Quick picture of a set of manifolds to suit my M6, imagine tig welding that lot together !! kind of looks like a piece of modern art eh?

 

 

Jeff

 

Nice!

Nice curves

Where would you start when creating them ??

 

Jeff

Must be computer designed.

Reminds me of a swimming squid.

 

Must be computer designed.

 

Nah. They've been making equal length runners like that since year dot. Those in fairness aren't that bad, some are mental. Check out this bag of cats.

Edited March 16, 20178 yr by Stephen

I don't know much but shouldn't the lenght of every pipe be the same?

An improvement over most OEM Cast log manifolds but the manufacturing process is still relatively simple and cheap. Its using Cast flanges that are post-op machined, Pressed Collector. Individual pipe bends, tig welded together. The Bends are a mix of set-bends (Several mandrel bends on a single piece) and individual welded bends. Each runner would be Welded individually in their own Jig, and then the final assembly done at the end into the collector together.

 

At the higher Automotive end, and especially in modern Motorsport its more common to utilise DMLS (Metal 3D Sintered/Printed) and a mix of Mandrel bending and Hydroforming (Forming by Water pressure), where the costs increase exponentially and are setup for bespoke low volume runs with much higher precision requirements.

 

I don't know much but shouldn't the lenght of every pipe be the same?

 

Not necessarily. To take full account of the scavenging affects in the peak rpm range, yes, but with unequal length primaries you can spread your power range over a wider rpm range - more suitable for a road car.

Edited March 16, 20178 yr by Yowser

Yup. Hence the "equal length runners". Getting them to be equal and fit the application is where the spaghetti comes into play.