I feel almost stupid for not thinking of this sooner.

How many times have you gone to install an aftermarket turbo only not have enough room for the downpipe you want to install? What if the turbo is tight to the firewall, and you can't get 4" all the way to the turbo without a really nasty bend?

Well, it just so happens I was surfing the Dr. Gas website the other night. You may have heard of them because they make the oval exhaust tubes for NASCAR. They make oval tubing, adapters, mufflers, ultra-low-ground clearance stuff, etc. Suffice it to say, they are about as advanced as exhaust technology presently can get. They are *the* leader is racing exhaust.

It turns out they have an oval exhaust tubing that's the same cross-sectional area as a 4" round pipe. LIke this:



NOw it just so happens that they make round-to-oval transitional bends that preserve all your flow area, but can bend very tight-- as tight as radius=diameter! So you have a 4" pipe, they can do a 4" bend radius!

They look like this:



Now, the bends in the picture are oriented 90º wrong, but they are willing and able to change the orientation, just call them up.

This could really help with packaging considerations with twins setups, if you employed oval tubing in the hot and cold piping. Tight radius bends flow a LOT better in a flat tube than a round tube, given identical sectional areas.


Justin

 

I like the out-side the box thinkin HOHN
Your probably on to something here, I still prefer the solution of mounting a huge honkin turbo with a 5" outlet a little below the smaller one so it has no clearance issues but if you really want to run a single thats got to be tried. A outlet flange should be no big deal to have fabbed up?

 

i love the idea the only problem is those pieces are 104$ a bend

 

If you locate the bottom turbo correctly, the 5" flows all the way out the back.

I have used ovals in the past in street rods. I will using it again when I get the 455 in the Firebird...

Dave