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Amigo GT500

Eibach Or Bilstein Suspension....

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Anyone has tried any of these? what have been your experience or results?

 

Eibach 35125.713

 

$_12.JPG

 

 

Eibach 35125.712

$_12.JPG

 

BILSTEIN B12 SUSPENSION SET

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Difficult to compare the two since one is a coil-over. When it comes to shocks it also depends on how you plan on driving your car. For a regularly street-driven car, you're probably not going to feel the differences. The spring rates most companies use are pretty close, 450-650 progressive rate in the front 200-300 in the rear. Coil overs can be tailored by using two linear rate springs, effectively turning it into a progressive. Suspension is about balance so the simple addition of a new set of springs and shocks without consideration to the rest of the package is really only a matter of taste. If you want to build a cohesive package that allows your car to perform tailored to your driving style.... now that's a different matter and requires a different approach. I always go for the coil-overs because then you can start working on corner-balancing the car.

 

Reader Note: Im on the fringe when it comes to suspension so what I do is in no way representative of what I think others should do - unless they really like embarrassing exotics in corners rather than in straight lines.

 

Shock Porn:

 

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Thanks Jeff for your answer and opinion. I forgot to describe my situation. I have a Shelby GT500 which came with the SVT PP. I replaced only the springs when I purchased the car almost three years ago. I put the Ford Racing 1.25" lowering spring set M-5300-L. The description of those says: MAY CAUSE A HARSHER RIDING. This is the reason. The riding quality is very bad and you can feel a nasty sound when the vehicle gets a bump or small hole. The other way is getting back the stock springs. The car only has a little over 3K miles so I guess that stock shock absorbers are fine....this would be the cheapest solution. I only drive a car a few miles per month but when I do it I don't like the quality of riding. ....what do you think? coming back to the stock springs?

 

Right now is a Super Snake with wide body kit...

 

Thanks again.....

 

Jorge

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Since ride quality is the main issue, I would ABSOLUTELY NOT recommend a linear spring, the progressives are going to give you the best ride. Frankly, I think returning to the stock springs is your best bet. In addition, any of the sport shocks/struts are going to have a similar effect. Lowering the car decreases the travel the suspension uses as a consequence of lowering the center of gravity. All suspension is a matter of balance and compromise. Ride quality inevitably suffers when you start improving handling. The Performance Package is not terribly uncomfortable and the L springs really don't lower the car too terribly much. But if your not happy with the ride quality as you are I think you have to consider returning it to the way it came. The wide body also suffers from some compromises. Those big meats weigh a TON and its difficult for the suspension to react quickly with that much unsprung weight. Its not spoke of openly, but from a purely performance standpoint the wide body cars are NOT as well balanced as a non-widebody. Over bumps you're still going to feel some harshness simply because when one of those big 345's starts to move OVER the bump, the suspension has a harder time getting it back down to the ground. This also applies to momentum, its tough to get those big boys rolling and harder to slow them down. Traction won't be a problem.

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Since ride quality is the main issue, I would ABSOLUTELY NOT recommend a linear spring, the progressives are going to give you the best ride. Frankly, I think returning to the stock springs is your best bet. In addition, any of the sport shocks/struts are going to have a similar effect. Lowering the car decreases the travel the suspension uses as a consequence of lowering the center of gravity. All suspension is a matter of balance and compromise. Ride quality inevitably suffers when you start improving handling. The Performance Package is not terribly uncomfortable and the L springs really don't lower the car too terribly much. But if your not happy with the ride quality as you are I think you have to consider returning it to the way it came. The wide body also suffers from some compromises. Those big meats weigh a TON and its difficult for the suspension to react quickly with that much unsprung weight. Its not spoke of openly, but from a purely performance standpoint the wide body cars are NOT as well balanced as a non-widebody. Over bumps you're still going to feel some harshness simply because when one of those big 345's starts to move OVER the bump, the suspension has a harder time getting it back down to the ground. This also applies to momentum, its tough to get those big boys rolling and harder to slow them down. Traction won't be a problem.

 

Thanks again Jeff for your wise advise. I just ordered the stock springs. I was agreed with you without knowing about this....the best bet is going to be returning to the stock springs. I will update you as soon as they will be replaced.

 

have a good weekend,

 

Jorge

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I'm in the process of lowering my 09 GT 500 I drive daily. I'm wondering best springs to use to get car with less wheel opening but not to low to ride to rough. Also any suggestions on better traction on takeoffs.

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Depends on how low you want to go and how you drive your car. I doubt there are very many who have tried MORE combinations than I have, but again I'm on the edge when it comes to suspension. A pretty good "average" set of springs, which bring the car down roughly 1.2-1.5 and maintain a good degree of comfort are either the FRPP or Eibach Pro kits. In most cases you shouldn't need to change out struts/shocks, but you should consider C/C plates and relocation brackets.

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Jeff, the shock porn is really good looking. What are they? I am at the point of wanting the next suspension upgrade. I do about 6-8 road track events per year and drive the car to adn from the track as well as on weekends so I am a 'tweener' as far as setup is concerned. I currently have the FRPP Handling pack, adjustable UCA, LCA and PH (and some power mods). Just ordered some Hankook RS-3 and am considering what to do next. I hear good things about a torque arm and am considering coilovers, but haven't done a whole lot of research yet. I saw your post so thought I'd ask your opinion (if you don't mind), realizing that you don't really have enough info here.

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