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 08/10/2108:10 AM08/10/2108:10 AM
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.
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 08/10/2109:56 AM08/10/2109:56 AM
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.
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 08/10/2101:24 PM08/10/2101:24 PM
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 08/10/2102:32 PM08/10/2102:32 PM
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.
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 09/05/2106:42 AM09/05/2106:42 AM
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 09/05/2109:31 AM09/05/2109:31 AM
![[Linked Image]](https://i.imgur.com/PFLPZ25.jpg)
![[Linked Image]](https://images.holley.com/aerochamberdiagram19189.jpg)
thank you for posting ! 
