X74 suspension information request
11-05-2010, 12:17 PM
#16
I suspect the twitchiness in the rear was caused by a problem somewhere. I didn't have any issues with the factory X74 settings. Pretty stable and biased towards understeer at the limit. Even with my new settings at front -1 rear -2, the car feels pretty stable; tends towards understeer at the limit most of the time.
11-05-2010, 12:45 PM
#17
Three Wheelin'
The only way to dial the understeer out is: GT3 lower control arms & more camber... Currently, I am at -2.7 front (GT3 arms front) / -2.3 rear ~ max w/o GT3 arms rear)
11-05-2010, 02:08 PM
#19
On a street car your rears wouldn't last very long with that much camber! Mine didn't
11-05-2010, 02:25 PM
#21
Ironman 140.6
Rennlist Member
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I've had the X74 on my C2 for 2 years and I have driven several 996's and 986's with PSS9's and two 996 GT3's with stock suspensions.
Here's my thoughts.
- The x74 is stiff. Far stiffer than stock US settings and much stiffer than the PSS9 (even with the dampening cranked up). My sense is that it is every bit as stiff as the Mk II 996 GT3. I'm not saying it will outhandle the GT3 as spring stiffness is only one factor (out of many) that must act in harmony with the other suspension components. I'm only trying to say that this system is not for the faint of heart. If you want a system that will transform the handling sharpness and precision of you car this is for you. However, the tradeoff is a big increase ride harshness. You will feel everything, period. Every bump, ripple, and highway expansion joint will be felt. If you are looking for "the look" of a reduced ride height and want some improved handling without that degree of harshness, the PSS9 will probably suit your needs better, however in my opinion I think the x74 is somewhat better than the PSS9 in outright handling and sharpness.
- The big disadvantage of the x74 is lack of adjustability (this could be an advantage depending on how you look at it). The x74 offers no adjustability of the, ride height, dampener settings or the bars. This is bad if you really want to play around with the settings. It's good from the standpoint that Porsche already did that for you so you can't screw it up.
Here's my thoughts.
- The x74 is stiff. Far stiffer than stock US settings and much stiffer than the PSS9 (even with the dampening cranked up). My sense is that it is every bit as stiff as the Mk II 996 GT3. I'm not saying it will outhandle the GT3 as spring stiffness is only one factor (out of many) that must act in harmony with the other suspension components. I'm only trying to say that this system is not for the faint of heart. If you want a system that will transform the handling sharpness and precision of you car this is for you. However, the tradeoff is a big increase ride harshness. You will feel everything, period. Every bump, ripple, and highway expansion joint will be felt. If you are looking for "the look" of a reduced ride height and want some improved handling without that degree of harshness, the PSS9 will probably suit your needs better, however in my opinion I think the x74 is somewhat better than the PSS9 in outright handling and sharpness.
- The big disadvantage of the x74 is lack of adjustability (this could be an advantage depending on how you look at it). The x74 offers no adjustability of the, ride height, dampener settings or the bars. This is bad if you really want to play around with the settings. It's good from the standpoint that Porsche already did that for you so you can't screw it up.
11-05-2010, 04:29 PM
#22
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One thing Ed (Ivangene) told me (when he was active on RL...where the %#!@*$%&!!! is he?) was go for the best. I wanted more cowbell and I realized I would not be happy with ROW M030 or the PSS9/10 route. I would love it for a little bit but would start to think I want more. So I cut out the 2nd step and got the X74.
11-06-2010, 01:09 AM
#23
I suspect the twitchiness in the rear was caused by a problem somewhere. I didn't have any issues with the factory X74 settings. Pretty stable and biased towards understeer at the limit. Even with my new settings at front -1 rear -2, the car feels pretty stable; tends towards understeer at the limit most of the time.
One of the most respected alignment shops in town did my alignment and used the spec's provided previously. After that my rear end would move left to right or right to left at the slightest bump or imperfection in the road.
11-06-2010, 01:45 AM
#24
Three Wheelin'
anybody tried mixing the X74 springs with ROW 030 shocks.... I have ROW 030 and I really like the compromise between track and street... handles really well and car is still usable on a daily basis with no scraping....
I'm curious if the x74 springs would be a good option for ROW 030 shocks in that it would lower the car for the "look" and a bit more handling performance without the extreme harshness of the x74 shocks?
Like Ray said above.... if X74 is like MKII GT3... that is a HARD ride for sure... I would tend to agree...
I'm curious if the x74 springs would be a good option for ROW 030 shocks in that it would lower the car for the "look" and a bit more handling performance without the extreme harshness of the x74 shocks?
Like Ray said above.... if X74 is like MKII GT3... that is a HARD ride for sure... I would tend to agree...
