Crazy to try this -- or crazy not to try this?

[LEAKYSEALS951]

Look what just got posted in the classified section for cars!
Based on this design, I'd suggest more zip ties! Is this ducting off a shop vac?

[will hung]

Hey Jack, here are a couple solutions I found looking around.

This isn't the prettiest, but the parts could be found here pretty cheaply, and would lose the weight.



Source:
Heat in mid year (74) with a Varioram

This is by far my favorite, but would involve some creative methods to access the rear tins of the engine if the engine isn't pulled.






Source:
3.6 Conversion - Cabin Heat Set-up

[Elombard]

Yes - that last one is the hidden heat set up very stealthy, clean and light. Also not terribly expensive or difficult if you could attach the heat nozzles to the engine tin your self.

[scarceller]

Love that rear heater outlet setup. Very clean!
One consideration: usually cyl 3&6 (2 at rear) run slightly hotter not sure if pulling air off at those 2 points will make things worse?

[RedCoupe]

The 964 uses a piece of stainless tubing for the air crossover, so the P engineers must have had so me reason to spec a cast piece for the 993. Extra heat in that area compared to the 964?

[will hung]

Originally Posted by RedCoupe

The 964 uses a piece of stainless tubing for the air crossover, so the P engineers must have had so me reason to spec a cast piece for the 993. Extra heat in that area compared to the 964?

it's the way the exhaust is routed.

A 964 uses a similar exhaust as an SC or Carrera, the exhaust wraps around the back of the engine, combines at a crossover pipe, and the cat runs along the exhaust valve cover on the driver's side. A 993 has a true dual exhaust with a crossover section at the front of the engine with 2 cats right below that cast part. So there is significantly more heat there on a stock car.

[will hung]

Originally Posted by Elombard

Yes - that last one is the hidden heat set up very stealthy, clean and light. Also not terribly expensive or difficult if you could attach the heat nozzles to the engine tin your self.

And from a weight distribution, anal-retentiveness standpoint, you are removing weight from the front of the engine (most rearward car-wise) and moving it to the rear of the engine (positioned further forward).

Originally Posted by scarceller

Love that rear heater outlet setup. Very clean!
One consideration: usually cyl 3&6 (2 at rear) run slightly hotter not sure if pulling air off at those 2 points will make things worse?

I would think that it would help. You are forcing air past an area where it would normally hang around.

[Elombard]

"I would think that it would help. You are forcing air past an area where it would normally hang around."

I was thinking the same thing...hmmm I wonder if it would be something to consider for earlier 911s?

[arrivederci]

I bought this piece from Patrick motorsports. It should work for me, although it won't be the cleanest install. I will use SCAT hoses, but the v-ram intake interferes. It will be tight...

I have the big cast aluminum manifold as well, but it am using the older engine mount with an m&k muffler, all bolted up to stock 993 heat exchangers. The muffler doesn't leave room for anything else back behind the bumper...

[arrivederci]

Also still working on the exact plumbing with silicon reducers, couplers, etc.

http://www.siliconeintakes.com/index.php?cPath=14&osCsid=05d2cf8f9cb4e52ed62ba355d0b878f3