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David Visard on exhaust and mufflers #2951956 08/09/21 07:26 AM 08/09/21 07:26 AM
Joined: May 2011 Posts: 4,492 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,492 northern,Ohio,USA	I watched this and it gives some guidance to flow so you don't lose hp. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: David Visard on exhaust and mufflers [Re: Clanton] #2952022 08/09/21 10:58 AM 08/09/21 10:58 AM
Joined: Jan 2003 Posts: 4,834 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,834 Moved to N.E. Tennessee	Same exact info as he covered in this book 11 years ago. Even the pics and graphs are the same. In theory, there is no difference between theory and practice. In practice, there is.

Re: David Visard on exhaust and mufflers [Re: GomangoCuda] #2952046 08/09/21 12:37 PM 08/09/21 12:37 PM
Joined: May 2011 Posts: 4,492 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,492 northern,Ohio,USA	We all need a reminder after some time about info we have read he just dragged it out too long in the video to get to the point. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: David Visard on exhaust and mufflers [Re: Clanton] #2952067 08/09/21 01:53 PM 08/09/21 01:53 PM
Joined: Jan 2003 Posts: 4,834 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,834 Moved to N.E. Tennessee	Originally Posted by Clanton We all need a reminder after some time about info we have read he just dragged it out too long in the video to get to the point. He really needs to have a script to keep him on track instead of just winging it. Nobody sells that expansion box. I bet he has an ironclad patent on that after Walker got him on the Super Turbo muffler. In theory, there is no difference between theory and practice. In practice, there is.

Re: David Visard on exhaust and mufflers [Re: GomangoCuda] #2952126 08/09/21 04:45 PM 08/09/21 04:45 PM
Joined: Oct 2005 Posts: 9,193 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 9,193 Ontario, Canada	The expansion box or boxes is the least of the problem.

Re: David Visard on exhaust and mufflers [Re: GomangoCuda] #2952322 08/10/21 06:46 AM 08/10/21 06:46 AM
Joined: Jul 2005 Posts: 649 Graz, Austria DGS mopar
DGS mopar Joined: Jul 2005 Posts: 649 Graz, Austria	Originally Posted by GomangoCuda Nobody sells that expansion box. I bet he has an ironclad patent on that after Walker got him on the Super Turbo muffler. Would a Hooker Aerochamber muffler work (the center inlet, center outlet version)? Last edited by DGS; 08/10/21 06:57 AM.

Re: David Visard on exhaust and mufflers [Re: DGS] #2952325 08/10/21 07:09 AM 08/10/21 07:09 AM
Joined: Jan 2007 Posts: 685 pennsylvania poboyengineering mopar
poboyengineering mopar Joined: Jan 2007 Posts: 685 pennsylvania	The design looks good, but does it have enough volume? And does the perforated opening affect the "open air" signal that the chamber mimics? Me thinks not. The drawing looks pretty simple, a little math to figure the dimensions and an afternoon with a welder and Bob's your uncle. It may be ugly, but it sure is slow. Girls comb their hair in rear view mirrors and the boys try to look so hard....

Re: David Visard on exhaust and mufflers [Re: DGS] #2952326 08/10/21 07:10 AM 08/10/21 07:10 AM
Joined: Jan 2003 Posts: 13,611 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,611 Marion, South Carolina [><]	Originally Posted by DGS Originally Posted by GomangoCuda Nobody sells that expansion box. I bet he has an ironclad patent on that after Walker got him on the Super Turbo muffler. Would a Hooker Aerochamber muffler work (the center inlet, center outlet version)? All I can tell you is those Aerochamber mufflers are nice! They sound good and make good power. Right in the ballpark of a straight through Dynomax Ultraflow and WAYYYY better than the super restrictive Dynomax Super Turbo. CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

Re: David Visard on exhaust and mufflers [Re: an8sec70cuda] #2952339 08/10/21 08:17 AM 08/10/21 08:17 AM
Joined: Oct 2005 Posts: 9,193 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 9,193 Ontario, Canada	The expansion box is a piece of cake. For a 526 c.i. stroker I calculated a box 4" high x 10" wide by 14" long per side. Then into the muffler. Trouble is the expansion box eats up all the stock muffler location.

