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Are the megaphone tips on a header better, worse or no difference than say a straight collector or even a reducing collector size? By reducing i mean it could be 5"or whatever and taper down to say a 4" or even a 3.5" or 3". Also how would these different tips affect things such as scavenging or backpressure? Thanks and you do amazing work.
The experiences I've had with them, they pick up bottom end. Reducing the outlet area reduces the amount of reversion that cam come back at the engine. We did some dynoing on an engine. Collecters were a slight megaphone ending @3.5". We put some 18" collecter extensions on it and picked up about 40ft lbs @3500rpm. The tq pk was at 5500 rpm. So the gains faded away on the way to the tq peak. The tq pk differences were minimal. Pk power was down about 3-4hp.
We unbolted the extensions and bolted on some reverse cone we made up closing it up to 3", the engine picked up about 20ft lbs @ 3500 and then behaved exactly the the extensions after that.
The more necked down they get the low end will get better, I wouldn't go more than an inch of reduction, eventually your pk tq and power will drop off hard.
Much lighter than collecter extensions for sure.
 

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New stainless hot side , or fairly new .

Had to change the bellows to double slip joints .

No idea that stainless can move that much , but one of the bellows failed !

I built them , but did not do the final welds ...... as Im no welder . :)


[/url]stainlessheaders by David Cedoz, on Flickr[/IMG]


[/url]merge2 by David Cedoz, on Flickr[/IMG]


[/url]merge by David Cedoz, on Flickr[/IMG]
 

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Well it seems I can not post pictures or images,??
Help anyone. Page says I MAY Not post images, ??
__________________
Calvin Elston
Elston Exhaust Inc.
Matthews NC 28104
Web: www.elstonheaders.com
Blog: www.exhausting101.com


Go to the site 'post image': https://postimages.org/
set the size for message boards and upload your picture.
It will generate some computer code. Pick the code for 'message boards and copy the link (the little icon at the right of it)
then come on here and paste the link into your post.

Click Go Advanced to preview it before you post it.
That's how I do it, anyway!
 

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Ok, hope this works.
A 95 or so Chev Tahoe 2door with full custom frame, CBB 460", Headers are 421 and [email protected]" and 2.25x10" Secondary with a 2.5" choke.3.00" 18ga tailpipes with H-Pipe, Magnaflow 3 chamber XL Turbo mufflers 18" case and some boom tubes out the side. The magnflow XL Turbos are my favorite muffler right now. They are available @ 14or 18 inches and I think there is even a longer case available like for a longer truck or whatever. They may give up a bit of power at the very top of power band but they sound great, do not resonate much at all, and are available in Stainless. Another thing folks never get to realize is using 18 ga on systems has a different sound than most sytems using 16 ga tubing.:cool:






 

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Ok, hope this works.

A 95 or so Chev Tahoe 2door with full custom frame, CBB 460", Headers are 421 and [email protected]" and 2.25x10" Secondary with a 2.5" choke.3.00" 18ga tailpipes with H-Pipe, Magnaflow 3 chamber XL Turbo mufflers 18" case and some boom tubes out the side. The magnflow XL Turbos are my favorite muffler right now. They are available @ 14or 18 inches and I think there is even a longer case available like for a longer truck or whatever. They may give up a bit of power at the very top of power band but they sound great, do not resonate much at all, and are available in Stainless. Another thing folks never get to realize is using 18 ga on systems has a different sound than most sytems using 16 ga tubing.:cool:













Why the boom tubes. Always figured they were for noise but having mufflers too made me question it.

Sent from my XT1650 using Tapatalk
 

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Registered
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198 Posts
Well it seems I can not post pictures or images,??
Help anyone. Page says I MAY Not post images, ??
__________________
Calvin Elston
Elston Exhaust Inc.
Matthews NC 28104
Web: www.elstonheaders.com
Blog: www.exhausting101.com


Go to the site 'post image': https://postimages.org/
set the size for message boards and upload your picture.
It will generate some computer code. Pick the code for 'message boards and copy the link (the little icon at the right of it)
then come on here and paste the link into your post.

Click Go Advanced to preview it before you post it.
That's how I do it, anyway!
Thanks Wolf Wengler, works just fine.
 
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