Momentum V93 -

[Coss]

It's actually tuned to balance performance for the motor, most stock exhaust manifold aren't, they're just designed to fit; the exception would be the high performance cars like the new Ford GT, the Dodge SRT Hellcat, the Ferraris, and the other exotics. Those are all tuned to the motor they're on.

 

[RSchneider]

There has been a movement for the last 15 years for manufacturers to move away from traditional cast iron manifolds. More and more modern cars use a tuned steel tube design (you want a balance of exhaust pressure for each cylinder as to optimize efficiency for performance and emissions across operating temperature). It consists of a cast or laser cut flange, 409 SS tubing that goes to a collector built into the catalytic converter. From there a down pipe is welded on that terminates with a flange. This ends up being a one piece assembly that includes two O2 sensor ports and air injection. At least four individual parts are now made into one. A cast manifold is cheaper as an individual part but a complete welded sub assembly is cheaper when you count that it does not need to be assembled on the assembly line by hand.

One other reason manufacturers are doing this is because they can get the catalytic converter located closer to the engine. This just allows the cat to warm up quicker. I would assume that Elio is doing the same thing because they need to stick the cat somewhere. You'll see the same type of design for something like a Ford Focus and similar new vehicles.

 

[booboo]

Is this a new E body in these picures? I hadn't noticed a gray one yet after the nose was made more pointed. Could this be the E1b integration vehicle?

Hi Marshall, I believe this was the P5 before the red paint. Notice it does not have the newer unibody frame .

https://www.eliomotors.com/elio-momentum-v24-the-art-of-getting-more-for-less/

 

[booboo]

So you can tune an Elio but you can't tune a fish. Thanks guys.

 

[Coss]

Gee, if all the car makers are making tuned exhaust, I guess there's going to be a lot of aftermarket builders like Borla that are going to be out of business.

 

[booboo]

Business is always on auto cycle.
http://www.drivingessentials.com/Whips.php

 

[RSchneider]

Gee, if all the car makers are making tuned exhaust, I guess there's going to be a lot of aftermarket builders like Borla that are going to be out of business.

It's actually quite simple. Borla devotes the bulk of their business to cat back exhaust systems, accessories and OEM supplier. As for going from the engine to the cat they will do certain products but the problem comes with emissions and getting 50 state legal. Looking at the overall business structure, Borla devotes little to the street header market. It's just not the place to make money. As for the rest, shiny larger diameter and louder exhaust sells.

 

[Coss]

It's appears the walking encyclopedia has all the answers. So from now on, it any one has a car question, ask RSchnieder.
No one else knows any thing.

 

[W. WIllie]

The "header" in my G1 is inside the head. That is mainly for emissions improvement. The #1 CAT bolts directly to the head.
I believe that the Fiesta is that way also.?

 

[Hootersnoocher]

It's appears the walking encyclopedia has all the answers. So from now on, it any one has a car question, ask RSchnieder.
No one else knows any thing.

I'm, I think your nails are showing, meowrrrr