Adjustable rear spring seats
10-03-2010, 01:06 AM
#21
2nd Gear Member
Join Date: Dec 2006
Location: Tri Cities, TN
Posts: 452
I can sell you only the adjusters if you wish. But you can't use those with a spring not intended for use with them (a coil-over spring) as the car would sit way, WAY too high. But I can get you the springs also. 
And the Steeda adjusters are hugely nicer than the Ground Control stuff IMHO. Their stuff works, though is sometimes crude to say the least. I'm in the midst of having to revalve some "specially valved" Koni's from them for a customer's RX7 because the compression damping is all messed up (and even has a nice wave in the curve). Though I do still have their coil-over sleeves on my Z28 in the front (why not they work and doesn't make sense to replace what isn't a problem).
And the Steeda adjusters are hugely nicer than the Ground Control stuff IMHO. Their stuff works, though is sometimes crude to say the least. I'm in the midst of having to revalve some "specially valved" Koni's from them for a customer's RX7 because the compression damping is all messed up (and even has a nice wave in the curve). Though I do still have their coil-over sleeves on my Z28 in the front (why not they work and doesn't make sense to replace what isn't a problem).
I also have the Eibach rear bump stops which mount over the axle, right under the frame rail. Much nicer than the stock bump stops and they're rather soft, so somewhat progressive. At that, there's a little over an inch between the stop and frame. Not the area of the S197's "best" features.
10-03-2010, 01:31 AM
#22
2nd Gear Member
Join Date: Dec 2006
Location: Tri Cities, TN
Posts: 452
You also have a bit more weight over the front with the s/c so that could be affecting the ride height. The nice thing about springs is you can always resell them. I've tried H&R Race, H&R Sport, Steeda Comp and Steeda Ultralite. They've all resold rather quickly. I'm apprehensive about the ground control setup with eibach springs. I see they don't list rates, only sport/aggressive. I'm not big on eibach products and feel more comfortable with steeda. None of their products have ever let me down and I have plenty of their stuff on my car. I'm actually really happy with my spring setup/rates at the moment but want to replace the dampers.
I plan to swap the d-spec's to something else soon. I'm not happy with the rebound/compression adjustments. It's just a matter of weighing my options of dropping $800 on a set of Koni's along with the adjustable steeda rears for another $300. I'm nearing coilover expense at that point and would rather spend another couple hundred on a coilover setup but it won't be ground control. I've heard good things about the H&R clubsport setup as well as KW's offerings.
I plan to swap the d-spec's to something else soon. I'm not happy with the rebound/compression adjustments. It's just a matter of weighing my options of dropping $800 on a set of Koni's along with the adjustable steeda rears for another $300. I'm nearing coilover expense at that point and would rather spend another couple hundred on a coilover setup but it won't be ground control. I've heard good things about the H&R clubsport setup as well as KW's offerings.
I looked into KW, H&R, Tien, Progress Tech. (and others) and talked to every tech and rep I could, before making my decision on the GC stuff, and glad I did- over 100K mi later. There is nothing crude or second rate about their products what so ever. FWIW, I'm a professional race car fabricator and have built suspensions for some very fast, (300mph+)world record holding cars. That in itself is a very narrow field, and I'm not claiming to be Roman Slobodinsky, but I just want to offer some credibility. I also track my Mustang when I get a chance and the performance is there...I assure you. I'm in no way affiliated with GC. I haven't had a need to speak to Jay or anyone else there for years, although I'm considering some 225# rears just for grins....
If you have any questions, I'd be glad to answer.
10-03-2010, 12:30 PM
#23
5th Gear Member
Join Date: Sep 2007
Location: Nor Cali
Posts: 2,059
You also have a bit more weight over the front with the s/c so that could be affecting the ride height. The nice thing about springs is you can always resell them. I've tried H&R Race, H&R Sport, Steeda Comp and Steeda Ultralite. They've all resold rather quickly. I'm apprehensive about the ground control setup with eibach springs. I see they don't list rates, only sport/aggressive. I'm not big on eibach products and feel more comfortable with steeda. None of their products have ever let me down and I have plenty of their stuff on my car. I'm actually really happy with my spring setup/rates at the moment but want to replace the dampers.
I plan to swap the d-spec's to something else soon. I'm not happy with the rebound/compression adjustments. It's just a matter of weighing my options of dropping $800 on a set of Koni's along with the adjustable steeda rears for another $300. I'm nearing coilover expense at that point and would rather spend another couple hundred on a coilover setup but it won't be ground control. I've heard good things about the H&R clubsport setup as well as KW's offerings.
I plan to swap the d-spec's to something else soon. I'm not happy with the rebound/compression adjustments. It's just a matter of weighing my options of dropping $800 on a set of Koni's along with the adjustable steeda rears for another $300. I'm nearing coilover expense at that point and would rather spend another couple hundred on a coilover setup but it won't be ground control. I've heard good things about the H&R clubsport setup as well as KW's offerings.
10-04-2010, 04:56 PM
#24
1st Gear Member
Join Date: Feb 2010
Location: MI
Posts: 59
You should go into politics. Your talent for self promotion is amazing.
10-04-2010, 05:05 PM
#25
Former Sponsor
Join Date: Sep 2007
Posts: 1,936
Christ--here we go again..... And for about the 300th time I've got some solid footing to stand on with regards to my "self promotion". You just randomly pop up, make claims, get nailed and disappear.