Re: David Visard on exhaust and mufflers [Re: an8sec70cuda] #2952357 08/10/21 08:56 AM 08/10/21 08:56 AM
Joined: Jan 2007 Posts: 8,182 Mt Morris Michigan mopar dave master
mopar dave master Joined: Jan 2007 Posts: 8,182 Mt Morris Michigan	I had those on my dad's chevelle. Very nice low mellow tone. I use Hooker Max flow's on my Barracuda. No real testing, but they are quit til ya hammer on it, then just the sound of badass muscle. http://www.youtube.com/watch?v=aIxaesJ190U http://youtu.be/lCZAaN7fFLg

Re: David Visard on exhaust and mufflers [Re: Clanton] #2952358 08/10/21 08:59 AM 08/10/21 08:59 AM
Joined: May 2011 Posts: 4,492 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,492 northern,Ohio,USA	Just some pics from the video to help. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: David Visard on exhaust and mufflers [Re: Clanton] #2952359 08/10/21 09:01 AM 08/10/21 09:01 AM
Joined: May 2011 Posts: 4,492 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,492 northern,Ohio,USA	2 GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: David Visard on exhaust and mufflers [Re: Clanton] #2952372 08/10/21 09:26 AM 08/10/21 09:26 AM
Joined: Jan 2003 Posts: 21,678 Eagle, Idaho Neil The Doctor is in.
Neil The Doctor is in. Joined: Jan 2003 Posts: 21,678 Eagle, Idaho	My brother has aero chambers on his car, and it runs very close to the same times so he just leaves them on when he races. Not worth the effort to remove them after driving the car to the track.

Re: David Visard on exhaust and mufflers [Re: Neil] #2952457 08/10/21 12:24 PM 08/10/21 12:24 PM
Joined: Sep 2003 Posts: 20,742 north of coder moparx Buying your homeless and unwanted bolt on battery terminals
moparx Buying your homeless and unwanted bolt on battery terminals Joined: Sep 2003 Posts: 20,742 north of coder	that was an interesting video by mr visard for sure ! thank you for posting !

Re: David Visard on exhaust and mufflers [Re: moparx] #2952473 08/10/21 01:06 PM 08/10/21 01:06 PM
Joined: Oct 2005 Posts: 9,193 Ontario, Canada S Stanton Don't question me!
Stanton Don't question me! S Joined: Oct 2005 Posts: 9,193 Ontario, Canada	When it comes to a street car, many things are more trouble than they're worth. You build a 550 hp motor but the mufflers you use kill 25 hp. Will you really ever notice that ?!?! And was your combo optimal to begin with, with parts that are designed to work together or did you opt for something like a tunnel ram just because you liked the looks. Truthfully, building the optimum system such as Mr Vizards's would be a real pain in the ass and expensive. Assuming everything is carefully chosen right down to the headers, you now have to optimize the collector tubes to the custom expansion box(es). Then find mufflers that flow the necessary CFM. Then there's the issue of fitting all this under the car. Well congratulations. Now someone with a bigger cam comes along and kicks your ass. Its nice to see all this research but applying its is quite another matter.

