C32 AMG, C55 AMG (W203) 2001 - 2007

Question about RENNTech springs?

Old Nov 16, 2005 | 08:08 AM
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Question about RENNTech springs?

I searched the forum showing that when pople change RENNTech springs, they also change the rear spring pads. Why do we need to do these? Can I use the stock rear spring pads? and What # of spring pads is good for daily driving?

Also, where is the cheapest price to get the RENNTech springs?

I am new to C32, please give me some information

Thanks!!
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Old Nov 16, 2005 | 08:26 AM
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Talk to Neal at Euroteck

Originally Posted by ccw998
I searched the forum showing that when pople change RENNTech springs, they also change the rear spring pads. Why do we need to do these? Can I use the stock rear spring pads? and What # of spring pads is good for daily driving?

Also, where is the cheapest price to get the RENNTech springs?

I am new to C32, please give me some information

Thanks!!
The Renntech springs retail for like $525. Send Neal (BlackC230Coupe) at Euroteck a PM or e-mail. I just spoke with him about various suspension types (KW vs H&R vs Renntech, etc.). Good guy so far.

Website www.EuroteckMotorsports.com
E-Mail info@EuroteckMotorsports.com
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Old Nov 16, 2005 | 07:42 PM
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Some people go with a thinner spring pad in the rear with the Renntechs because they don't drop the rear enough for some peoples tastes.
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Old Nov 16, 2005 | 09:37 PM
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u need to add spring pads to the rear depending on ur personal preference for the rear drop. i installed vogtland springs both front and rear and the gap b/w front and rear are about same distance. some people like the gap tighter on the rear so they add #1 pads to the rear to lower the gap. i think the stock pads for rear are #3.
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Old Nov 18, 2005 | 10:50 AM
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After I install the springs, will it void the factory warranty?
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Old Nov 18, 2005 | 07:26 PM
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any suspension mods would void the warranty on the suspension, but with the RENNTech springs there is no marking on them. They are simply painted black. I had no problem taking the car to service and have them check on suspension problems before.

you can run the stock spring pads in the rear when changing to RENNTech springs. I changed mine to the thinnest spring pads in the rear because I want to have a more even look. Stock pads depending on the car ranges from #2 to #4. C32 used #2 pads, the C240/320 non sport used #4, etc.
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Old Nov 20, 2005 | 12:21 PM
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Originally Posted by ccw998
I searched the forum showing that when pople change RENNTech springs, they also change the rear spring pads. Why do we need to do these? Can I use the stock rear spring pads? and What # of spring pads is good for daily driving?

Also, where is the cheapest price to get the RENNTech springs?

I am new to C32, please give me some information

Thanks!!

I have a set of Renntechs on my car for a while but i took them off.... If you going to have a car for a daily driving, i would not suggest renntechs. They are a very stiff spring and you will feel every little bump. If you live in the city such as boston or NYC, leave your stock suspension setup. You will have to put a #1 pad in the rear to even out the look or else the back will look higher and not even. Good luck!
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Old Nov 21, 2005 | 12:06 AM
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Yes, my car is for daily driving, so what kind of spring should I get? Just want to lower the gap.
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Old Nov 21, 2005 | 06:27 AM
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I drive my car daily...there's nothing wrong with RENNtech springs.
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Old Nov 21, 2005 | 09:27 AM
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Originally Posted by ccw998
Yes, my car is for daily driving, so what kind of spring should I get? Just want to lower the gap.

I'm not saying there is anything wrong with Renntech springs. Everyone has there own taste. Some can bare the stiff ride, some want a more softer ride. I just didnt like the stiff ride that the springs gave me. If I were you, try the renntech springs, they are suppose to be the best on the market. I would go eibach. I had them on my C class. They were very similar to stock and was able to eliminate the gaps.
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Old Nov 23, 2005 | 05:05 PM
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If I put RENN-tech springs on the C55, can I still get by with the 245/35-18 wheels/tires on all 4 corners? I run these on the track with Hoosier tires. The wider front wheel/tire setup seems to help turn-in a lot. I am thinking about the springs to lower the car a little which should give some more negative camber, and to stiffen the suspension especially needed in turns. Any comments/experience with these changes would be appreciated.
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Old Nov 23, 2005 | 05:09 PM
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Originally Posted by dsC32
If I put RENN-tech springs on the C55, can I still get by with the 245/35-18 wheels/tires on all 4 corners? I run these on the track with Hoosier tires. The wider front wheel/tire setup seems to help turn-in a lot. I am thinking about the springs to lower the car a little which should give some more negative camber, and to stiffen the suspension especially needed in turns. Any comments/experience with these changes would be appreciated.

You should be able to run 235/35/18 and 265/30/18 in the rears if you wanted to. Shouldn't be a problem.....
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Old Nov 23, 2005 | 05:46 PM
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Originally Posted by dsC32
If I put RENN-tech springs on the C55, can I still get by with the 245/35-18 wheels/tires on all 4 corners? I run these on the track with Hoosier tires. The wider front wheel/tire setup seems to help turn-in a lot. I am thinking about the springs to lower the car a little which should give some more negative camber, and to stiffen the suspension especially needed in turns. Any comments/experience with these changes would be appreciated.
You won't have a problem in the rear with those tires but the front might be cutting it too close. A 245 street tire barely clears the strut and fender and they typically run narrower than R-Comps or Slicks. Do the fronts clear the fender now because there is 4 inches of clearence between the tire and fender? Or do you think they fit inside the wheel well.
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Old Nov 28, 2005 | 06:10 PM
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Zepplin: The 245/35-18 Hoosier tires on the 18x8.5 wheels (stock rear size) fit well on the front now. No rubbing at all under track conditions. The question I have is whether there would be enough room if Renntech springs were installed.
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Old Nov 28, 2005 | 08:01 PM
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Originally Posted by dsC32
Zepplin: The 245/35-18 Hoosier tires on the 18x8.5 wheels (stock rear size) fit well on the front now. No rubbing at all under track conditions. The question I have is whether there would be enough room if Renntech springs were installed.
The Hoosier must be as narrow as a street 245 then. Bottom line is that if they fit now and go up inside the fender under compression then I see no reason why they won't fit with Renntech springs installed. The compressed distance of the suspension will not change due too the bumpstop remaining the same.

I run a Toyo T1-R 245/40/17 on the front of mine with the H&R springs which are identical in height to the Renntechs in the front. The tire just barely clears the strut and barely clears the fender - but no rubbing.

I have also seen someone run a tire a little too wide in the front and it looked like it cleared but one day on a particular turn it rubbed the fender and puckered it out requiring expensive bodywork to repair.
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Old Nov 28, 2005 | 09:07 PM
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Originally Posted by Zeppelin
The Hoosier must be as narrow as a street 245 then. Bottom line is that if they fit now and go up inside the fender under compression then I see no reason why they won't fit with Renntech springs installed. The compressed distance of the suspension will not change due too the bumpstop remaining the same.

I run a Toyo T1-R 245/40/17 on the front of mine with the H&R springs which are identical in height to the Renntechs in the front. The tire just barely clears the strut and barely clears the fender - but no rubbing.

I have also seen someone run a tire a little too wide in the front and it looked like it cleared but one day on a particular turn it rubbed the fender and puckered it out requiring expensive bodywork to repair.
or you could just let the fender flake away.
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