Would this exhaust pipe flow enough for my setup?

I still have 10 or 15 that could go away.

When you get to be 40, you learn to hide that fat under all those baggy hawaiian shirts!

 

consider this routing.
run the pipes off the headers then turned 90 degrees right where your subframe connectors. then another 90 going down the rocker panel. get the side pipes and put the full length covers on. put the front turn on for the correct cosmetic look and get a short glass pack to put in the short run along the side then you have the kick out at the rear wheel well.

 

Honestly, I have been thinking about EXACTLY that. Just haven't got the balls to do it yet...

 

.....and you know this how?

 

yep.. me knows. There has been quite a bit of talk/testing about varying locations in the rear since it naturally lends itself to negative pressures which help as well.

I haven't seen anything at all like that before and am curious now. Which models?

 

The newer Chevys and Ford Super Duty's.(with diesels) The Chevy's have a single large diameter bell mouthed pipe, the Ford's have a dual tip with perforations around the pipe just forward of the tip. Many of the big rigs have the same type of exhaust pipes, the 08 Pete we traded in this past year had one, 'cept it was vertical.

 

you don't mean like those cheesy intercooled tips from years past do you?

nm.. I know it's tough to describe with text so I'll study them on the next few that I run across. I have seen a few of those models(my buddy pulls his race sleds with a Ford 350SD/powerstroke).. but just never noticed anything extraordinary with the pipes.

Thanks for the reply.

 

Just come off the headers, make a U turn, then 90* out to the sidepipes. A lot of pipe and turns i know, but a lot of big trucks run the exhaust that way. A single back to the muffler, then a U out and back to just behind the doors, a Y pipe, and vertical stack duals behind the doors.

You could even put a set of bolt on cut outs straight in line with the headers for when you go to the track. Take the block off plates off and have open headers, put them back on to drive home.

 

what about something like this....

 

That's what I've been told and experienced
I put 2 1/2" exhaust and long tube headers, on my 74 Grabber years ago, the bottom end lacked, so some of the old stock cars guys where I worked, pulled the pipes off after the headers and dimpled them in a press, it seemed to help quiet a bit.
They did it to the race cars where we worked, and it worked for me. Or do we need another long drawn out semi-expert opinion.

 

Not sure what tips you're talking about. The Fords have a dual outlet tip with chrome angled tips (mid to late 2000's Super Duty's). The Chevy's (GMC's too) have just a plain jane exhaust pipe with about a 3-1/2" outlet pointing at about a 30* angle out behind the rear tire. It's basically a pipe within a pipe in the front with the outer swedged to form a Venturi where the inner pipe ends. I notice lots of things driving trucks that many people miss.

 

I'm not sure those venturi exhaust tail pipes are for creating negative back pressure for the entire exhaust system. I'm not an expert, but some quick online reading seems to point to using them for lowering exhaust temperature by introducing fresh air.

http://alternativefuels.about.com/od/dieselreviews/ig/2007-Silverado-2500HD-Diesel/07-Duramax-tailpipe-terminator.htm

http://alternativefuels.about.com/od/dieselreviews/fr/07ChevSilverado.htm

 

The inlets for the venturi tips are at the very end of the exhaust, so that explanation makes no sense. Unless there are other inlets upstream.

 

these "intercooled tips" are what you seem to be referring to from a design standpoint. IMHO, Merc is right on target and further.. although only slight.. research seem to indicate that for the diesel world it has to do with particulate reduction more than any form of scavenging.

http://www.borla.com/products/polished_tips.html

I've tried them for performance gain and talked to many a builder(header designers too).. and they're not all that. They're simply another means to allow reverberation to go forward under the vehicles rear end. But I will say that they do reduce reversion somewhat as the waves are held off from reentering the tips at low rpm. But who cares about idle/off idle reversion anyways.

On a truck with much ground clearance and excessive sound control to begin with?.. big whoop if some of the sound travels back underneath the rear. But on a lowered car with a healthy engine?.. they are always going to make the sound more aggressive as they allow it to exit those air vents and travel back underneath. I know this firsthand as I recently rebuilt my exhaust and did custom 3 - 3.5 inch tips over my 3" tailpipes. Until I welded up the seams.. they allowed the sound back under the trucks rear which was contradictory to what I was after in the first place.

Look at it like this. If they really were that good at actually increasing scavenging and promoting increases in flow?.. all the race teams would be using them... all the mfgrs would be using them.. all the industrial equipment would be using them.. and there would be FAR more available in the aftermarket just because of all the copy-cat whores driving the price down even further with 10 different chinese versions being made available on ebay and summit.

 

I was looking forward to a PRODUCTIVE discussion .....until the last line. Good luck.