11-06-2010, 02:01 AM
#25
Nordschleife Master
Thread Starter
I don't mind the hard ride. I want something better than what I have. It sounds like X74 is the way to go. If I ever get into tracking the car extensively, by the time I learn enough to need adjustable, I'll be needing new shocks and springs (and probably a hip and new teeth...since it'll take me that long).
11-06-2010, 02:48 AM
#26
Um...that is strange. My x74 is ROCK solid. No twitchiness whatsoever.
Hmmm...not to hijack this thread by any idea what may have caused the excessive twitchiness?
One of the most respected alignment shops in town did my alignment and used the spec's provided previously. After that my rear end would move left to right or right to left at the slightest bump or imperfection in the road.
One of the most respected alignment shops in town did my alignment and used the spec's provided previously. After that my rear end would move left to right or right to left at the slightest bump or imperfection in the road.
11-06-2010, 02:50 AM
#27
What do you have now? If stock, ANYTHING will be better 
I don't mind the hard ride. I want something better than what I have. It sounds like X74 is the way to go. If I ever get into tracking the car extensively, by the time I learn enough to need adjustable, I'll be needing new shocks and springs (and probably a hip and new teeth...since it'll take me that long).
11-06-2010, 09:53 AM
#28
Three Wheelin'
Hmmm...not to hijack this thread by any idea what may have caused the excessive twitchiness?
One of the most respected alignment shops in town did my alignment and used the spec's provided previously. After that my rear end would move left to right or right to left at the slightest bump or imperfection in the road.
One of the most respected alignment shops in town did my alignment and used the spec's provided previously. After that my rear end would move left to right or right to left at the slightest bump or imperfection in the road.
11-06-2010, 10:16 AM
#29
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anybody tried mixing the X74 springs with ROW 030 shocks.... I have ROW 030 and I really like the compromise between track and street... handles really well and car is still usable on a daily basis with no scraping....
I'm curious if the x74 springs would be a good option for ROW 030 shocks in that it would lower the car for the "look" and a bit more handling performance without the extreme harshness of the x74 shocks?
Like Ray said above.... if X74 is like MKII GT3... that is a HARD ride for sure... I would tend to agree...
I'm curious if the x74 springs would be a good option for ROW 030 shocks in that it would lower the car for the "look" and a bit more handling performance without the extreme harshness of the x74 shocks?
Like Ray said above.... if X74 is like MKII GT3... that is a HARD ride for sure... I would tend to agree...
11-06-2010, 01:20 PM
#30
Nordschleife Master
Thread Starter
I've had the X74 on my C2 for 2 years and I have driven several 996's and 986's with PSS9's and two 996 GT3's with stock suspensions.
Here's my thoughts.
- The x74 is stiff. Far stiffer than stock US settings and much stiffer than the PSS9 (even with the dampening cranked up). My sense is that it is every bit as stiff as the Mk II 996 GT3. I'm not saying it will outhandle the GT3 as spring stiffness is only one factor (out of many) that must act in harmony with the other suspension components. I'm only trying to say that this system is not for the faint of heart. If you want a system that will transform the handling sharpness and precision of you car this is for you. However, the tradeoff is a big increase ride harshness. You will feel everything, period. Every bump, ripple, and highway expansion joint will be felt. If you are looking for "the look" of a reduced ride height and want some improved handling without that degree of harshness, the PSS9 will probably suit your needs better, however in my opinion I think the x74 is somewhat better than the PSS9 in outright handling and sharpness.
- The big disadvantage of the x74 is lack of adjustability (this could be an advantage depending on how you look at it). The x74 offers no adjustability of the, ride height, dampener settings or the bars. This is bad if you really want to play around with the settings. It's good from the standpoint that Porsche already did that for you so you can't screw it up.
Here's my thoughts.
- The x74 is stiff. Far stiffer than stock US settings and much stiffer than the PSS9 (even with the dampening cranked up). My sense is that it is every bit as stiff as the Mk II 996 GT3. I'm not saying it will outhandle the GT3 as spring stiffness is only one factor (out of many) that must act in harmony with the other suspension components. I'm only trying to say that this system is not for the faint of heart. If you want a system that will transform the handling sharpness and precision of you car this is for you. However, the tradeoff is a big increase ride harshness. You will feel everything, period. Every bump, ripple, and highway expansion joint will be felt. If you are looking for "the look" of a reduced ride height and want some improved handling without that degree of harshness, the PSS9 will probably suit your needs better, however in my opinion I think the x74 is somewhat better than the PSS9 in outright handling and sharpness.
- The big disadvantage of the x74 is lack of adjustability (this could be an advantage depending on how you look at it). The x74 offers no adjustability of the, ride height, dampener settings or the bars. This is bad if you really want to play around with the settings. It's good from the standpoint that Porsche already did that for you so you can't screw it up.