FlatSix911

Well done - thanks

myflat6

I haven't read much technical detail either. Maybe someone has something to share? However, the basic concept is to provide downforce/stability at high speeds and reduce drag at low speeds. Why they chose the particular speed? The Ruf settings seem to accomplish this better. Aside from some marketing value, It does maintain a clean, uninterrupted teardrop look of the 911. Basically providing function (especially for those autobahn drivers!) for those that do not like the fixed spoiler look

bcameron59

Read somewhere that Porsche originally was going to raise the spoiler at a higher speed where it would become really useful. That was something like 70-80 mph but certainly above the legal speed limit at the time anywhere in the USA and many venues in Europe.

However someone realized that the raised spoiler would then be a dead giveaway that the driver was speeding. So they dropped it to 50mph.

Might be apocryphal but somehow seems strangely plausible.

myflat6

That might be the most believable reason I have heard. Wouldn't be the first time Americans were sold cars modified from their original design to meet our silly regulations.

FLYT993

yes to both.

centerpunch

Here's the correct link for that thread
https://rennlist.com/forums/964-foru...questions.html

And the specific post
https://rennlist.com/forums/964-foru...l#post10038949

_snowbird_

Haha! You might not agree that this is a worthwhile feature, and it does seem gimmicky, but this is the primary reason why cars tuck away their protruding aero bits when they're not needed. Many examples of this from VW/Audi/Porsche/Bugatti/McLaren etc etc.

FWIW - adding 130lbs at the rear at highway speeds is actually pretty significant. It's like having another body sitting in the rear - but only when you need it.

_snowbird_

Yes, the spoiler deployment setting is typically managed by resistors. This is a $2 mod in the VW world. I was biting my tongue when people were suggesting a $200 mod - but at least it would be a little more plug'n'play for those who don't want to get into the wiring themselves (I'm typically in this camp too )

bcameron59

Paul, thanks for catching the bad url, fixed it in my original post. Looks like something went horribly wrong with my cut & paste of url from another post.

Aventy993

Thanks for posting this!

DanL993

BTW we looked into doing the RUF mod on the module as a group buy and found out several things:
1. Since they are not in stock, you have to remove your unit and send it to Germany (at your cost) for WEEKS to get the mod done,
2. I don't believe they warranted the work since they didn't have complete control of the finished product....i.e. your car,
3. It was VERY expensive...can't recall exact cost but WAY too much.

There's thread out there with all the info somewhere.

jansan946

I live in a second ring suburb with a 50 mph speed limit punctuated by traffic lights. The spoiler going up and down like a window shade grew tedious. So I bought a used spoiler module off e-Bay and changed-out the 180 K Ohm resistor for a 50 K Ohm resistor as Mojorizing suggested in his 964 forum post. Now it's up at 70 and down at 30 mph.

Sunset Porsche Parts gives prices for a Spoiler Module: List Price $410.58 Sale Price: $299.36 Core Charge $251.50 for a net out-of-pocket cost of $47.86. That's great if you have a bad module and don't mind the 50/6 mph up and down.

ECU Doctors in Oakland Park, FL will repair your spoiler module for $175. The question is will they modify it to a 70/30 mph unit from 50/6 mph, check function and guarantee it? If I needed another Ruf style module, I would call the company and ask.

Spokes

The up down thing does (did) drive me nuts too. So, I just completed this task. For a RHD, and a slight difference in my module:

1: Module is located on left (passenger side).
2: My module was not screwed in place as OP but fastened to a bracket.
3: Removed plug cover in situ, then secured plugs with tape (took Opo's advice, thanks.)
3: Removed plug in situ (very carefully).
4: Removed plugs #8 and #12 taped back on the loom.
5: Covered the remaining plugs with tape and refastened plug.
6: Removed tape & secured the cover.
7: Tested. Yeah!

Ron

For what is is worth when I did this Group buy along time ago my contact there was Andrew his contact information is below. Not sure it is still current.

ndrew Sampson
Wholesale Parts
Weissach
Authorized Agents / RUF Automobile/ Lotus /Lamborghini
ph 604-738-4434
fx 604-738-8824
1-800-665-6688
www.weissach.com
visit our re designed website

bigrig

for those who have done this mod, do you notice higher oil temps on the highway(than with the spoiler deployed)?
i always wondered if the spoiler wall channeled cool air into the engine bay?