Twin Turbo Header Design

[Natchamp]

Hey guys, I've officially started the project. I pulled the motor today, took some measurements, and came up with this design for the custom headers I will be making for the twin turbos. What do ya think?

[AirCooledExcellence]

Looks cool Mark,

Just had a look at your site, can't believe what you've done! Nice one!

Cheers

[IMONBOOST]

It looks good, my only worry would be that it looks very close to the heads and there might be some heat transfer. Which is the cheapest CAD software I can get?

[dean]

Where do you get your tubing from? It looks like it is in a tighter radius than I can get.

[bell]

are you going to be able to adjust valves without pulling the exhaust manifolds?
and i too LOVE your old setup......can't wait to see the new

[5axis]

Have you considered hanging them out back, 935 style?

Those things get very, very hot.

[Natchamp]

Thanks all,

Boost, I plan on making het shield to address heat soak issues. The cheapest CAD softwre you can get is free. The program I am using here is ProDeskTop Express, you can down load it at www.ptc.com.

Blown, I am getting my tubing from SPD products 888/778-3312, they have a huge selection. The tubes you see are 2" CLR.

Bell, I will have to drop the headers to adjust valves. Ohhh the price we pay for addictions.

Axix, I did consider mounting them in the back. It just doesn't leave any room for exhaust.

[911pcars]

Natchamp,
The design looks great. I'm jealous of your fabrication skills in putting the pipes together. I would suggest routing the pipes a little further out from the cyl. head area as IMONBOOST recommends (to reduce heat soak) and to make valve adjustment a little less service-intensive. Dropping the exhaust system means dealing with broken exhaust manifold studs. I also realize being an armchair designer is much easier than redrawing/redesigning, so take this with a grain of salt.

To save time in fabricating an effective heat shield, provide about 1.25" of space in front of the valve cover for a set of these (commercial plug).

Sherwood Lee
http://members.rennlist.org/911pcars

[911pcars]

Natchamp,
The design looks great. I'm envious of your fabrication skills in putting the pipes together. I would suggest routing the pipes a little further out from the cyl. head area as IMONBOOST recommends (to reduce heat soak) and to make valve adjustment a little less service-intensive. Dropping the exhaust system means dealing with potential broken exhaust manifold studs. I also realize being an armchair designer is much easier than redrawing/redesigning, so take this with a grain of salt.

To save time in fabricating an effective heat shield, you can provide about 1.25" of space in front of the valve cover for a set of these (commercial plug).

Sherwood Lee
http://members.rennlist.org/911pcars