Costs of GT3 Lower Control Arms
#17
Racer
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Sorry I didn't read the whole post from the start, If you are looking for more camber, as long as it's not more than around 2deg. you can use gt3 camber plates that have been rotated. (Might need some machined spacers). Whole lot cheaper than lower control arms. BTW the cost for one 997 gt3 cup lower control arm complete is around $800.- ea., cheap compared to the street version.
Bernie
Bernie
#18
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I have a 997S and would like to install the GT3 lower control arms on my car to get a bit more camber in the front. I was quoted $1,300 for each control arm by Porsche -- is this realistic? Seems a bit much...
Does anybody know of a cheaper place to get these control arms (for new GT3)?
Thanks for your help!
Does anybody know of a cheaper place to get these control arms (for new GT3)?
Thanks for your help!
So I am getting 996 arms, inner rubber bushing blocks, shims, hardware and the little "arm mount" for the litronic (level sensor) for $750.00. Plus 3-4 hours of labor I guess.
#19
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
First 997s have different front control arms; but can use 996 GT3 control arms in the rear. 997 front arms are longer. You could try to usee 996 GT3 arms in front, but you will need more shims. Make sure you get all the parts:
2 inner halves (same for both sides)
2 outer halves (unique per side due to track arm mount)
4 washers/spacers (2 per control arm for center bolts)
4 nuts (2 per control arm for center bolts)
Leveling headlight shim (1mm, without it you lose self leveling headlights with bi-xenons)
shims of various thickness for camber adjustment
You can get a pair of 997 GT3 control arms with the self leveling shim for $795 from Tagart Engineering. You will need about a 10mm shim pack per side to get over -2 degrees camber. Mount the control arms RSR style: right arm on the left and left arm on the right. Mount the track arms in the offset holes. Otherwise, you will find your caster is out of spec and your tires rub your fender liners. The track arms may also bind up if the control arms are spaced out too far. They are not hard to install. With 2 floor jacks, both sides could easily be done in an hour. You just need to eye how much to turn the tie rod ends out to get the toe close. It will be way off and you could easily feather your tires badly in a just couple of miles if you don't adjust. When I did mine, I had to take 3-4 full turns out of each tie rod. You will need a full alignment after doing this upgrade. Be sure to factor the alignment in your cost.
There are pluses and minuses to doing this over camber plates. Camber plates will be cheaper, but not much. You also can't use gT3 camber plates with regular S or PASM struts. You will need aftermarket plates like Weltmeister (about $500). The down side to camber plates alone is the more you move them in, the less tire clearance you get on the inside. If you get inner rubbing, going with 5mm wheel spacers should take care of it. You won't have any clearance issues with the lower control arms if installed properly and you gain 1 advantage. With the longer control (due to the shims), you gain front track...as much as 2".
2 inner halves (same for both sides)
2 outer halves (unique per side due to track arm mount)
4 washers/spacers (2 per control arm for center bolts)
4 nuts (2 per control arm for center bolts)
Leveling headlight shim (1mm, without it you lose self leveling headlights with bi-xenons)
shims of various thickness for camber adjustment
You can get a pair of 997 GT3 control arms with the self leveling shim for $795 from Tagart Engineering. You will need about a 10mm shim pack per side to get over -2 degrees camber. Mount the control arms RSR style: right arm on the left and left arm on the right. Mount the track arms in the offset holes. Otherwise, you will find your caster is out of spec and your tires rub your fender liners. The track arms may also bind up if the control arms are spaced out too far. They are not hard to install. With 2 floor jacks, both sides could easily be done in an hour. You just need to eye how much to turn the tie rod ends out to get the toe close. It will be way off and you could easily feather your tires badly in a just couple of miles if you don't adjust. When I did mine, I had to take 3-4 full turns out of each tie rod. You will need a full alignment after doing this upgrade. Be sure to factor the alignment in your cost.
There are pluses and minuses to doing this over camber plates. Camber plates will be cheaper, but not much. You also can't use gT3 camber plates with regular S or PASM struts. You will need aftermarket plates like Weltmeister (about $500). The down side to camber plates alone is the more you move them in, the less tire clearance you get on the inside. If you get inner rubbing, going with 5mm wheel spacers should take care of it. You won't have any clearance issues with the lower control arms if installed properly and you gain 1 advantage. With the longer control (due to the shims), you gain front track...as much as 2".
