Go check your spoiler trim!
05-10-2009, 03:58 PM
#1
Three Wheelin'
Thread Starter
Go check your spoiler trim!
All:
When I had the PPI done on my '96 Carrera 4, the shop noticed a mark on the rear deck. I couldn't figure it out- tried to clean it off to no avail. Drove 600 miles this weekend and when I got home, I noticed the mark was worse. Raised the spoiler and found out what was going on;
Go check yours now!
Cheers,
Paul.
When I had the PPI done on my '96 Carrera 4, the shop noticed a mark on the rear deck. I couldn't figure it out- tried to clean it off to no avail. Drove 600 miles this weekend and when I got home, I noticed the mark was worse. Raised the spoiler and found out what was going on;
Go check yours now!
Cheers,
Paul.
05-10-2009, 05:07 PM
#2
Burning Brakes
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Makes you wonder why it wasn't discovered during the PPI. When I had mine done, that was one of the first things mentioned.
That plastic doesn't seem to hold up well esp with the constant up and down going on. Either leave it up all the time, get a fixed wing spoiler, or get the RUF module.
Mine has broken again. This seems to be a 'normal' and on-going fix it thing. I finally went for the RUF solution as I don't want a fixed wing and don't want it up all the time.
LA freeway stop and go traffic doesn't fit well with an up and down spoiler
That plastic doesn't seem to hold up well esp with the constant up and down going on. Either leave it up all the time, get a fixed wing spoiler, or get the RUF module.
Mine has broken again. This seems to be a 'normal' and on-going fix it thing. I finally went for the RUF solution as I don't want a fixed wing and don't want it up all the time.
LA freeway stop and go traffic doesn't fit well with an up and down spoiler
05-10-2009, 05:18 PM
#4
Burning Brakes
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Sorry I don't have a part number. Very common part; most all dealers carry them. I know Sunset has them. Try Pelican's website for a part number.
It was a little tricky first doing it, but once you do it, you'll do it the second time with ease.
Do a search, I think there recently was a DIY on it with some 'tricks' on making it easier.
....here it is: https://rennlist.com/forums/993-foru...l-tonight.html
It was a little tricky first doing it, but once you do it, you'll do it the second time with ease.
Do a search, I think there recently was a DIY on it with some 'tricks' on making it easier.
....here it is: https://rennlist.com/forums/993-foru...l-tonight.html
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05-10-2009, 05:39 PM
#8
https://rennlist.com/forums/993-foru...er-ribbon.html
(Includes the DIY link)
I just leave my spoiler up for a given drive and drop it when I park for any significant time. Hopefully that will cut down on some wear and tear, and keep the engine a bit cooler too (stop n' go driving, etc.)
05-10-2009, 06:38 PM
#9
Burning Brakes
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It replaces the OEM control module located on the passenger side under the dash; it's an easy 'plug 'n play' and doesn't throw any codes.
It makes the spoiler go up at 75 mph and then down at 45 mph.
edit: I brought it up in that post of yours that mongrelcat mentions above. I went ahead and got one. It works great.
mongrelcat: see my post in that thread. Does keeping it up do anything for cooling? Isn't it just for aerodynamics at higher speeds? And the wall is to force the air into the engine at those high speeds, otherwise no air would get into the motor with the spoiler up. That's what RUF says. When the spoiler is down, the way the air flows over the body it goes into the engine bay. So I guess the other side of it is why not keep it down unless you are driving at high speeds, hence the RUF solution. Am I making sense?
Probably not....
It makes the spoiler go up at 75 mph and then down at 45 mph.
edit: I brought it up in that post of yours that mongrelcat mentions above. I went ahead and got one. It works great.
mongrelcat: see my post in that thread. Does keeping it up do anything for cooling? Isn't it just for aerodynamics at higher speeds? And the wall is to force the air into the engine at those high speeds, otherwise no air would get into the motor with the spoiler up. That's what RUF says. When the spoiler is down, the way the air flows over the body it goes into the engine bay. So I guess the other side of it is why not keep it down unless you are driving at high speeds, hence the RUF solution. Am I making sense?
Probably not....
05-10-2009, 08:02 PM
#11
...
mongrelcat: see my post in that thread. Does keeping it up do anything for cooling? Isn't it just for aerodynamics at higher speeds? And the wall is to force the air into the engine at those high speeds, otherwise no air would get into the motor with the spoiler up. That's what RUF says. When the spoiler is down, the way the air flows over the body it goes into the engine bay. So I guess the other side of it is why not keep it down unless you are driving at high speeds, hence the RUF solution. Am I making sense?
