Blower Motor removal

[Spyder550a2001]

I plan to install headers on my 79SC and want to remove all heating related equipment to save weight. Is the blower motor for blowing fresh air and heated air into the cabin? Can it be removed without effecting engine cooling? Any tips on blocking off the two holes in the bottom left and right sides of the engine compartment, where the warm air from the heat exhangers enters?

Cheers John

[sergeshishik]

I am sorry i can't offer tech advice, my guess is NO the blower has nothing to do with engine cooling. Be ware however that removal of this system may impede your windshield defrosting/defogging. Nothing like driving fast with low visibility?

[smcdermaid]

John,

If you are going to use true headers with no heater box enclosures, then deleting the fan and associated hoses is fine. If you are planning to use SSI's or similar, you will want air flow through them by going to the backdated heat components from the early cars. Do a seach for "backdating heat" or similar.

[slodave]

You can remove your heater blower without it affecting your engine cooling. My car is newer and used a different blower system, but I think that you too, will have to get some hose and maybe one other piece in order the heat to work at all. You will have no heat when the car is idle, but when the car is moving heat will still come into the cabin. Hope this makes some sense.

Dave

[jjrowe]

In summary, you have a couple options:

1. Back date the heater components, this will give you heat in the cabin if your new exhaust still has heat exchangers. This will replace your existing duct work with two new ducts that send hot air directly to the heat exchangers without going up to the aux. fan you are pointing at in the photo. You won't get much heat at idle though.
2. Remove all heat duct work and purchase a cover (they sell this on this site) that fits over the duct work in the lower right hand corner of your photo. If you do not purchase this cover you engine cooling can be compromised due to the air from the fan not being forced over the heads and instead being allowed to escape from the opening you create by removing left hand duct. This cover is just like the one you have on the right hand side of the fan housing. You will now have no heat.

Hope this makes sense.

Jesse
76 911S

[75-911S]

I read somewhere that the blower helped cool the heat exchangers. Does its removal have any appreciable negative effect on them, like their long term life, etc.?
Jack

[slodave]

Originally posted by 75-911S
I read somewhere that the blower helped cool the heat exchangers. Does its removal have any appreciable negative effect on them, like their long term life, etc.?
Jack

It could only help cool if the blower is on. In most places the heater stays off 3/4 of year or more and there have been no ill effects. The exchangers are also exposed to outside air from underneath the car. I don't think it makes a difference.

Dave

[jjrowe]

Yeah, I can't imaging that the fan would make any difference as far as the life of your heat exchangers. I back dated my heat some time ago and it worked out well, though I never really need heat in San Diego .

Jesse
76' 911S