FS: H&R super sport springs
03-27-2013, 03:00 AM
#1
Member
Thread Starter
Join Date: Jul 2012
Location: Orange County, CA, USA
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
2012 C250 Coupe 040 black
FS: H&R super sport springs
03-27-2013, 12:55 PM
#4
Member
Thread Starter
Join Date: Jul 2012
Location: Orange County, CA, USA
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
2012 C250 Coupe 040 black
Upgraded to H&R coilovers, Pics coming soon after I get tires. These are great! Pretty low too, but not low enough for me. Let me know if you have any questions.
03-27-2013, 05:00 PM
#7
MBWorld Fanatic!
Join Date: Sep 2008
Location: Delaware
Posts: 1,331
Likes: 0
Received 9 Likes
on
8 Posts
2004 Mazda6, 1993 RX7
They look like they don't have a lot of miles on them.
It could be a shadow, but it looks like the rear springs, where the elastic tubing covers them, made contact with each other, even where the coil gap is wide.
Contact is normal with these springs, but at the widely spaced coils ..... did you deliver a piano with them on?
.
It could be a shadow, but it looks like the rear springs, where the elastic tubing covers them, made contact with each other, even where the coil gap is wide.
Contact is normal with these springs, but at the widely spaced coils ..... did you deliver a piano with them on?
.
Trending Topics
03-27-2013, 05:25 PM
#8
Member
Thread Starter
Join Date: Jul 2012
Location: Orange County, CA, USA
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
2012 C250 Coupe 040 black
lol no, has about 15k miles, these are progressive designed springs, see how the middle part is more close to each other than the other, yeah the middle coil springs should be in contact over bump/heavy load. Learned from design stress analysis class 
you can call H&R for more info.
you can call H&R for more info.
03-27-2013, 11:59 PM
#9
MBWorld Fanatic!
Join Date: Sep 2008
Location: Delaware
Posts: 1,331
Likes: 0
Received 9 Likes
on
8 Posts
2004 Mazda6, 1993 RX7
Actually, these are dual rate springs, although they are often called progressive. An example of a truely progressive spring would be the same coil radius and wire dia, but with the space between coils getting greater in a linear fashion. That way it would progressively go into coil bind, and in the process increase in rate in a very linear, ie progressive way.
You are correct in that for the rear spring, the middle coils are largest in radius, and thus would represent the softest incremental rate. The fact that they are very close together means they are expected to go into coil bind with a heavy load, and switch to the stff zone of the spring with less active coils.
Signs of contact between the closely spaced coils is to be expected as you transition to the stiff zone. But on the rear, one of the widely spaced coils appeared to have had contact when I first looked at it, but with closer inspection it did not make contact.
Compared to other dual rate springs, the H&R SS has little travel in the soft zone. In fact, jimmythegreek's shop installed many sets of them, and most were in the stiff zone as the car sat. Bottom line is they give you a lot of drop, and a stiff rate.
.
You are correct in that for the rear spring, the middle coils are largest in radius, and thus would represent the softest incremental rate. The fact that they are very close together means they are expected to go into coil bind with a heavy load, and switch to the stff zone of the spring with less active coils.
Signs of contact between the closely spaced coils is to be expected as you transition to the stiff zone. But on the rear, one of the widely spaced coils appeared to have had contact when I first looked at it, but with closer inspection it did not make contact.
Compared to other dual rate springs, the H&R SS has little travel in the soft zone. In fact, jimmythegreek's shop installed many sets of them, and most were in the stiff zone as the car sat. Bottom line is they give you a lot of drop, and a stiff rate.
.
Last edited by kevink2; 03-28-2013 at 12:07 AM.
03-28-2013, 01:58 PM
#11
MBWorld Fanatic!
Join Date: Sep 2008
Location: Delaware
Posts: 1,331
Likes: 0
Received 9 Likes
on
8 Posts
2004 Mazda6, 1993 RX7
I was a guest lecturer in a Machine Design class at U-Delaware. Subject was about the classic case of a preloaded bolt holding down a part, in compression, and related graphs of force in the part vs force in the bolt as a tensile force is applyed to the bolt head. My subject was actual cases I dealt with when these relations don't apply.
another bump
another bump
