Stock, progressive or sport springs for my 5.0 W111 Coupe? - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 02-13-2010, 07:33 AM Thread Starter
GGR
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Stock, progressive or sport springs for my 5.0 W111 Coupe?

Once my 5.0 engine + 5 speed manual gearbox drivetrain and LSD 3.27 rear axle are ready for install, this will be the time to upgrade my suspension as every thing will be out of the car by then.

Coxracing and SL Market are offering progressive and sport springs:

Mercedes Front End Parts

Sport Springs for Mercedes-Benz SL and Sedans

This car will essentially be a driver, so it should retain enough comfort on long distance trips. But I also want to occasionally get the best of my additional horsepower on track days. So, I’m looking for the best compromise. I was told sport springs may be a bit too harsh on long distance trips. Progressive springs look quite appealing to me as I’m told comfort is retained in normal use but sprigs get stiffer when needed. Or should I just keep my stock springs and fit stiffer shocks?

Thanks in advance for sharing opinions and experience!
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post #2 of 6 (permalink) Old 02-13-2010, 10:33 AM
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Originally Posted by GGR View Post
retain enough comfort on long distance trips. But I also want to occasionally get the best of my additional horsepower on track days. So, I’m looking for the best compromise.
Youre asking for two totally different things.
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post #3 of 6 (permalink) Old 02-13-2010, 04:36 PM
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Wow on that drive train. Where can I read more about what you've done??
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post #4 of 6 (permalink) Old 02-13-2010, 04:55 PM Thread Starter
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Well, it's a bit scattered all over the place. A good deal of it is in the "Budget EFI" thread in the W126 forum. Some also here: http://www.benzworld.org/forums/w126...ml#post3938768

since then I took the trans out and am in the middle of transforming into a 5 speed.

Last edited by GGR; 02-13-2010 at 10:39 PM.
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post #5 of 6 (permalink) Old 02-15-2010, 01:36 PM
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Hi, as you know I am looking for the same thinks for my 3.5 5-speed coupe but I decided for the moment to stay with the original 3.5 springs, lower them like AMG did (if I remember wright 1/2 circle in front and 3/4 in rear so it would come down 2.5 cm).
I ordered the SPAX adjustable shocks and with the PU-Buschings and a 5mm shortened tube at the front roll-bar we will se. I will try the 20mm spacers and shorter front spring-blade from the 6.3, as you told me there could be some problems with the clearance of the steering-box , we will see... As you know a took the brake-moment system from the airsuspenzion and the swaybar at the rear for better the brake effeciency and to get relaxed braking in front of the turns. If that is not enough I will go for the progressive ones. You've 3.5 springs or 220 for the car?

Best Pagodino
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post #6 of 6 (permalink) Old 02-18-2010, 05:21 PM
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Originally Posted by GGR View Post
Well, it's a bit scattered all over the place. A good deal of it is in the "Budget EFI" thread in the W126 forum. Some also here: http://www.benzworld.org/forums/w126...ml#post3938768

since then I took the trans out and am in the middle of transforming into a 5 speed.
Wow thanks. Fascinating material!
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