Whats a good exhaust for me?
#31
#32
It has to do with velocity. (and pressure waves)
Heat any gas and it expands.
Hot gasses better fill the pipe and keep velocity up.
The moving gas has inertia, the same as in an intake.
And you don't want your runners too big or you lose efficiency.
The inverse is also true...
Allowing a gas to expand lowers it's temperature.
Anyone who has used an air tool for a long period of time knows how cold it gets. (the gas expands and returns to atmospheric pressure at the tool)
This is how any mechanical refrigeration works as well.
Heat any gas and it expands.
Hot gasses better fill the pipe and keep velocity up.
The moving gas has inertia, the same as in an intake.
And you don't want your runners too big or you lose efficiency.
The inverse is also true...
Allowing a gas to expand lowers it's temperature.
Anyone who has used an air tool for a long period of time knows how cold it gets. (the gas expands and returns to atmospheric pressure at the tool)
This is how any mechanical refrigeration works as well.
#34
A 3" pipe will flow more than two 2" ones will, if that's what you're asking.
Simple chart available here: How To Calculate Muffler Size and Exhaust Pipe Diameter | Exhaust Videos
Simple chart available here: How To Calculate Muffler Size and Exhaust Pipe Diameter | Exhaust Videos
#35
Glad I found this thread. Don't want to hyjack but I am also in the market for doing my exhaust. And this has had some great info in it! I hope it's ok that I am posting here instead of starting my own thread again, if I am doing it wrong please let me know!
At the moment my stock ypipe is going back in and I need to figure out a good muffler to get. Was looking at a magnaflow so it would sound good and hold up and not be too loud in the cab. If anyone can link me to one they got that would be great! Thanks!
At the moment my stock ypipe is going back in and I need to figure out a good muffler to get. Was looking at a magnaflow so it would sound good and hold up and not be too loud in the cab. If anyone can link me to one they got that would be great! Thanks!
#36
Glad I found this thread. Don't want to hyjack but I am also in the market for doing my exhaust. And this has had some great info in it! I hope it's ok that I am posting here instead of starting my own thread again, if I am doing it wrong please let me know!
At the moment my stock ypipe is going back in and I need to figure out a good muffler to get. Was looking at a magnaflow so it would sound good and hold up and not be too loud in the cab. If anyone can link me to one they got that would be great! Thanks!
At the moment my stock ypipe is going back in and I need to figure out a good muffler to get. Was looking at a magnaflow so it would sound good and hold up and not be too loud in the cab. If anyone can link me to one they got that would be great! Thanks!
After my engine swap, I'll be switching to true dual exaust with a pair of Dynomax Ultraflo mufflers.
http://www.summitracing.com/parts/MPE-12388/
#37
Thanks TexasGuy! I'll have to see which one I will end up with but I"ve got some time to think about it. In the end I want to end up with a catless y pipe and then magnaflow muffler I think. Right now my stock ypipe with cats is quiet enough. Just got that put back on today. Thanks again!
#38
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BRay09
1987 - 1996 F150 & Larger F-Series Trucks
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08-20-2009 01:41 PM