And it is relevant to the subject. GC sold some "specially valved and custom" RX7 parts that suck. The compression changes a ton where Koni Sport singles show very little change to compression when the rebound is changed in OTS form, andit's got strange curves. Further it's a tiny piston shock. We are replacing it with a set of Race inserts for that car that offer rebound and a SEPARATE compression adjuster and a bigger piston. And they are perfect size. I wonder why GC just doesn't use those???? Maybe because they couldn't spin it as "special".
Again, not Mustang related, just the latest happenings with regard to GC and "custom" stuff.
I know I should shut up and let folks screw up, or in your case fool themselves into believing they know all the answers despite any evidence to the contrary.
And it is relevant to the subject. GC sold some "specially valved and custom" RX7 parts that suck. The compression changes a ton where Koni Sport singles show very little change to compression when the rebound is changed in OTS form, andit's got strange curves. Further it's a tiny piston shock. We are replacing it with a set of Race inserts for that car that offer rebound and a SEPARATE compression adjuster and a bigger piston. And they are perfect size. I wonder why GC just doesn't use those???? Maybe because they couldn't spin it as "special".
Again, not Mustang related, just the latest happenings with regard to GC and "custom" stuff.
I know I should shut up and let folks screw up, or in your case fool themselves into believing they know all the answers despite any evidence to the contrary.
Last edited by Sam Strano; 10-04-2010 at 05:07 PM.
10-04-2010, 11:55 PM
#26
2nd Gear Member
Join Date: Dec 2006
Location: Tri Cities, TN
Posts: 452
Christ--here we go again..... And for about the 300th time I've got some solid footing to stand on with regards to my "self promotion". You just randomly pop up, make claims, get nailed and disappear.
And it is relevant to the subject. GC sold some "specially valved and custom" RX7 parts that suck. The compression changes a ton where Koni Sport singles show very little change to compression when the rebound is changed in OTS form, andit's got strange curves. Further it's a tiny piston shock. We are replacing it with a set of Race inserts for that car that offer rebound and a SEPARATE compression adjuster and a bigger piston. And they are perfect size. I wonder why GC just doesn't use those???? Maybe because they couldn't spin it as "special".
Again, not Mustang related, just the latest happenings with regard to GC and "custom" stuff.
I know I should shut up and let folks screw up, or in your case fool themselves into believing they know all the answers despite any evidence to the contrary.
And it is relevant to the subject. GC sold some "specially valved and custom" RX7 parts that suck. The compression changes a ton where Koni Sport singles show very little change to compression when the rebound is changed in OTS form, andit's got strange curves. Further it's a tiny piston shock. We are replacing it with a set of Race inserts for that car that offer rebound and a SEPARATE compression adjuster and a bigger piston. And they are perfect size. I wonder why GC just doesn't use those???? Maybe because they couldn't spin it as "special".
Again, not Mustang related, just the latest happenings with regard to GC and "custom" stuff.
I know I should shut up and let folks screw up, or in your case fool themselves into believing they know all the answers despite any evidence to the contrary.
10-05-2010, 07:42 AM
#27
1st Gear Member
Join Date: Feb 2010
Location: MI
Posts: 59
Did you miss the memo? Sam doesn’t exist in the same reality as everyone else. Its pretty standard thinking for a narcissist.
10-05-2010, 07:49 AM
#29
1st Gear Member
Join Date: Feb 2010
Location: MI
Posts: 59
And it is relevant to the subject. GC sold some "specially valved and custom" RX7 parts that suck. The compression changes a ton where Koni Sport singles show very little change to compression when the rebound is changed in OTS form, andit's got strange curves. Further it's a tiny piston shock. We are replacing it with a set of Race inserts for that car that offer rebound and a SEPARATE compression adjuster and a bigger piston.
10-05-2010, 11:44 AM
#30
Former Sponsor
Join Date: Sep 2007
Posts: 1,936
Wow, just wow. I don't own a shock dyno because I have manufacturers of the dampers, be it Koni, Ohlins, AST, Moton, Bilstein do my revalving and dyno work and so have no reason to have a $5k piece of equipment here. Most use Roehrig dyno's and I have a shock dyno file that's about 1" thick on all kinds of shocks from Penske's for Corvettes to Koni's for Mustangs.
My parts don't need to be ground breaking... and in fact I see no reason to reinvent the the round wheel most of them time. This is a classic case where someone wanted to make something "special" and in doing so chose a base damper with a smaller piston, that can't be valved digressively so they could put their name on it, when a better option (in my humble opinion) existed that has more valving options and a bigger piston.
One damper does not a company make, you are correct. But the RX7 example is another data point to add to the claim that the Mustang dampers from GC are Koni's "for a Mustang" that they specially valve. We know that's not the case they are Koni's adapted for the Mustang from something else, and valved the way GC wants. And I don't see the need to do either, especially when other instances of revalving lead to goofy damping curves and a ton of cross-talk between compression and rebound.
To each his own though--if that's what you want, then ok.
My parts don't need to be ground breaking... and in fact I see no reason to reinvent the the round wheel most of them time. This is a classic case where someone wanted to make something "special" and in doing so chose a base damper with a smaller piston, that can't be valved digressively so they could put their name on it, when a better option (in my humble opinion) existed that has more valving options and a bigger piston.
One damper does not a company make, you are correct. But the RX7 example is another data point to add to the claim that the Mustang dampers from GC are Koni's "for a Mustang" that they specially valve. We know that's not the case they are Koni's adapted for the Mustang from something else, and valved the way GC wants. And I don't see the need to do either, especially when other instances of revalving lead to goofy damping curves and a ton of cross-talk between compression and rebound.
To each his own though--if that's what you want, then ok.