RS heater bypass: myth busted.

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01-30-2012, 04:03 PM

#16

daltvater

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Quote:

Originally Posted by NP993

I have the RS heater piece, and discovered an easy way to make it about 100 percent more effective: put a piece of black tape over the cowl vent during the winter. (The cowl vent is the grille at the back of the hood.)

Quote:

Originally Posted by flying_low

I used the relay bypass to get the full range of the fan working again.

https://rennlist.com/forums/993-foru...pass-tube.html

I also cut the bypass tube on the side to insert the temp coil on the side of it so the CCU sees the correct temperate.

I messed around with both these recommendations and tested both on Saturday. I think and don't quote me on this but once you do the relay bypass you don't want to cover the cowl vent. Covering the cowl increased flow before the relay bypass but decreased it after.

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01-30-2012, 04:52 PM

#17

Quadcammer

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Quote:

Originally Posted by Mark in Baltimore

The above quote is at odds with this quote:

https://rennlist.com/forums/993-foru...oorboards.html

not so good with the jokes, aye?

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01-30-2012, 05:43 PM

#18

Mark in Baltimore

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Quote:

Originally Posted by Quadcammer

not so good with the jokes, aye?

not so good with the humor, aye?

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01-30-2012, 08:46 PM

#19

Al Z

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I also have the carbon fiber fabspeed heater by pass. I walked down to the garage and jumpered out the relay as mentioned. The blowers work at all speed settings now

Thanks for the tip.
Al Z

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01-31-2012, 03:28 AM

#20

Dan V

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There is a section in Streather's 993 Companion book: Additional Engine Cooling. What most people refer to as a heater duct is more accurately called a cooling duct.

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01-31-2012, 10:21 AM

#21

Flying Finn

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Quote:

Originally Posted by Falcondrivr

So I had to drive my car this morning, just before dawn. It was 31 degrees outside. I've been worrying about this day coming because of all the collective wisdom here saying that you don't get decent heat with the RS bypass pipe.

Myth busted. As soon as the car was at operating temp, the heat was pumping out nicely. You don't get the rush of air from the rear heater blower. But the car warmed up so much in about 10 minutes, I had to turn the heat off.

So, if you never drive your car in below freezing temps, don't be afraid to lose the 15 lbs of blower lump in the back....

+1

When I still had my RS heater tube, couple of times I had to use it, it definitely worked. That's why I didn't sell it when I too it off.

No I don't have even the tube anymore so no more heat (needed it once this year...) but A/C is not effected by RS tube or no tube at all, it's a different blower altogether.