Lowering kit
JSUsaxman
02-09-2005, 10:57 AM
i have a 99 gt and i would like to lower it. if anyone knows around about all the parts i would need and maybe some good brands that would be great. thanks
BIG-L
02-09-2005, 11:41 AM
i have a 99 gt and i would like to lower it. if anyone knows around about all the parts i would need and maybe some good brands that would be great. thanks
If I where to buy some spring's to lower my GTP again, id go with Vogtland.Ive read alot about them and how well the ride is after installing them
http://www.ajusa.com/cgi-bin/vogtland/products?ajr_skey=7074001af09d8904bad023bd79e2a94f
http://search.yahoo.com/search?fr=slv1-&p=vogtland+springs
~Larry~
Here is some info on the company and there springs.
Vogtland Springs
Vogtland springs are 100% German made. Vogtland meets the high German product standards of TUV, ISO 9001 (DQS), VDFI, IQNET certified management system and VDAT (Society of German Automobile Tuners). When a vehicle is equipped with Vogtland performance lowering springs there are several elements that improve the overall handling. Vogtland lowering is designed to take advantage of the existing suspension geometry to optimize the relationship of the roll center axis relative to the center of gravity of the vehicle.
Vogtland’s ICS (Inertia Control System) technology is utilized to provide a non-compromising performance ride. By utilizing “compound rate” springs the unsprung mass of the vehicle is controlled and the inertia of the suspension components do not exceed the springs’ capacity to control the jounce loads, hence eliminating the requirement for excessive spring rates. The initial rate is designed to provide the O.E. spring pre-load when the suspension is at full rebound. When the suspension is functioning in its normal operating range the springs “compound rate” provides a controlled performance ride but offers enough compliance to maintain occupancy comfort.
The working range of the spring provides for predictable linear rate increase during the compression stroke. This eliminates unpredictable handling characteristics (i.e. corner entry understeer and corner exit oversteer) normally associated with a progressive spring. Vogtland’s optimized spring calibration also reduces the pitch of the vehicle under heavy acceleration or braking. The increased rate of the springs reduce the load transfer to the front tires during heavy braking. This reduces the longitudinal pitch of the vehicle, resulting in improved overall braking efficiency.
The proportionate increase in spring rate also reduces body roll, which limits adverse suspension movement. This confines the suspension geometry to stay within parameters that enhance the tires contact patch relative to the road. The result is improved vehicle cornering and handling, because front and rear tire loading is more evenly distributed. Therefore, higher cornering limits can be achieved because the built-in understeer characteristics are reduced and provide for a more neutral yet safe handling vehicle.
These springs are manufactured utilizing Vogtland’s proprietary suspension grade “VVS” spring alloy. Vogtland uses a thinner wire diameter for their springs which intern helps them oscilate at a higher rate. The thinner diameter wire accounts for the decrease in spring weight. Vogtland’s VVS alloy is used exclusively in all our applications. Vogtland’s racing springs are used by all the Nascar Teams, including most of the Winston Cup Teams, as well as many Formula 1 Teams. By using “VVS” alloy spring weight is reduced up to 30% over conventional suspension spring materials. This results in reduced unsprung weight and reduces the suspension inertia allowing the suspension to react more quickly to road surface irregularities, hence providing additional traction.
Vogtland springs are produced using special oil tempered spring steels of high tensile strength chrome-silicon and chrome-silicon-vanadium alloys using the cold coiling process. This achieves low spring weight with high material strength, and the desired effect of uniformly reducing the unsprung weight of the vehicle-thereby optimizing the handling characteristics.
If I where to buy some spring's to lower my GTP again, id go with Vogtland.Ive read alot about them and how well the ride is after installing them
http://www.ajusa.com/cgi-bin/vogtland/products?ajr_skey=7074001af09d8904bad023bd79e2a94f
http://search.yahoo.com/search?fr=slv1-&p=vogtland+springs
~Larry~
Here is some info on the company and there springs.
Vogtland Springs
Vogtland springs are 100% German made. Vogtland meets the high German product standards of TUV, ISO 9001 (DQS), VDFI, IQNET certified management system and VDAT (Society of German Automobile Tuners). When a vehicle is equipped with Vogtland performance lowering springs there are several elements that improve the overall handling. Vogtland lowering is designed to take advantage of the existing suspension geometry to optimize the relationship of the roll center axis relative to the center of gravity of the vehicle.
