepower.
I used your ideas about this and it worked great. I used two old R134a refrigerant container to build the system. I still have it and every once in a while I use them when I run an engine with 3 1/2 inch headers on the dyno.
Great segment David. I also read that section in your "how to build hp" book, which I understand Jacqui had some input.
Great vid....I used walker mufflers in the 80's from the Cambridge,Ontario plant, very cool story.
Very interesting info. Thanks David.
How have you never popped up on my feeds before? A legend of the A series Mini days. I have several of the Vizard A series books. Taught me a lot.
Amazing Thanks David!
Appreciate it
Very informative. Thank you for the effort.
I think I remember reading 30 pages of this exhaust knowledge that you wrote. I kept the magazine for years. I’ve been trying to find it. It’s cool to see someone I’ve only read about. I remember this! Those numbers, and the ‘secret’ to the pressure waves stuck with me from reading this back then. At that time I was in college for an AA in Automotive Technology. I still do this for a living and a weekend hobby. Thank you!
Always good information from your videos. The very first technical book that I purchased about 30 years ago was your book on the mini A Series motor. It has information that I use for other motors as well & I always purchase your books even if I don’t have the motor that the book is written for because there is always good information in them. I will even purchase a magazine just so I can read an article that you have in it. Please keep the videos coming.
Thanks David I'm glad I watched! Just picked up a set of dyno max super-turbos (Vizard's sonic-turbo design) to install in place of chambered mufflers that are a bit too loud with my Isky 288 mega cam. very excited to see the result
I had the pleasure of working for Bill Hill at Tenneco, who I believe was the inventor of the "bicycle fender" flow directors in the ends of the triflow mufflers.
Thank you for spending the valuable time making the videos for us. I remember the magazine test. That's why I used sonic turbos on my 69 Camaro. I put some on my 94 Cadillac STS and made a difference. It would spin the tires when it shifted into 2nd. I would like to experiment building an adjustable muffler with a butterfly in it . And do some flow testing on my floating pressure bench I have 4 approximately 97 cfm motors and also have a Hegelson calibration plate. I need to know how to properly mount it to the flow bench and what bore size to use. Thanks for all you do.
Definitely going to try this on my 71 Chevelle.
thanx david ive been waiting for this exhaust video since your live presentation asked if we would like it. i really appreciate your dedication to the auto world and your videos. your the man man. how do we determine tuned length and where to find termination boxes ???
This was a great video to debunk the myth of back pressure. The Dyno and graphs prove it.
David is the man!
Hi David, thank you so much for sharing and so impressed with all your technologies which I have embraced on my Triumph Bonneville 2011 in which I followed your information and undertook you David Vizard Polyquad head porting design with many other performance modifications and ohhhhhh so so impressed with its performance ………..
In regards to your exhaust design I am now very interested in looking into undertaking your advice and implementing a under engine behind frame open muffler design before the reverse cone muffler to reduce the sound while still allowing a free flow exhaust.
Thank you again so much your sharing all your performance experience ! Regards Greg
Thank you very much Mr. Vizard .I used your system on my 110 cu. in. Harley V Twin and was pleasantly surprised at how much more power it made at all RPM`s (from 1800~6000 ) Than a copy of a noisemaker Thunder Header.. Mountains of Torque!!! We will be using this type of system on our B gas Lakester at Bonneville
WOW. WHAT A WEALTH OF KNOWLEDGE !!!!!!!!!!!!!
Fantastic information.
I remember hearing this stuff about back pressure and I ran a 454 without exhaust and I just could not understand how that mattered after hearing that engine sing. Thank you for explaining everything it expands my understanding a lot
Thank you for sharing your knowledge! I was thinking about installing a "performance muffler" on my truck to reduce exhaust flow restriction. I thought an exhaust as silent as the installed one has to be very restrictive. Guess I was wrong. Seems the silent Walker muffler is doing quite a good job without creating too much back pressure.
Lots to think about here. I've watched this a couple times and now I'm trying to figure out how to fab something like this for my junk
Superb content as always. There are a great many people who think that engines need back pressure to function correctly and they have no idea how stupid that actually sounds coming from the same person who runs ported heads and a larger camshaft etc to obtain better flow thru the engine. Your work also proves that a person doesn't have to settle for a restrictive exhaust system just to obtain streetable sound levels.
Thank you for the awesome content...
Simply amazing
Your right david i used these mufflers and to this day in my opinion they are the best mufflers