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Old 02-22-2004, 03:31 PM   #1
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Default Shorter Front Springs ..... Why ??

Hi guys - Just have a simple question regarding shock spring lenght.

Why do some manufacturers like to use shorter springs in front and longer springs in the rear ie - R40 , V-One-RR/Evo and others use same length springs all round ie NTC3

What benefit would there be to handling or performance ? Ie if I replace the shorter front springs with longer springs that have the same SPRING RATE (lets say 28 lbs/inch) - what difference would it make ?

Thanks !
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Old 02-22-2004, 09:42 PM   #2
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Default Shorter Front Springs ..... Why ??

RCSavant;

With a longer spring and the availible mounting positions on the Car, it may not be possible to have a reasonable ride height (4 to 6mm). Otherwise it does seem to complicate spring selection.
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Old 02-23-2004, 12:16 AM   #3
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Lets say we have two springs and both are rated at 10 lbs/inch. One is 20mm and the other shorter at 17mm.

I have been told that the shorter spring will respond faster eventhough both springs have the same rate. Thanks for the help xman ! I would appreciate if anyone could give anymore input on this ! Thanks.

Also popsracer , I figured that the shorter spring might have been used to shorten the shock so a reasonable ride height can be achieved at the frond end. And yes it is very annoying having different length shock springs - for me at least !! I am able to get the same ride height/droop/ etc settings comfortably with the longer springs on the front shocks - but since so many manufacturers use a shorter spring in front I would just like to know if there is some other significant reason to do so.

Thanks for all the help !
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Old 02-23-2004, 03:42 AM   #4
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On most race cars the front and rear springs have the same spring rate. The only difference is the number of coils which also happens to be length as well. The fewer number of active coils on a spring the higher the spring rate. So, because there are less coils on the front springs, they are harder than the rears.
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Old 02-23-2004, 06:32 AM   #5
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Quote:
Originally posted by RCSavant
Lets say we have two springs and both are rated at 10 lbs/inch. One is 20mm and the other shorter at 17mm.

I have been told that the shorter spring will respond faster eventhough both springs have the same rate. Thanks for the help xman ! I would appreciate if anyone could give anymore input on this ! Thanks.

<SNIP>
If the two springs you mention are the same rate they will react exactly the same.
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Old 02-23-2004, 06:46 AM   #6
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Quote:
Originally posted by Racing4Evo
On most race cars the front and rear springs have the same spring rate. The only difference is the number of coils which also happens to be length as well. The fewer number of active coils on a spring the higher the spring rate. So, because there are less coils on the front springs, they are harder than the rears.
Well, sort of . . . .

The variables that influence spring rate are:
Wire thickness.
Outside diameter of spring.
Number of active coils.

This springs thing was discussed recently, HERE
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