Vogtland’s ICS (Inertia Control System) technology is utilized to provide a non-compromising performance ride. By utilizing “compound rate” springs the unsprung mass of the vehicle is controlled and the inertia of the suspension components do not exceed the springs’ capacity to control the jounce loads, hence eliminating the requirement for excessive spring rates. The initial rate is designed to provide the O.E. spring pre-load when the suspension is at full rebound. When the suspension is functioning in its normal operating range the springs “compound rate” provides a controlled performance ride but offers enough compliance to maintain occupancy comfort.
The working range of the spring provides for predictable linear rate increase during the compression stroke. This eliminates unpredictable handling characteristics (i.e. corner entry understeer and corner exit oversteer) normally associated with a progressive spring. Vogtland’s optimized spring calibration also reduces the pitch of the vehicle under heavy acceleration or braking. The increased rate of the springs reduce the load transfer to the front tires during heavy braking. This reduces the longitudinal pitch of the vehicle, resulting in improved overall braking efficiency.
The proportionate increase in spring rate also reduces body roll, which limits adverse suspension movement. This confines the suspension geometry to stay within parameters that enhance the tires contact patch relative to the road. The result is improved vehicle cornering and handling, because front and rear tire loading is more evenly distributed. Therefore, higher cornering limits can be achieved because the built-in understeer characteristics are reduced and provide for a more neutral yet safe handling vehicle.
These springs are manufactured utilizing Vogtland’s proprietary suspension grade “VVS” spring alloy. Vogtland uses a thinner wire diameter for their springs which intern helps them oscilate at a higher rate. The thinner diameter wire accounts for the decrease in spring weight. Vogtland’s VVS alloy is used exclusively in all our applications. Vogtland’s racing springs are used by all the Nascar Teams, including most of the Winston Cup Teams, as well as many Formula 1 Teams. By using “VVS” alloy spring weight is reduced up to 30% over conventional suspension spring materials. This results in reduced unsprung weight and reduces the suspension inertia allowing the suspension to react more quickly to road surface irregularities, hence providing additional traction.
Vogtland springs are produced using special oil tempered spring steels of high tensile strength chrome-silicon and chrome-silicon-vanadium alloys using the cold coiling process. This achieves low spring weight with high material strength, and the desired effect of uniformly reducing the unsprung weight of the vehicle-thereby optimizing the handling characteristics.
ssfastgp
02-09-2005, 11:50 AM
I prefer the Eibach lowering springs which are availible from PFYC.COM over the other brands. Several members of my car club have used the B&G springs which are also popular on our cars and have switched to the Eibach brand for quality and the overall stance. Whatever brand you choose, make sure if your running an aftermarket wheel and tire that you have a test fit done to make sure there not going to rub with the new springs.
ChrisB-98GrandPrix
02-10-2005, 01:58 PM
If I where to buy some spring's to lower my GTP again, id go with Vogtland.Ive read alot about them and how well the ride is after installing them
Larry, Looking at your signature... do you have a lowering kit on your car? I am also trying to decide if I want to add one. I am thinking about going with 17" (or maybe 18" if they will not rub) rims with something like a 265/45 tire. I am currently stock rims and can see where getting rid of the gap would be nice.
Chris
Larry, Looking at your signature... do you have a lowering kit on your car? I am also trying to decide if I want to add one. I am thinking about going with 17" (or maybe 18" if they will not rub) rims with something like a 265/45 tire. I am currently stock rims and can see where getting rid of the gap would be nice.
Chris
BIG-L
02-10-2005, 02:37 PM
Larry, Looking at your signature... do you have a lowering kit on your car?
Ive got the GMPP koni's.I didnt want a big drop,just a lower stance.It lowers the front .09 / rear .07.The car has settled a bit more since they have been on the car for over 2 years this spring.I really need to get some updated pic's this spring :biggrin:
Stock 4x4 look
http://img.photobucket.com/albums/v285/BIG-L/026_23a.jpg
After W/GMPP koni's
http://img.photobucket.com/albums/v285/BIG-L/011_8a.jpg
Ive got the GMPP koni's.I didnt want a big drop,just a lower stance.It lowers the front .09 / rear .07.The car has settled a bit more since they have been on the car for over 2 years this spring.I really need to get some updated pic's this spring :biggrin:
Stock 4x4 look
http://img.photobucket.com/albums/v285/BIG-L/026_23a.jpg
After W/GMPP koni's
http://img.photobucket.com/albums/v285/BIG-L/011_8a.jpg
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