#20
Addict
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
First 997s have different front control arms; but can use 996 GT3 control arms in the rear. 997 front arms are longer. You could try to usee 996 GT3 arms in front, but you will need more shims. Make sure you get all the parts:
2 inner halves (same for both sides)
2 outer halves (unique per side due to track arm mount)
4 washers/spacers (2 per control arm for center bolts)
4 nuts (2 per control arm for center bolts)
Leveling headlight shim (1mm, without it you lose self leveling headlights with bi-xenons)
shims of various thickness for camber adjustment
You can get a pair of 997 GT3 control arms with the self leveling shim for $795 from Tagart Engineering. You will need about a 10mm shim pack per side to get over -2 degrees camber. Mount the control arms RSR style: right arm on the left and left arm on the right. Mount the track arms in the offset holes. Otherwise, you will find your caster is out of spec and your tires rub your fender liners. The track arms may also bind up if the control arms are spaced out too far. They are not hard to install. With 2 floor jacks, both sides could easily be done in an hour. You just need to eye how much to turn the tie rod ends out to get the toe close. It will be way off and you could easily feather your tires badly in a just couple of miles if you don't adjust. When I did mine, I had to take 3-4 full turns out of each tie rod. You will need a full alignment after doing this upgrade. Be sure to factor the alignment in your cost.
There are pluses and minuses to doing this over camber plates. Camber plates will be cheaper, but not much. You also can't use gT3 camber plates with regular S or PASM struts. You will need aftermarket plates like Weltmeister (about $500). The down side to camber plates alone is the more you move them in, the less tire clearance you get on the inside. If you get inner rubbing, going with 5mm wheel spacers should take care of it. You won't have any clearance issues with the lower control arms if installed properly and you gain 1 advantage. With the longer control (due to the shims), you gain front track...as much as 2".
2 inner halves (same for both sides)
2 outer halves (unique per side due to track arm mount)
4 washers/spacers (2 per control arm for center bolts)
4 nuts (2 per control arm for center bolts)
Leveling headlight shim (1mm, without it you lose self leveling headlights with bi-xenons)
shims of various thickness for camber adjustment
You can get a pair of 997 GT3 control arms with the self leveling shim for $795 from Tagart Engineering. You will need about a 10mm shim pack per side to get over -2 degrees camber. Mount the control arms RSR style: right arm on the left and left arm on the right. Mount the track arms in the offset holes. Otherwise, you will find your caster is out of spec and your tires rub your fender liners. The track arms may also bind up if the control arms are spaced out too far. They are not hard to install. With 2 floor jacks, both sides could easily be done in an hour. You just need to eye how much to turn the tie rod ends out to get the toe close. It will be way off and you could easily feather your tires badly in a just couple of miles if you don't adjust. When I did mine, I had to take 3-4 full turns out of each tie rod. You will need a full alignment after doing this upgrade. Be sure to factor the alignment in your cost.
There are pluses and minuses to doing this over camber plates. Camber plates will be cheaper, but not much. You also can't use gT3 camber plates with regular S or PASM struts. You will need aftermarket plates like Weltmeister (about $500). The down side to camber plates alone is the more you move them in, the less tire clearance you get on the inside. If you get inner rubbing, going with 5mm wheel spacers should take care of it. You won't have any clearance issues with the lower control arms if installed properly and you gain 1 advantage. With the longer control (due to the shims), you gain front track...as much as 2".
#21
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I'm considereing Tarett GT3 lower control arms for the front end of my '06 Cayman S. I participate in DE events and run Hoosier tires on my car. I have some questions about your recommendations for these control arms.
What are the advantages of mounting the arms "RSR style" vs. right arm on right and left arm on left. How do you "eye" the toe after installing the arms? What is the maximum negative camber you can attain without spacing the arms out "too far"?
I have a pair of Tarett camber plats that were previously used on a Boxster. They fit the Cayman. Would you use the camber plates with the GT3 control arms?
Thanks for your help.
What are the advantages of mounting the arms "RSR style" vs. right arm on right and left arm on left. How do you "eye" the toe after installing the arms? What is the maximum negative camber you can attain without spacing the arms out "too far"?
I have a pair of Tarett camber plats that were previously used on a Boxster. They fit the Cayman. Would you use the camber plates with the GT3 control arms?
Thanks for your help.