Probably not....
mongrelcat: see my post in that thread. Does keeping it up do anything for cooling? Isn't it just for aerodynamics at higher speeds? And the wall is to force the air into the engine at those high speeds, otherwise no air would get into the motor with the spoiler up. That's what RUF says. When the spoiler is down, the way the air flows over the body it goes into the engine bay. So I guess the other side of it is why not keep it down unless you are driving at high speeds, hence the RUF solution. Am I making sense?
Probably not....
Aside from the matter of whether the spoiler being up pulls fresh air in from the top, I have to think that the effect of "opening up" the engine bay lends to better cooling. Does air pulling though from the underside move up and out the evacuated space in the rear deck when the spoiler is up?
Best bet is to test the theory in hot driving conditions at speeds under 50MPH, but it's only hit 70* up here a few times in the past 6 months...
I guess I could force the issue if I really wanted to test by bringing the temps up with extended idling and then timing how long it takes to drop back to normal operating temps with the spoiler up or down..... (I've tested this way a couple times already to learn about oil levels (higher temps = higher volumes.))In the manual there's a section regarding the dash spoiler warning light in the case of malfunction. It mentions impaired driving stability due to reduction in downforce, it also says:
"Engine cooling may no longer be sufficient; monitor the oil temperature and reduce speed..."
Is also says: "Should the speed-dependent control system fail, the rear spoiler can be extended manually."
To me this says "up is safe."
05-10-2009, 09:18 PM
#13
Burning Brakes
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I did a search for "wall" in 993 forum thread titles a couple weeks back and from what I gather the spoiler being up increases cooling. I could well be wrong, but that is what I took from what I read.
Aside from the matter of whether the spoiler being up pulls fresh air in from the top, I have to think that the effect of "opening up" the engine bay lends to better cooling. Does air pulling though from the underside move up and out the evacuated space in the rear deck when the spoiler is up?
Best bet is to test the theory in hot driving conditions at speeds under 50MPH, but it's only hit 70* up here a few times in the past 6 months... I guess I could force the issue if I really wanted to test by bringing the temps up with extended idling and then timing how long it takes to drop back to normal operating temps with the spoiler up or down..... (I've tested this way a couple times already to learn about oil levels (higher temps = higher volumes.))
In the manual there's a section regarding the dash spoiler warning light in the case of malfunction. It mentions impaired driving stability due to reduction in downforce, it also says:
"Engine cooling may no longer be sufficient; monitor the oil temperature and reduce speed..."
Is also says: "Should the speed-dependent control system fail, the rear spoiler can be extended manually."
To me this says "up is safe."
Aside from the matter of whether the spoiler being up pulls fresh air in from the top, I have to think that the effect of "opening up" the engine bay lends to better cooling. Does air pulling though from the underside move up and out the evacuated space in the rear deck when the spoiler is up?
Best bet is to test the theory in hot driving conditions at speeds under 50MPH, but it's only hit 70* up here a few times in the past 6 months...
I guess I could force the issue if I really wanted to test by bringing the temps up with extended idling and then timing how long it takes to drop back to normal operating temps with the spoiler up or down..... (I've tested this way a couple times already to learn about oil levels (higher temps = higher volumes.))In the manual there's a section regarding the dash spoiler warning light in the case of malfunction. It mentions impaired driving stability due to reduction in downforce, it also says:
"Engine cooling may no longer be sufficient; monitor the oil temperature and reduce speed..."
Is also says: "Should the speed-dependent control system fail, the rear spoiler can be extended manually."
To me this says "up is safe."
05-11-2009, 01:29 AM
#14
Three Wheelin'
I've tested this some before I upgraded to the Ruf Module and I don't think that cooling is an issue at slower speeds, the spoiler position seems to make very little difference, but at high speeds (70+ mph) the spolier does help the cooling. Fortunately that's about the speed the Ruf unit kicks in so as Ruf says the cooling should not be affected.
05-11-2009, 09:43 AM
#15
Race Car
FWIW, If you press the spoiler Up button before you reach 45mph, it will raise the spoiler and keep it up there. This will stop the constant up/down motion when you are in traffic.