If you're thinking of backdating & you have SSIs...

[rs6er]

DO IT!

Just backdated my SC, and heat was pouring in during fast idle warmup on a cold day. Only problem now is the left side of the engine compartment looks empty.

[arcsine]

Agreed. I nearly melted a shoe once when I left my heat on to the footwells unknowingly. My left foot was burning long after I shut off the heat.

[81 911 SC]

now you just need to remove the CAT and install a free flow exhaust, if you have not done so already.

[klaucke]

Originally posted by 81 911 SC
now you just need to remove the CAT and install a free flow exhaust, if you have not done so already.

SSI's have no cat(s) and are quite "free flowing" in comparison to some of the stock exhausts used on G-series 911's (i.e., they are in improvement for a 3.0).

[rs6er]

Originally posted by 81 911 SC
now you just need to remove the CAT and install a free flow exhaust, if you have not done so already.

BTDT

[81 911 SC]

thanks I already knew that

[Johnb911]

If you backdate with Autro heat:
How do you control the heater valves??

[rs6er]

Originally posted by Johnb911
If you backdate with Autro heat:
How do you control the heater valves??

Check this thread:

Heater backdate and AC on an SC?

[81 911 SC]

what do you mean by auto heat? Are you referring to the center dial found on the carerras?

[Johnb911]

Yes.

79 sc ROW