Need help with heat

[kinein]

the car is a 86 911 with a 3.6 transplant.
I deleted the a/c compressor, dryer, condensor and a/c lines. Not for weight saving, but for the **** is old reason. I am installing a backdate dash from rennline that deletes the side vents. What do i do with the air hose and foot well blower that feeds the side vents? And what is the best way to keep heat when needed without all the mess.

B&b headers are installed with heat exchange boxes. I would like to have heat without using the foot well blower (want to delete) and the rear engine blower(deleted).

Please advise......

[kinein]

[kinein]

I want to delete housing and keep the levers for a backdate look.

[Tom '74 911]

When my '74 had its original 2.7L with SSIs & backdated heat, it was great. It put out plenty of heat. I've not been able to replicate that w/my 3.6L swap. I have Fabspeed headers w/heat and think the heat box enclosures around the headers just isn't big enough. I tried using just an RS type heater tube but found that the 3.6L engine fan did not create enough pressure for any flow to the cabin. I then installed footwell blowers to help get the flow going but really, it's just lukewarm air at best. Maybe it'd be better if the Fabspeed heater boxes were bigger...

Post back if you find a good solution, because I'd like to know!

Best,
Tom

[AG81]

Originally Posted by kinein

I would like to have heat without using the foot well blowers (want to delete) and the rear engine blower(deleted).

Originally Posted by Tom '74 911

Post back if you find a good solution, because I'd like to know!

I too would like to know......

[OldSpool87]

I plumbed my heat by going right to defrost vents from the chassis tubes. When I pull left lever, I get driver defrost heat. Right lever for passenger. No blowers anywhere. Car is an ‘82 SC.

[Jack Stands]

I think the SSI heat exchangers had plenty of capacity, but were not large enough diameter for the bigger engines? When I used them on my 2.7, I had all the heat/defrost I needed without any blowers and other garbage.

[kinein]

Originally Posted by OldSpool87

I plumbed my heat by going right to defrost vents from the chassis tubes. When I pull left lever, I get driver defrost heat. Right lever for passenger. No blowers anywhere. Car is an ‘82 SC.

Do you mind posting a few pictures?

[fiminod]

I removed the footwell blowers from my '84. Simply disconnected the electrical connection, popped the blowers our of their locations. I then disconnected the original tubing from both sides from inside the trunk (they essentially crumbled). Obtained original Porsche tubing and connected to the outlet from rocker (removing and discarding the rubber sleeve that connected the blower to the rocker) and inserted to the receiver in the trunk. I did a test for without the large rubber grommet that is located in the pass through into the trunk to get an idea of how difficult/easy this would be. Cleaned the grommet and put it back into place then routed the tubing. Passenger side a bit easier than drivers side due to wiring harness on divers side. I found it a bit easier to pre-bend the drivers side and snake through using a clockwise twisting motion as its challenging to get the tubing fully seated on the receiving end. Don't forget to place the clamps on the tubing before seating the ends....I left the footwell controller in place as pulling the levers heats the cabin more han sufficiently. I also removed the carpeting from the fiberglass covers and used carpet ashesive to attach the carpet to the footwell a la the SC models.

[kinein]

This is what happens when you say f#$@ it. Decided to start yanking it completely out.

[AG81]

Originally Posted by kinein

This is what happens when you say f#$@ it.

^
I'm a big fan of saying that and just start in on a number of projects..........

[kinein]

Done

[tdw28210]

I am seriously considering adding something like this to my build. But our winter has been so mild so far I haven't felt a huge need. I've experimented with several types of electric forced air blowers to no great results. These types of gas/diesel heaters have been around for decades and were dealer options back in the day. VW used them too. However, I will probably by a 3 liter tank and go diesel. It just seems to have less "splodey" potential than pulling gas from the tank.

https://www.eberspacher.com/products/fuel-operated-heaters/air-heating/airtronic-d2.html

[911tracker85]

I will be eliminating almost all of my HVAC for my 930 build. has headers with heat exchangers. plan is to only have the little flapper boxes where heat comes out from the rear tunnels. deflect to windshield or feet. no blowers.

I have see a couple pics of this.

good luck.

[MichaelSJackson]

If you have a sun-roof, then crack it open about an inch. The vacuum created by the low pressure air flowing over the curved roof will suck air all the way through the heater system, better than all the blower motors combined. Always surprises my passenger when I do this, but they can feel the heat before I even respond. Still need to direct the heat where desired, so I've kept the collection of tubes behind (in front?) of the dash.

No heat if not moving. Opening side windows doesn't work, because there is no low pressure air on the sides.