Re: David Visard on exhaust and mufflers [Re: Stanton] #2952477 08/10/21 01:32 PM 08/10/21 01:32 PM
Joined: May 2011 Posts: 4,492 northern,Ohio,USA C Clanton OP master
Clanton OP master C Joined: May 2011 Posts: 4,492 northern,Ohio,USA	So with all that negativity do you know if it would fit on anyones car?The example in the pic with full exh is a 600hp Vette.I am just making conversation.Here is an exhaust pipe calculator if you want to use it. exh calc Originally Posted by Stanton When it comes to a street car, many things are more trouble than they're worth. You build a 550 hp motor but the mufflers you use kill 25 hp. Will you really ever notice that ?!?! And was your combo optimal to begin with, with parts that are designed to work together or did you opt for something like a tunnel ram just because you liked the looks. Truthfully, building the optimum system such as Mr Vizards's would be a real pain in the ass and expensive. Assuming everything is carefully chosen right down to the headers, you now have to optimize the collector tubes to the custom expansion box(es). Then find mufflers that flow the necessary CFM. Then there's the issue of fitting all this under the car. Well congratulations. Now someone with a bigger cam comes along and kicks your ass. Its nice to see all this research but applying its is quite another matter. Last edited by Clanton; 08/10/21 04:59 PM. GOTBOOST!New improved with Victor heads. http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/

Re: David Visard on exhaust and mufflers [Re: Clanton] #2952563 08/10/21 04:58 PM 08/10/21 04:58 PM
Joined: Jan 2004 Posts: 8,953 fredericksburg,va C cudaman1969 Itch Nutz
cudaman1969 Itch Nutz C Joined: Jan 2004 Posts: 8,953 fredericksburg,va	Old stuff my 1973 Bultaco had one cylinder 1-3/4 header and then the expansion chamber (tapered up to 4-1/2) then outlet pipe was maybe 1-1/8 Last edited by cudaman1969; 08/10/21 05:00 PM.

Re: David Visard on exhaust and mufflers [Re: cudaman1969] #2952639 08/10/21 08:01 PM 08/10/21 08:01 PM
Joined: Jan 2003 Posts: 6,189 Melbourne , Australia LA360 master
LA360 master Joined: Jan 2003 Posts: 6,189 Melbourne , Australia	They did a muffler Dyno shootout in a local magazine many years ago, the Hooker Aero Chamber was the best for both power and torque. This was probably 25 years ago There was a straight through Magnaflow muffler that was quite popular as well, do they still exist? Alan Jones

Re: David Visard on exhaust and mufflers [Re: Stanton] #2961141 09/05/21 05:42 AM 09/05/21 05:42 AM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 master
1Fast340 master 1 Joined: Feb 2007 Posts: 2,578 sweden	Originally Posted by Stanton When it comes to a street car, many things are more trouble than they're worth. You build a 550 hp motor but the mufflers you use kill 25 hp. Will you really ever notice that ?!?! And was your combo optimal to begin with, with parts that are designed to work together or did you opt for something like a tunnel ram just because you liked the looks. Truthfully, building the optimum system such as Mr Vizards's would be a real pain in the ass and expensive. Assuming everything is carefully chosen right down to the headers, you now have to optimize the collector tubes to the custom expansion box(es). Then find mufflers that flow the necessary CFM. Then there's the issue of fitting all this under the car. Well congratulations. Now someone with a bigger cam comes along and kicks your ass. Its nice to see all this research but applying its is quite another matter. Come on,you know better than this. Lets ignore that 25 hp loss,and while we are at it lets leave that stock aircleaner on their,and yeah i know we dont need that roller cam either that gives us alitle more power,and surely we dont need those few hp we get from that aftermarket intakemanifold and,that big old holley is not worth the trouble either so lets keep that that stock carter 600cfm thingy,and why would anyone care to put headers on their car,its just a few hp anyway so lets keep those old manifolds,they tend to fit better anyway,and why on earth would anyone botter to actualy put the effort into get that timingcurve right? Yeah at this point you are pretty much back to a stock engine,just because we didnt bother for those last 25 hp in a bunch of places....

Re: David Visard on exhaust and mufflers [Re: 1Fast340] #2961167 09/05/21 08:31 AM 09/05/21 08:31 AM
Joined: Dec 2007 Posts: 12,594 Great Neck,LI,new york hemi-itis I Live Here
hemi-itis I Live Here Joined: Dec 2007 Posts: 12,594 Great Neck,LI,new york	Interesting vid,I also have the hooker aerochamber mufflers. HEMI-ITIS has no cure. My condition is fully BLOWN!!

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