PASM vs. speed bumps
Thread Starter
Track Day
Joined: Aug 2023
Posts: 15
Likes: 4
PASM vs. speed bumps
Guys, I live in North Virginia -- an area of urban sprawl that has more than its share of speed bumps, speed humps and potholes.
I'm in the market to buy a used 992 as my first Porsche and am concerned about getting a car lowered suspension (from PASM). I had been looking for Carrera 4 and 4Ss without lowered suspension, but it seems like the majority of the used 922s out there have PASM and the associated lowered 10 mm suspension.
What has been your experience with 911s with speed bumps and humps with:
- standard suspension height
- lowered 10 mm height
- lowered 20 mm height
Please let me know!
advTHANKSance
I'm in the market to buy a used 992 as my first Porsche and am concerned about getting a car lowered suspension (from PASM). I had been looking for Carrera 4 and 4Ss without lowered suspension, but it seems like the majority of the used 922s out there have PASM and the associated lowered 10 mm suspension.
What has been your experience with 911s with speed bumps and humps with:
- standard suspension height
- lowered 10 mm height
- lowered 20 mm height
Please let me know!
advTHANKSance
Rennlist Member
Joined: Mar 2022
Posts: 4,044
Likes: 3,106
Guys, I live in North Virginia -- an area of urban sprawl that has more than its share of speed bumps, speed humps and potholes.
I'm in the market to buy a used 992 as my first Porsche and am concerned about getting a car lowered suspension (from PASM). I had been looking for Carrera 4 and 4Ss without lowered suspension, but it seems like the majority of the used 922s out there have PASM and the associated lowered 10 mm suspension.
What has been your experience with 911s with speed bumps and humps with:
- standard suspension height
- lowered 10 mm height
- lowered 20 mm height
Please let me know!
advTHANKSance
I'm in the market to buy a used 992 as my first Porsche and am concerned about getting a car lowered suspension (from PASM). I had been looking for Carrera 4 and 4Ss without lowered suspension, but it seems like the majority of the used 922s out there have PASM and the associated lowered 10 mm suspension.
What has been your experience with 911s with speed bumps and humps with:
- standard suspension height
- lowered 10 mm height
- lowered 20 mm height
Please let me know!
advTHANKSance
Thread Starter
Track Day
Joined: Aug 2023
Posts: 15
Likes: 4
PASM Sport Suspension (Lowered 10mm) -- Option Code 1BV or
PASM Sport Suspension (20 mm Lower) -- Option Code 030 (I found this on the listing for a 2017 C4S -- not sure if it also applies for a 922)
Rennlist Member
Joined: Mar 2022
Posts: 4,044
Likes: 3,106
Tobeit, to clarify, I'm talking about the following entries from the Porsche Finder site:
PASM Sport Suspension (Lowered 10mm) -- Option Code 1BV or
PASM Sport Suspension (20 mm Lower) -- Option Code 030 (I found this on the listing for a 2017 C4S -- not sure if it also applies for a 922)
PASM Sport Suspension (Lowered 10mm) -- Option Code 1BV or
PASM Sport Suspension (20 mm Lower) -- Option Code 030 (I found this on the listing for a 2017 C4S -- not sure if it also applies for a 922)
Pro
Joined: Jun 2019
Posts: 720
Likes: 490
From: Southern California
The lower "sport PASM (SPASM) is not an option on any C4. Both C2 and C4 have the standard PASM which is not lowered beyond the PASM standard height. A C4S could have the SPASM optioned but many will not so be sure you reading the build correctly. It would have to list the "PASM Sport Suspension (Lowered 10mm)" listed on the option sheet which is about a $1k option, otherwise it as well just would have standard PASM
Rennlist Member
Joined: Jun 2006
Posts: 10,188
Likes: 11,178
I have SPASM and I'm lowered by about 20mm. I have to drive through 7 speed bumps to get out of my neighborhood so 14 speed bumps total every drive. I take them at an angle and don't have much issue. I scrape slightly in perhaps one speed bump.
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Thread Starter
Track Day
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Burning Brakes
Joined: Jan 2022
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Likes: 1,287
From: Maryland
I'm in the DMV with SPASM. All speed bumps that I've encountered cleared perfectly with room to spare. I opted for FAL mainly for when entering my office garage (steep ramp) but have not needed it when going over speed bumps.
Racer
Joined: May 2021
Posts: 368
Likes: 117
I wouldn't waste my money on FAL in the DMV. I have a 2022 C2S cabriolet with SPASM and live and I've had no problem at all with any speed bumps in MD, VA or DC. I do have to occasionally attack a driveway/parking lot exit ramp at an angle and sometimes even then scrape a little, but I'm ok with that.
Relatedly, I know there is some controversy/view that SPASM makes the ride quite a bit stiffer--I agree to a certain extent, the ride on this car is noticeably stiffer than it was on my first, 2020 base C2. But it's still fine and, man, does it make the car look meaner, lower slung, faster, racier.
Relatedly, I know there is some controversy/view that SPASM makes the ride quite a bit stiffer--I agree to a certain extent, the ride on this car is noticeably stiffer than it was on my first, 2020 base C2. But it's still fine and, man, does it make the car look meaner, lower slung, faster, racier.
Racer
Joined: Jul 2007
Posts: 250
Likes: 219
From: Arlington, VA
Same for me as Woobiee. I live in NoVa too. SPASM on my C2S plus FAL. FAL is IMHO a lifesaver. I use it all the time. Speedbumps in Arlington area are a mixed bag. Most are reasonable but there is one near our home that's a bitch and FAL is essential for it and for the entrance to our cul de sac. I love FAL. You'll have to pry it from my cold dead hands before I would give it up, it's that good. One time I forgot to use it coming out of a parking lot and heard a slight crunch as the lower plastic splitter scraped the driveway (DUH!!!). Other than that, I'd agree with others that the 10MM drop doesn't create too much of a problem with basic speed bumps but I would absolutely argue that it does make a difference on driveways depending on your approach angle and steepness. If you can find a car with FAL then your concerns will be resolved. If not, then you may, from time to time, get some minor scraping with SPASM. Good luck in your search, it's a tough market for buyers still, not much to choose from and prices seem to still be quite high for good used examples.
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PS: When I scrape my front lip I simply sanded it out smooth again as it typically only roughens up the underside edge.
Last edited by Tobeit; Aug 22, 2023 at 11:40 AM.
