schwartzwest

I have read many times that the rear spoiler deploys at 75 mph. However, this does not appear to be entirely accurate. According to the Product Information booklet from Porsche, it seems that this is only true for the 996. For the 997 (at least the 997.1) it appears the spoiler's function is also a function of the engine compartment temperature, is it will deploy at 50 mph if the engine compartment is warmer.

I'm not sure how common this knowledge is, as I don't recall coming accross this in any of the previous posts I have read on this topic, so I thought I would share it.

Edgy01

I doubt you will ever experience that in Canada! Also, keep in mind that the spoiler deploys at the actual speed of 75 mph and not the INDICATED speed of 75. (There is about a 2 mph difference).

Also, cabriolet tails go up further than the coupe tails--to compensate for the differences in the two roofs.

Perhaps an easier way to remember those two odd numbers (75 and 37.5 mph) is to convert them to metric--and then you'll better understand. 120 kph up and 60 kph down.

cbzzoom

Is there any way to tell when your spoiler is up or down? I can't see it out my rear window and most of the time I forget it's even back there.

LlBr

This is simply ingenious:

GSIRM3

Just curious, how would the spoiler know the car has achieved the actual speed of 75 and not the indicated speed on the speedometer? Are you implying that the spoiler has its own speed sensor?

LlBr

Its a minor detail about speedometers, nothing to do really with spoiler. Mfgrs make sure the speedometers slightly overstate the actual speed of the car - to avoid getting sued.

atr911

I was amazed at how accurate my speedo was. Had the GFs GPS in the car and it was always within 1-2 MPH (we were in the US) of my indicated speed on the speedo.

LlBr

Yup. Very accurate in that it will ALWAYS be saying the car is going faster than actually it is by 1 or 2mph. IOW, It will never say the car is going 55, when it's actually going 56 or more.

GSIRM3

I understand that the speedometer might not indicate the true actual speed of the car, but the original statement was that the spoiler does not deploy at the indicated speed of 75 mph. I would think that if the cars computer is programmed to raise the spoiler at 75 mph, then it goes up when the indicated speed is 75 mph, whether that is the actual speed of the car or not.

Bruce R

This should help, shot this last month. I never knew when it deployed, if at all, now we have proof!
Unfortunately no speed is indicated but if the local constabulary asks I never exceeded 45mph. It can be deployed manually remember

http://www.youtube.com/watch?v=ZBK2NjESdWE

Fin Fever

You can FEEL it. the rear of the car actually gets pushed down by the downward force of the spoiler. It is subtle, but any real porsche enthusiast can feel when that spoiler deploys.

LlBr

Uh..., I guess. Maybe. I was going to say I don't notice it because I'm way too busy looking for cops when the spoiler actuates.

Edgy01

I don't know how Porsche has the spoiler actuator wired (source for speed) but I can tell you that I have roughly a 2 mph optimistic speedo error and the tail doesn't go up until 77--nearly 78 mph INDICATED.

Frino

Mine's always up...

alexb76

I believe in Canadian cars it's deployed at 80 Km/h, had no idea it's dependant on engine tempreture?!