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Author Topic: Square tube or rectangle tube exhaust  (Read 2396 times)
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Flipper
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« Reply #15 on: December 04, 2013, 03:26:20 PM »

How much time and effort do you want put in for a finely tuned exhaust.
Agreed and True!
Agreed, They did the calcs for me but they owed me a favor so we worked it out in trade. ........it's a mower for Christ's sake! LOL.....Agreed Al!
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« Reply #16 on: December 04, 2013, 04:02:42 PM »

 twothumbsup
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« Reply #17 on: December 04, 2013, 06:35:44 PM »

My exhaust is rhomboid. I don't know what that is, but I'm sure no one will say it flows better or worse than round.

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« Reply #17 on: December 04, 2013, 06:35:44 PM »

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Egoracing
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« Reply #18 on: December 04, 2013, 08:33:08 PM »

There are headers in racing made from square tubing, Not in NASCAR because in the rules it specifically says round or oval tube. I come from 25+ year background in oval track racing and they tend to make a showing every so often in limited motor classes until rules are made against them. A square tube with the same maximum dimensions as a round tube will have more area inside the tube. Also Square shapes keep air flow laminar and keep turbulence down. That is why Racing series use square and rectangle holes for air to cooling systems. The sets I have seen are VERY crack prone even when well supported.  http://i41.photobucket.com/albums/e286/Pinionangle/header.jpg
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« Reply #19 on: December 05, 2013, 07:15:34 AM »

There are headers in racing made from square tubing, Not in NASCAR because in the rules it specifically says round or oval tube. I come from 25+ year background in oval track racing and they tend to make a showing every so often in limited motor classes until rules are made against them. A square tube with the same maximum dimensions as a round tube will have more area inside the tube. Also Square shapes keep air flow laminar and keep turbulence down. That is why Racing series use square and rectangle holes for air to cooling systems. The sets I have seen are VERY crack prone even when well supported.  http://i41.photobucket.com/albums/e286/Pinionangle/header.jpg
THOSE DIFFENTLY LOOK, WELL, DIFFERENT! IN A STRANGE WAY! LOL
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« Reply #20 on: December 05, 2013, 03:20:54 PM »

THOSE DIFFENTLY LOOK, WELL, DIFFERENT! IN A STRANGE WAY! LOL

YES THEY DO. IVE NEVER SEEN THAT USED BEFORE.
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« Reply #21 on: December 05, 2013, 03:45:56 PM »

YES THEY DO. IVE NEVER SEEN THAT USED BEFORE.



Grub....I am doing Mrs. Digger's Exhaust! LOL....see you Sat? 4pm?
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« Reply #22 on: December 05, 2013, 04:56:38 PM »

 twothumbsup LOL
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« Reply #23 on: December 05, 2013, 05:29:50 PM »

 The flow is supposed to be better but like I said, $$$$, about 3 times the cost of regular headers due to the labor in making them. Again, VERY VERY crack prone. We have raced against them when I was crew chief on a dirt late model and I did not see anything that made me think we were lacking anything using the headers we were running.
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