[pzwerner]

My '93 takes a LONG time to warm up. I had the thermostat checked and it is OK. When it is below 20deg out, the heat does not start coming out hot ( but warm) until I'm almost home. My temp gauge rarely gets above the first mark. My previous S2 was the same way. I'm thinking about blocking off a portion of the radiator. Any suggestions ? I'm not taking any long trips in the car again until spring, and my drive home usually takes about 10 min. There was talk in the SCCA Pro series we ran, that some teams were disableing the temp sensor to the spec ECU in order to maintain a richer mixture and get a little more power. Maybe if I could get the car to reach operating temp quicker, I could improve fuel mileage also. I know the cooling system is very efficient on the 968, but this doesn't seem to be an advantage in COLD weather...



Any advice is greatly appreciated !!



P Zwerner

Indiana

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[S_Cal968]

Blocking airflow to the radiator is common for semi-trucks and is also used in Nascar to better control engine temp. It goes w/o saying that you'll have to keep a closer eye on the gauge and to better determine the amount of coverage... <img src="/forum/images/smilies/968/unsure.gif" class="smilie" alt="" />

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[rhudeboye]

My car normally sits for a week or 2 in this kinda weather so I never hop in and go. Its about a minute or 2 idling first, then it takes almost another 5 to warm up. Once I get into it though I get a good blast of heat form the vents. I have found that my car, even after driving for a while, tends to run a bit colder in cold weather. Ive actually watched the needle drop back down after obtaining normal temperature. Could it be that our cars cool too well?

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[94SilverCab]

PZ,



I would guess that your problem is not thermostat, but Heater Control Valve (HCV). This is a very common problem on the 968, and very easy to fix.



As to these cars cooling better than expected, count your blessings, heat is the enemy.



Regards,



Jay

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[SILVY968]

Just as a side note, the 968 Porsche manual says to NOT let the car warm up before driving. My 968 is a DD and every morning I just start her up and go with no ill affects. Any idea why Porsche goes out of its way to ask us to drive cold?

Brian

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[flash]

lol - they wanted to sell more rings?

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[biotechee]

To get the oil circulating as quickly as possible. Get in the car, turn it on, drive it, but do not go to high revs. I've read in many places that keeping a car under 3000 rpms is the way to go until it has sufficiently warmed up (read: up to normal op temps).



Apparently letting the car idle while cold is not good for the circulation....

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[PorscheDude]

I get in and drive.

It was 16 deg. this morning, had in heat about 4 mins.

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[biotechee]

That's quicker than my 2004 daily driver Jetta!!!!

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[PorscheDude]

They dont build'em like they used to...... <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" />

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