GT3 Suspension Installed
05-06-2012, 11:04 PM
#1
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GT3 Suspension Installed
Installed my refreshed GT3 suspension today.
Only issue I hit was the following:
- The stock GT3 front drop links interfere with the wheel carrier and cannot be used (unless you install the GT3 carrier). Luckily, I happened to have an aftermarket adjustable set and installed those instead (attached to the pinch bolt).
Thank you to Bilstein, Tarett, and Rennline.
Huge thanks to everyone before me who shared their knowledge regarding this upgrade! Rennlist rocks!
Now, to the track!
Only issue I hit was the following:
- The stock GT3 front drop links interfere with the wheel carrier and cannot be used (unless you install the GT3 carrier). Luckily, I happened to have an aftermarket adjustable set and installed those instead (attached to the pinch bolt).
Thank you to Bilstein, Tarett, and Rennline.
Huge thanks to everyone before me who shared their knowledge regarding this upgrade! Rennlist rocks!
Now, to the track!
05-07-2012, 10:06 AM
#3
Check out the Tarett drop link shock mounts. They correct the geometry of the pinch bolt solution. In particular, the drop link mounted to the pinch bolt is shorter thn optimal, and under certain inputs, the sway bar will exacerbate will lift. I recall that you can verify this by putting the front of the car on jack stands and adding wheel lock. One of the wheels will slightly lift.
I think there are some threads on this, most likely in the racing section as the spec boxsters were the folks that developed the solution. I have some pictures of this on my old car showing huge wheel lift. I'll dig them up and repost a little later.
-td
I think there are some threads on this, most likely in the racing section as the spec boxsters were the folks that developed the solution. I have some pictures of this on my old car showing huge wheel lift. I'll dig them up and repost a little later.
-td
05-07-2012, 11:41 AM
#4
If you can post pictures of the front setup with your drop links, I think that was the tought point indeed.
Did you send your shocks to bilstein for remanufacture ? did you also send the springs ? or just the shocks ?
The 996 stock suspension is too high and too soft, with this setup you will have a lot more fun.
But for daily driving I think the stock suspension does wonder.
Did you send your shocks to bilstein for remanufacture ? did you also send the springs ? or just the shocks ?
The 996 stock suspension is too high and too soft, with this setup you will have a lot more fun.
But for daily driving I think the stock suspension does wonder.
05-07-2012, 12:33 PM
#5
Just curious why you are not using the stock GT3 front sway bar mount collars? That would be more optimal.
Mine only had 1 set of collars that came with my used set. I transferred them to the rears and used the pinch bolt location for awhile until I could locate some GT3 ones.
In my quest, I found that you couldn't buy just the collars from Porsche NA as they didn't even have a separate part number for it. I read somewhere that this was only available through Porsche Motorsports division.
During that quest, I found a Chicago Porsche tuning company that offers aftermarket sway bar mount collars similiar to the stock ones. I forgot the link at the moment but I'm sure you can find them if you do a search.
Mine only had 1 set of collars that came with my used set. I transferred them to the rears and used the pinch bolt location for awhile until I could locate some GT3 ones.
In my quest, I found that you couldn't buy just the collars from Porsche NA as they didn't even have a separate part number for it. I read somewhere that this was only available through Porsche Motorsports division.
During that quest, I found a Chicago Porsche tuning company that offers aftermarket sway bar mount collars similiar to the stock ones. I forgot the link at the moment but I'm sure you can find them if you do a search.
05-07-2012, 01:06 PM
#6
05-07-2012, 01:17 PM
#7
Rocky Mountain High
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What's the difference between the GT3 suspension and the X74 or X73 suspension?
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05-07-2012, 01:32 PM
#8
In a quick nutshell:
GT3 suspension is stiffer(swaybar, dampening, spring rates) and height adjustable so you can corner weight it for hardcore track junkies. It has different swaybar pickup points to use with the GT3 adjustable sway bars.
x74 is more sport tuned for the streets and non adjustable in both factory sway bar and height.
GT3 suspension is stiffer(swaybar, dampening, spring rates) and height adjustable so you can corner weight it for hardcore track junkies. It has different swaybar pickup points to use with the GT3 adjustable sway bars.
x74 is more sport tuned for the streets and non adjustable in both factory sway bar and height.