#22
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
You might want to go over to the Planet-9 site and do a search/post for more information on the Cayman S. Several on that list have made the conversion to GT3 LCAs.
#23
Former Vendor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Wow, great information here - I'll use a bit of it to pass on.
Planet 9 is a good reference site; they live and breathe these cars and have quite a few hardcore Cayman guys there -
Planet 9 is a good reference site; they live and breathe these cars and have quite a few hardcore Cayman guys there -
#24
Rennlist Member
Join Date: Sep 2008
Location: Hayward, CA, USA
Posts: 92
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
When you ask for a quote, make sure you get a quote on all the parts:
2 inner control arms halves
2 outer control halves
4 nuts (2 per side)
4 washers (2 per side)
1 headlight adjustment shim (to maintain the auto-headlight leveling with Bi-Xenons), note this shim is around $100
$/shim for 1mm shims
$/shim for 3mm shims
$/shim for 7mm shims
Be also weary about in stock availability and lead times on parts. If you can wait 6 weeks, order all at once. I needed mine with in 2 weeks, so I ended calling all over the country and getting parts from 3 different dealers. No one had all the parts in stock. With the inners, outers, all nuts, washers, 10mm of shim packs per side (includes the special shim for the headlights), shipping from 2 dealers and tax from 1 dealer; the total bill was close to $1000.
The advantage is using these is not just the increase in camber, but also the increase in track. Remember when you do your alignment; the greater the shim pack, the greater the increase in track. Adding shims makes the control arms longer, pushing the tire surface further out away from the chassis. This added track helps with turn-in and weight transfer.
2 inner control arms halves
2 outer control halves
4 nuts (2 per side)
4 washers (2 per side)
1 headlight adjustment shim (to maintain the auto-headlight leveling with Bi-Xenons), note this shim is around $100
$/shim for 1mm shims
$/shim for 3mm shims
$/shim for 7mm shims
Be also weary about in stock availability and lead times on parts. If you can wait 6 weeks, order all at once. I needed mine with in 2 weeks, so I ended calling all over the country and getting parts from 3 different dealers. No one had all the parts in stock. With the inners, outers, all nuts, washers, 10mm of shim packs per side (includes the special shim for the headlights), shipping from 2 dealers and tax from 1 dealer; the total bill was close to $1000.
The advantage is using these is not just the increase in camber, but also the increase in track. Remember when you do your alignment; the greater the shim pack, the greater the increase in track. Adding shims makes the control arms longer, pushing the tire surface further out away from the chassis. This added track helps with turn-in and weight transfer.
#25
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I'm considereing Tarett GT3 lower control arms for the front end of my '06 Cayman S. I participate in DE events and run Hoosier tires on my car. I have some questions about your recommendations for these control arms.
What are the advantages of mounting the arms "RSR style" vs. right arm on right and left arm on left. How do you "eye" the toe after installing the arms? What is the maximum negative camber you can attain without spacing the arms out "too far"?
I have a pair of Tarett camber plats that were previously used on a Boxster. They fit the Cayman. Would you use the camber plates with the GT3 control arms?
Thanks for your help.
What are the advantages of mounting the arms "RSR style" vs. right arm on right and left arm on left. How do you "eye" the toe after installing the arms? What is the maximum negative camber you can attain without spacing the arms out "too far"?
I have a pair of Tarett camber plats that were previously used on a Boxster. They fit the Cayman. Would you use the camber plates with the GT3 control arms?
Thanks for your help.
I am not sure why you would want to run camber plates with GT3 control arms unless you are looking at getting a lot of camber, > 3 degrees. The GT3 stock suspension has adjustable upper mounts that can be turned around to add 2 degrees of negative camber. Those cars come from the factory with able to obtain up to 5 degrees negative camber with just rotating the hats and adding shims. Normally for these cars, you just add shims and when you get out to 12-13mm if you still can't get enough camber, you just flip the mounts around and start measuring your shims again. If you want to use camber plates to adjust camber instead of shims, you might as well not buy GT3 control arms. A GT3 control arm with no shims is exactly the same length as a stock Carrera/Turbo control arm.
#27
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Ed is correct.
You can use the 996 GT3 control arms which are much cheaper. I did the same upgrade on my old 997/4S and used 996/GT3 parts for the project
You can use the 996 GT3 control arms which are much cheaper. I did the same upgrade on my old 997/4S and used 996/GT3 parts for the project