Your opinion please on a Ypipe variation

1st off we are not selling these. We are looking for a company/manufactuer to carry our designs forward but we are not intending to manufacture. That being said, Is this something that picks your interest? Does it have merit in your eyes? [ame]https://youtu.be/XbfW6JpXA3s[/ame]

Sounds ok on paper I guess, but not likely to have ANY real world performance advantage. forcing the exhaust to make that turn with the insert, would certainly be more restrictive than allowing the exhaust to flow to the path of least resistance, which would be through both pipes.... Just my opinion.

Well, I believe that getting the exhaust out to the atmosphere quickly and with velosity would improve the scavenging. When you have just the cutout uncapped, (like original) you lose velosity and the flow gets lazy. I believe especially in turbocharged applications getting the exhaust out quickly and with velosity is a must. Also I don't think the one turn is much of a restriction. Also the sound and flow is true open exhaust, not a big exhaust leak.

I definatly like the street version. I've been toying with my own home made device to stop the turbulence. Good luck

Did you know about The Ramchargers developed Max Wedge/Hemi exhaust system?

http://www.accurateltd.com/1962-65-Max-Wedge-Complete-Exhaust-System_p_232.html

It appears that you optimized it for the muffler exhaust portion by having the open exhaust make that big turn that was previously noted. The Ramchargers did the opposite.

I would like to see some flow measurements of your insert system. I also wonder if you indeed get an appreciable amount of turbulence in the dead area when the cutout caps are in place.

I like the idea of the inserts but I would turn it around, make the "atmospheric" pipe the straight one and the "muffler path" the one that has a slight bend in it


either way, I don't think this will work out though, with that huge hole right on the joint of the pipe, seems to me that would cause a ton of turbulence and noise no matter what insert you are running

Kevin Jonker said:

Well, I believe that getting the exhaust out to the atmosphere quickly and with velosity would improve the scavenging. When you have just the cutout uncapped, (like original) you lose velosity and the flow gets lazy. I believe especially in turbocharged applications getting the exhaust out quickly and with velosity is a must. Also I don't think the one turn is much of a restriction. Also the sound and flow is true open exhaust, not a big exhaust leak.

Click to expand...

Takes the same amount of work to unbolt three collector bolts as it does to unbolt that cap and insert system, and cheeper.

I like the idea.

DFX, The Ramchargers system looks pretty turbulent to me. When the exhaust hits those end caps, it has to go somewhere. I don't think there is a boundry layer that forms at the Y. Maybe i'm wrong, but I picture water instead of air (since I can picture it) and water being shot down those pipes or any exhaust/muffler with a wall to hit would cause considerable turbulence. Flow measurements would be interesting, but I don't know where to go or how much it would cost. I guess I just look at it and feel like it just makes sense.

Sanderson Headers found out that their roadster headers were getting very hot (discoloring their coating) where the exhaust hit the blockoff cap. So they developed their power caps. Here is their article. For those of you looking at our Lakes-style Limefire and Jayster outside chassis headers for your street rod, I have a tech tip for you that will save you grief, frustration, and possible damage to your headers!

You may know that our outside chassis headers are available with or without connections for an under chassis exhaust system. The ability to have a throaty open exhaust, or a quiet and capped header with an under chassis system, has been something we have offered for as long as we have built these headers.

We have found that if you are using a STOCK or MILD engine in your street rod there is not really an issue following the normal directions for installation. But, if you happen to have an engine with some decent modifications and making pretty good horsepower you might damage the header or header coating at the end of the collector where the under chassis adapter is located. The reason for this problem is the turbulence created in the limited distance of dead space just after the under chassis connection and the end cap on the header (when the header is capped and exhaust gasses are being routed through an under chassis exhaust system). The turbulence in this area causes the EGT's (Exhaust Gas Temperatures) to rise dramatically, which in certain applications could exceed the thermal capacity of the header coating - causing damage and discoloration. The problem only seems to occur on high power engines, and engines which are regularly turning considerable RPM's - but definitely would not hurt, and is also beneficial on all applications.

The solution is relatively simple, but adds slightly to the cost of your headers. What we did was to design a component named the "PowerCaps" to solve this issue. The PowerCap slides into the collector tube and provides a smooth redirection of exhaust gas flow from the collector tube into the under chassis exhaust tubing. The PowerCap bolts securely into your header using the end cap flange, removing the turbulence area. Another benefit of using the PowerCaps is in improved horsepower by improving air flow into the under chassis exhaust.

We will be updating the product details on all of the Limefire and Jayster headers to recommend this component - mostly for those applications making pretty good horsepower. Feel free to ask questions about this product and how it solves problems with Lakes-style headers.

DIYmirage, I have tried to picture how reversing the design would work. It would be like the Ramchargers setup. Also the huge hole is what we have eliminated from the original design. We simply have given the consumer the opportunity to have a short, complete, 100% exhaust route to the atmosphere, (which no one except No Weeds can do at a much higher cost) or you can have a turbulence free straight shot to the muffler.

Replicaracer43, When I used to take my 68 Roadrunner to the drags back in the 70's, I would unbolt the exhaust from the header collectors and roll it up as far as I could then rebolt it with one bolt to give open headers. Then redo everything to go home. I get what your saying, but it seems it would be easier to just use the inserts, plus you have the advantage of blocking off the turbulence from the atmospheric pipe when in street mode. Lastly, if racers did some testing and figured out the best collector length, they could use the y pipe as a collector extention to optimize the torque curve;)

So if you said this in the vid I will see it later when I get home...How much and how long until we can buy it?

We are not able to manufacture it at this time. I am hoping to get enough positive responses to get a manufacturer/company to consider partnering with us. My business partner (who actually builds the prototypes) and I love to look at something and figure out how to improve it, and being automotive nuts, loving the sound of exhaust, it just works for us. We have other designs in the variable flow muffler and electric/manual cutout fields, but this is the simplest to start with.

Kevin Jonker said:

DIYmirage, I have tried to picture how reversing the design would work. It would be like the Ramchargers setup. Also the huge hole is what we have eliminated from the original design.

Click to expand...

im not familiar with the ramcharger exhaust but I can see how it wouldn't be much of an option for you because the way the Y sits now you can cut out a section of exhaust and install this instead, whereas if you run the atmosphere out the other end it would require a custom exhaust. or at least a special Z pipe that would route the muffler path back in line


as for the big hole I was talking about, I meant the hole you cut out of the top of the pipe to view how the inserts sit

Wow my bad, LOL. I should have gotten it the first time

Back in the mid 80's I read an artical about the use of square tubing in exhaust to minimize the turbulace in the exhaust stream. The biggest issue was getting square tube thin enough to save weight but thick enough not to burn thru
Joe

Trying to picture square exhaust tubing... I guess it would work. Seems like the square walls might cause some drag? It would seem that round pipe would cause a cyclonic flow?

not for me. i had cut outs on my dart and hardly ever opened them up.. at the track it ran the same through the full x-pipe 3" exhaust as it did with the cut outs open. after that i just never bothered opening the cut outs anymore.

I would like to see how the car would run with all the exhaust routed out through the atmospheric pipe, (open headers) and carb/timing adjusted for it. I guess the bottom line is we believe that with the right tuning, an open exhaust will create more horsepower than a restricted exhaust. Is it worth the time to retune? That would be up to the individual to ascertain. But most, if not all, gearheads love the sound of true, open headers. That is something only our design can give, in the basic Y Pipe without unbolting the exhaust.