993 Rear Spoiler Mod
#31
Nordschleife Master
Well done - thanks
#32
Drifting
Originally Posted by DanL993
You may have noticed in the latest Panorama there was a Tech Forum question on this spoiler and the "expert" claimed that you couldn't get the spoiler to do what the mod does.
I gave him a short email with this info...we'll see what comes out.
GREAT mod.....my "cafeteria tray" stays down all the time.
BTW I have never heard any rational technical reason why that spoiler was programmed to raise and lower as it does. Lotta speculation but no real firm technical answer. Anyone have the real story?
I gave him a short email with this info...we'll see what comes out.
GREAT mod.....my "cafeteria tray" stays down all the time.
BTW I have never heard any rational technical reason why that spoiler was programmed to raise and lower as it does. Lotta speculation but no real firm technical answer. Anyone have the real story?
#33
Rennlist Member
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
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.
#34
Drifting
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.
#35
#36
Rennlist Member
I recently stumbled across a post by mojorizing showing how to modify the spoiler control module to increase the speed at which the spoiler goes up (and down as well). By swapping out one or two resistors the speed can be raised to anywhere from 60-80mph.
It sounds like it functions pretty much like the RUF version, and a whole lot cheaper for anyone with modest soldering skills and who can read resistor band codes (or use an ohmeter).
See post # 52 in this thread:
https://rennlist.com/forums/993-foru...ections-4.html
It sounds like it functions pretty much like the RUF version, and a whole lot cheaper for anyone with modest soldering skills and who can read resistor band codes (or use an ohmeter).
See post # 52 in this thread:
https://rennlist.com/forums/993-foru...ections-4.html
https://rennlist.com/forums/964-foru...questions.html
And the specific post
https://rennlist.com/forums/964-foru...l#post10038949
#37
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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.
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.
#38
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I recently stumbled across a post by mojorizing showing how to modify the spoiler control module to increase the speed at which the spoiler goes up (and down as well). By swapping out one or two resistors the speed can be raised to anywhere from 60-80mph.
It sounds like it functions pretty much like the RUF version, and a whole lot cheaper for anyone with modest soldering skills and who can read resistor band codes (or use an ohmeter).
See post # 52 in this thread:
https://rennlist.com/forums/964-forum...sections-4.html
It sounds like it functions pretty much like the RUF version, and a whole lot cheaper for anyone with modest soldering skills and who can read resistor band codes (or use an ohmeter).
See post # 52 in this thread:
https://rennlist.com/forums/964-forum...sections-4.html
#39
Rennlist Member
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
https://rennlist.com/forums/964-foru...questions.html
And the specific post
https://rennlist.com/forums/964-foru...l#post10038949
#41
button queen
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.
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.
#42
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.
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.
#43
Rennlist Member
RHD
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!
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!
#44
Addict
Rennlist Member
Rennlist Member
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
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
#45
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?
i always wondered if the spoiler wall channeled cool air into the engine bay?