987.2 - Long Tube vs Short Tube Manifolds

[jmcc42uk]

Hi Guys,

Just wondering what the difference is between the two header versions.

Basically I have bought a used Cargraphic 1st gen header (short tube) with HJS cats and I have noticed that the latest version of the header has a long tube design.

Is there a major difference? Why did they change to the long tube design?

Thanks

Jon

[Porsche911R]

More torque on the long tube I think.

But call Jens, he will tell you for sure.

[jmcc42uk]

Yep, I'm in touch with Jens about mapping so will see what he says

Just wondering if there are any flow experts about that can shed light on the pros/cons of each setup?

[jayxx83]

Long generally gives better low end torque. Short more top end power. Also depends on the collector. Are they all 3-1?

Could this Jens map be used on a stock car to release more power? Is it just the throttle body opening to a greater degree with the new software?

[jmcc42uk]

Hi,

Yep, they are 3-1, basically the same as the Fabspeed one here.

http://www.fabspeed.com/987-2-boxster-cayman-sport...

I won't be too disappointed with a top end gain as opposed to midrange torque although midrange is important though and I'm hoping the mapping can smooth things out a bit.

I actually feel that the top end is where is the 987.2 lacked a bit. I was really pleased with the midrange shove.

[Mintbird]

A proper live map on MTO`s Maha dyno which is Jens`mapping partner is 1200-1500 pounds JM, just so you know.

[jmcc42uk]

These are two popular manifold designs from Fabspeed and Cargraphic.

The fabspeed is a short tube and the Cargraphic a long tube......

http://www.teambgb.com/CARGRAPHIC-987-2-LONGTUBE-S...

http://www.fabspeed.com/987-2-boxster-cayman-sport...


There must be arguments for both but why so drastically different?

[Markbarry1977]

Google is the answer.

http://m.autoanything.com/exhausts-mufflers/long-t...

[Mintbird]

My car with my setup last year at 0:10

https://www.youtube.com/watch?v=M5yqvCXesRw&ap...

[Mintbird]

jmcc42uk said:

These are two popular manifold designs from Fabspeed and Cargraphic.

The fabspeed is a short tube and the Cargraphic a long tube......

http://www.teambgb.com/CARGRAPHIC-987-2-LONGTUBE-S...

http://www.fabspeed.com/987-2-boxster-cayman-sport...


There must be arguments for both but why so drastically different?

because fabspeed is ste doesnt even sound like a porsche. just cheaply made straight pipes