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Old 08-06-2009, 07:49 AM   #1
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Default Shock springs

How does the performance differ from standard springs to a progressive spring?

For example, for my tc3, ae blue and silver would be recommended for my track. The blue spring is 17 lbs and silver is 14.4 lbs.

HPI offers 16.9 lbs springs which would be yellow and blue which is 14.8 lbs. Those two are standard springs.

The progressive spring set that would work in my range would be white, which is 16.7 lbs.
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Old 08-06-2009, 07:57 AM   #2
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How does the performance differ from standard springs to a progressive spring?
this should sum it up, especially if you follow the link within the link.
http://www.rctech.net/forum/6165314-post9.html
and as a direct answer the above question (which may now be moot):
http://www.tuninglinx.com/html/suspension-springs.html
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Old 08-06-2009, 08:20 AM   #3
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How does the performance differ from standard springs to a progressive spring?

For example, for my tc3, ae blue and silver would be recommended for my track. The blue spring is 17 lbs and silver is 14.4 lbs.

HPI offers 16.9 lbs springs which would be yellow and blue which is 14.8 lbs. Those two are standard springs.

The progressive spring set that would work in my range would be white, which is 16.7 lbs.
HPI's progressive springs are from WAY back in time... not what people are using in current setups, and since they are pretty long also you may not be able to fit them on your car.

They do work as a progressive spring because the pitch (the gap between the coils) gets smaller, this means that under compression a few coils become coilbound, making the spring feel gradually stiffer.

Having never run a progressive spring on a RC car I couldn't really comment on the actual handling effect, although I'll surmise that since none of the hot setups use them anymore, they are not worth the trouble. RC cars seem to work best with simple shocks and springs. All the variable damping and springing technologies seem to have fallen out of favour quite quickly.
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Old 08-06-2009, 08:58 AM   #4
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They do work as a progressive spring because the pitch (the gap between the coils) gets smaller, this means that under compression a few coils become coilbound, making the spring feel gradually stiffer.
the few i tested are dual rate (nothing gradual about it), and they didn't get to the second rate until around 6mm compression, likely making the second rate unreachable when used on the car.

so, in reality, all anyone was doing when they ran those were using the first linear section which was presumably way softer than what they were comparing to. hence the laziness, which was the popular comment on them. (this also matches up with what a true progressive spring should feel like given the same end point in body roll, and is probably accountable for why so many people thought these were truly progressive).
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Old 08-06-2009, 09:49 AM   #5
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silver and blue. we run them at trackside. feel free to change them once you feel you car is missing something.
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Old 08-06-2009, 12:51 PM   #6
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We run nothing but blue/silver on TC3's and TC4's at our asphalt track also. You can't go wrong!
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Old 08-06-2009, 12:54 PM   #7
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We run nothing but blue/silver on TC3's and TC4's at our asphalt track also. You can't go wrong!
but at some tracks you just need progressive springs...
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