Springs and Tracking
One concern I do have is that one of the reviews I read, said something to the effect that as you make the overall suspension stiffer, not just coilovers, but sways, and upgrading all of the linkages, it becomes more difficult to determine when the car will lose grip. The one thing that I do like a lot with the stock setup is I can feel the oversteer coming up, and the car gives me a lot of feedback, so I can recover very often, or no where the limits are and avoid them. Would a very stiff setup make this more difficult to determine?

And Yes, stiffer rear means snappier oversteer....
Cannga the shock has a piston that the seals travel on and over time they wear into the piston. The area where the contact occurs is dependent on the spring height and travel. When you shorten the spring, you thus effectively change the contact points on the piston with the seals. This is what leads to the "shock blowing" i.e. the seals fail and the oil/gas leaks. Now in theory if the shock is relatively fresh, changing the contact area should have minimal effect since the piston/seals have not really worn into each other.
I personally was very happy with the Techarts. In fact my fastest track lap to date in the 997tt was turned on the stock shock + Techart combo. I did switch to the Damptronics though with the thought in mind that Bilstein developed the 997tt, 997Gt3/RS, and 997Gt2 coilovers, and thus should be able to offer the most ideal PASM compatible setup for the 997tt.
Now regarding Motons, JRZ's, etc being able to run different spring rates - this is true because they are also almost inifinitely adjustable for rebound and dampening, and are also often rebuilt/revalved for different rate springs anyway.
I personally was very happy with the Techarts. In fact my fastest track lap to date in the 997tt was turned on the stock shock + Techart combo. I did switch to the Damptronics though with the thought in mind that Bilstein developed the 997tt, 997Gt3/RS, and 997Gt2 coilovers, and thus should be able to offer the most ideal PASM compatible setup for the 997tt.
Now regarding Motons, JRZ's, etc being able to run different spring rates - this is true because they are also almost inifinitely adjustable for rebound and dampening, and are also often rebuilt/revalved for different rate springs anyway.
Brad,
I enjoy reading your comments, and don't worry this won't be a never ending debate. Judging from your car lineup
, the KW you're installing in your Turbo, and your comments, it's not a debate, I am trying to learn from your experience.
While I don't disagree with the technical, and theoretical, concern that with lowering spring, the "dynamics isn't there anymore," what I would like to know is how this translates into real life experience. In what way is it not as good ?
1. Is the track time worse? For example, per eclou's experience, it doesn't seem to be.
2. Per seat of pants impression? If so, how is it better? I am looking more than just "this is stiffer" or it "feels" better.
3. I agree that neutral opinion is hard to get, but the rave reviews on the 2 Turbo with lowering springs were judged by third party: Both Champion and GMG Turbo's were driven by Excellence Magazine's reviewers.
In other words, the difference between lowering spring and coilover comes down to the dampener's behavior, assuming the springs in both setup have equal quality and setting. How does a "better" dampener translate into something an amateur driver with occasional track time feels and benefits from? What adjectives are there besides "stiffer" and "better"?
I enjoy reading your comments, and don't worry this won't be a never ending debate. Judging from your car lineup
, the KW you're installing in your Turbo, and your comments, it's not a debate, I am trying to learn from your experience.While I don't disagree with the technical, and theoretical, concern that with lowering spring, the "dynamics isn't there anymore," what I would like to know is how this translates into real life experience. In what way is it not as good ?
1. Is the track time worse? For example, per eclou's experience, it doesn't seem to be.
2. Per seat of pants impression? If so, how is it better? I am looking more than just "this is stiffer" or it "feels" better.
3. I agree that neutral opinion is hard to get, but the rave reviews on the 2 Turbo with lowering springs were judged by third party: Both Champion and GMG Turbo's were driven by Excellence Magazine's reviewers.
In other words, the difference between lowering spring and coilover comes down to the dampener's behavior, assuming the springs in both setup have equal quality and setting. How does a "better" dampener translate into something an amateur driver with occasional track time feels and benefits from? What adjectives are there besides "stiffer" and "better"?
The biggest problem is that springs & shocks are always designed together to make them perfect.
This is the biggest problems when changing the springs to stock coilover's- the original designed travel in shock is shortened, therefore they are not working as they are supposed to.
This could also cause other issue's like premature wear, but only thing that worries me is that dynamics isn't there anymore.
So for the track use- I would not even consider lower springs to stock shocks, they are more for the looks!
This is the biggest problems when changing the springs to stock coilover's- the original designed travel in shock is shortened, therefore they are not working as they are supposed to.
This could also cause other issue's like premature wear, but only thing that worries me is that dynamics isn't there anymore.
So for the track use- I would not even consider lower springs to stock shocks, they are more for the looks!
Last edited by cannga; May 8, 2008 at 12:15 PM.
Why is it faster eclou? Is it because the Techarts springs are stiffer than Bilstein's? Thanks.
..In fact my fastest track lap to date in the 997tt was turned on the stock shock + Techart combo. I did switch to the Damptronics though with the thought in mind that Bilstein developed the 997tt, 997Gt3/RS, and 997Gt2 coilovers, and thus should be able to offer the most ideal PASM compatible setup for the 997tt.
..In fact my fastest track lap to date in the 997tt was turned on the stock shock + Techart combo. I did switch to the Damptronics though with the thought in mind that Bilstein developed the 997tt, 997Gt3/RS, and 997Gt2 coilovers, and thus should be able to offer the most ideal PASM compatible setup for the 997tt.
for those worried about doing springs alone, consider that even if the stock dampeners wear out prematurely (unlikely in a newer shock, more likely in an older shock which has had the seals wear into the shock piston) you can send the worn dampeners to Bilstein in California for a rebuild for about $100 a corner. They can also change the rates to better match the new springs. Peanuts in costs.
what do you mean by older shock, i have 6000 miles on my car , and am thinking of replacing the springs, so are mine considered older//?
Wow funny to see this thread bumped up again.
I ended up going with the Bilstein Damptronics and GMG sway bars, and probably going to be adding a few more GMG odd bits here and there.
I ended up going with the Bilstein Damptronics and GMG sway bars, and probably going to be adding a few more GMG odd bits here and there.
haha , it was me who restarted this post, as one is supposed to do a search on a topic and use that topic, atleast thats the way i understand. anyways i noticed that lot of the guys here on this forum who have gone with the lowering springs, have eventually switched to coil overs even after their good reviews, i wonder why?
I just did my first track event at Poconos raceway, had a lot of fun. I'm interesting in getting my car lowered, but I dont want to swap out the entire suspension. Are springs a good alternative?
Basically are springs just for looks, or will they improve my handling as well?
Basically are springs just for looks, or will they improve my handling as well?
If you are doing a few track days a year and not going to jump in with both feet lowering springs will be fine because you will be able to enjoy your car 99% of the time on the street and daily road use.
Coil overs are the next logical choice.......
If you start to get more serious about going to the track then a step up from an entry level coil over kit ( PSS damptronic) to a more track friendly set up like a Moton club sport is in order.
Understanding that your car will have to have PASM programmed out of it.
So your warning light isnt coming on all the time.
Motons can be very street friendly but will be more on the agressive side.
First determine how much the car will be used on the track before you sink a ton of money into a suspension you will not be happy with regardless wheter its lowering springs or a complete coil over kit.
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