seriously.
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Why round exhaust pipe?
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A circle has the most area for the circumference. More airflow for less steel.My fabulous web page
"If it don't go, chrome it!" --Stroker McGurk
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Because square exhaust clamps wouldn't work right!!Life is short. Be a do'er and not a shoulda done'er.
1969 Galaxie 500 https://bangshift.com/forum/forum/ba...ild-it-s-alive
1998 Mustang GT https://bangshift.com/forum/forum/ba...60-and-a-turbo
1983 Mustang GT 545/552/302/Turbo302/552 http://www.bangshift.com/forum/forum...485-bbr-s-83gt
1973 F-250 BBF Turbo Truck http://www.bangshift.com/forum/forum...uck-conversion
1986 Ford Ranger EFI 545/C6 https://bangshift.com/forum/forum/ba...tooth-and-nail
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I just watched a video on that..but my eliptical internet lost it..have to wait for next july for it to come back.
a tiny squish, lke half inch making an oval, knocked out several cc, and the guy proved it on video with beakers and fluids..and thoroughly explained something simple.
as heat is an ongoing chemical process..round does something for that as well. not just volume of blasting the crap out.
like mandrel at the head..it is a big thing to notice.Previously boxer3main
the death rate and fairy tales cannot kill the nature left behind.
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A corollary to Jim's post is that boundary layer losses in laminar airflow are minimized in a round pipe. That said other concerns can out weigh the round pipe theory. This is usually a situation where packaging, sanctioning body rules or aero concerns have a greater impact on the overall exhaust system.
In my case I used Dr. Gas frame clearance tubes, oval shaped with transitions from round to oval and back in order to squeeze the engine and trans I picked into th car I picked and still maintain some degree of street able ground clearance. Is it ideal, is it a good compromise? IMHO yes. Look at the boom tubes, flat ' mufflers the NASCAR guys use for another example.
BTW Dr. Gas shut down their retail business last year.Last edited by CDMBill; July 28, 2012, 10:10 PM.Drag Week 2006 & 2012 - Winner Street Race Big Block Naturally Aspirated - R/U 2007 Broke DW '05 and Drag Weekend '15 Coincidence?
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Boundary losses should be eliminated in a large enough box
There is a point to my question - I need to lose the pipes from under the IRS on the Corvette, but I'm not looking forward to unflattening side exhaust pipes every time I drive this lowered car into a driveway ramp or speed bump (where it goes under the frame) so - mathmatically speaking, pi *r2 = ~ 5 square inches (on 2 1/2 pipe).... which would be neat if 1 1/4 x 5 side exhaust tips would be no net loss in flow..... unless, of course, there's something I'm missing about airflow of round pipe.Last edited by SuperBuickGuy; July 28, 2012, 10:20 PM.Doing it all wrong since 1966
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Originally posted by SuperBuickGuy View PostWhy round exhaust pipe?
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Originally posted by SuperBuickGuy View PostBoundary losses should be eliminated in a large enough box
......
which would be neat if 1 1/4 x 5 side exhaust tips would be no net loss in flow
I'm getting a chuckle out of this discussion, remember I just put some new front springs in my 55, now I can get under the car without jacking it up firstMy fabulous web page
"If it don't go, chrome it!" --Stroker McGurk
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Originally posted by squirrel View PostA flat box has more boundary loss than a square box.
I'm getting a chuckle out of this discussion, remember I just put some new front springs in my 55, now I can get under the car without jacking it up first
Originally posted by studemax View PostHave you ever considered that the exhaust pipe is round because that's the easiest way to make pipe?Doing it all wrong since 1966
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interesting indeed.. I hadn't ever given it that much thought beyond the diameter.
Price would be my first response - oval tubing is kinda bucks up. I was looking into it for the turbo downpipe on the F250, and got sticker shocked pretty bad. Bad enough to consider yanking the mill and beating the crap out of, errr, clearincing the firewall with a sledge. I found out people were using a portapower with the engine in place.Flying south, with a flock of bird dogs.
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Originally posted by SuperBuickGuy View PostYet if you climb under your house,
But yeah...making a big square duct is easier to branch off of. This has nothing to do with exhaust tubing.My fabulous web page
"If it don't go, chrome it!" --Stroker McGurk
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Originally posted by SuperBuickGuy View PostBoundary losses should be eliminated in a large enough box
There is a point to my question - I need to lose the pipes from under the IRS on the Corvette, but I'm not looking forward to unflattening side exhaust pipes every time I drive this lowered car into a driveway ramp or speed bump (where it goes under the frame) so - mathmatically speaking, pi *r2 = ~ 5 square inches (on 2 1/2 pipe).... which would be neat if 1 1/4 x 5 side exhaust tips would be no net loss in flow..... unless, of course, there's something I'm missing about airflow of round pipe.Drag Week 2006 & 2012 - Winner Street Race Big Block Naturally Aspirated - R/U 2007 Broke DW '05 and Drag Weekend '15 Coincidence?
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Originally posted by squirrel View Postaround here, houses are all built on concrete slabs.
But yeah...making a big square duct is easier to branch off of. This has nothing to do with exhaust tubing.Doing it all wrong since 1966
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