05-07-2012, 02:23 PM
#9
Rocky Mountain High
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Thanks.
05-07-2012, 03:30 PM
#10
From a 2009 thread on this:
It could be described as good or bad, depending on the setup. On a road course not all corners are identical, and a car might be setup for the majority of corners, resulting in wheel lift in one or two others. In general it is a function of spring rates and antiroll bars. However, as Andy noted, it could also be caused/exacerbated by the setup itself.
When I had this setup (GT3 bars and short drop links), I could lift in virtually any type of corner. Some examples are below. As you can see, the wheel is lifting a lot. It looks like 4-5 inches - AND the rear tire is starting to lift also. This was on Hoosier R6s.
Just to clarify this piont, weight transfer is unavoidable, and not necessarily bad. You can't affect the total amount of weight transer with roll bars or springs or dampers since weight transfer is a function of ride height (center of gravity), wheel base (or width), and acceleration (lat or long). But you can affect the rate of weight transfer and the amount of suspension travel. The critical issue is controlling and utilizing weight transfer to improve handling under braking / cornering / acceleration.
That being said, you would typically want all 4 wheels in contact with the road so that the workload is properly shared. But that is not always possible.
It could be described as good or bad, depending on the setup. On a road course not all corners are identical, and a car might be setup for the majority of corners, resulting in wheel lift in one or two others. In general it is a function of spring rates and antiroll bars. However, as Andy noted, it could also be caused/exacerbated by the setup itself.
That being said, you would typically want all 4 wheels in contact with the road so that the workload is properly shared. But that is not always possible.
05-07-2012, 09:18 PM
#13
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Check out the Tarett drop link shock mounts. They correct the geometry of the pinch bolt solution. In particular, the drop link mounted to the pinch bolt is shorter thn optimal, and under certain inputs, the sway bar will exacerbate will lift. I recall that you can verify this by putting the front of the car on jack stands and adding wheel lock. One of the wheels will slightly lift.
I think there are some threads on this, most likely in the racing section as the spec boxsters were the folks that developed the solution. I have some pictures of this on my old car showing huge wheel lift. I'll dig them up and repost a little later.
-td
I think there are some threads on this, most likely in the racing section as the spec boxsters were the folks that developed the solution. I have some pictures of this on my old car showing huge wheel lift. I'll dig them up and repost a little later.
-td
If you can post pictures of the front setup with your drop links, I think that was the tought point indeed.
Did you send your shocks to bilstein for remanufacture ? did you also send the springs ? or just the shocks ?
The 996 stock suspension is too high and too soft, with this setup you will have a lot more fun.
But for daily driving I think the stock suspension does wonder.
Did you send your shocks to bilstein for remanufacture ? did you also send the springs ? or just the shocks ?
The 996 stock suspension is too high and too soft, with this setup you will have a lot more fun.
But for daily driving I think the stock suspension does wonder.
05-07-2012, 09:21 PM
#14
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Just curious why you are not using the stock GT3 front sway bar mount collars? That would be more optimal.
Mine only had 1 set of collars that came with my used set. I transferred them to the rears and used the pinch bolt location for awhile until I could locate some GT3 ones.
In my quest, I found that you couldn't buy just the collars from Porsche NA as they didn't even have a separate part number for it. I read somewhere that this was only available through Porsche Motorsports division.
During that quest, I found a Chicago Porsche tuning company that offers aftermarket sway bar mount collars similiar to the stock ones. I forgot the link at the moment but I'm sure you can find them if you do a search.
Mine only had 1 set of collars that came with my used set. I transferred them to the rears and used the pinch bolt location for awhile until I could locate some GT3 ones.
In my quest, I found that you couldn't buy just the collars from Porsche NA as they didn't even have a separate part number for it. I read somewhere that this was only available through Porsche Motorsports division.
During that quest, I found a Chicago Porsche tuning company that offers aftermarket sway bar mount collars similiar to the stock ones. I forgot the link at the moment but I'm sure you can find them if you do a search.
05-07-2012, 09:21 PM
#15
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