LegendsRacer - Legends & Bandolero Racing Forum

LEGENDS => Setup and Handling => Topic started by: amp racing on January 27, 2015, 01:54:53 pm

Title: 10' spring to 8" spring question..
Post by: amp racing on January 27, 2015, 01:54:53 pm
I know some of you might have tried this.... if you take a 10 inch spring and cut it to make a 8 inch spring.. compressed 1 inch will it have the same rating? ie 200 lbs spring 10 inches long compressed 1 inch should be 200 lbs. if  I take and cut that spring to 8 inches and compress it 1 inch will it still be a 200 lbs spring..?

joe
Title: Re: 10' spring to 8" spring question..
Post by: VMS Motorsports on January 27, 2015, 02:49:10 pm
No.
Here is a great article addressing why:
http://www.eatondetroitspring.com/cuttingcoilspringscalculations/
Title: Re: 10' spring to 8" spring question..
Post by: Gimpster on January 27, 2015, 03:59:15 pm
 Pretty much so... Springs are measured for their rating at 1 inch
If you compress a 10 inch spring one inch, each individual coil moves a given distance to let the entire length of the spring travel the 1 inch compressed
If you cut off 2 inches and compress the 8 inch spring one inch, the individual coils will move farther to allow the coil to be compressed an inch like the 10 inch spring was compressed
The reading of the 8 inch spring would be near what the 10 inch spring would be rated at around 2 inches of compression instead of one inch (not exact but close as an example)

~Gimp~
Title: Re: 10' spring to 8" spring question..
Post by: knoxracing on January 27, 2015, 04:15:48 pm
Have any of you guys actually done this? Cut a ten to eight then what? Now you have a jacked up ten inch spring that wont seat properly , what the purpose/ I am missing something I think.
Title: Re: 10' spring to 8" spring question..
Post by: justfreaky on January 27, 2015, 04:28:38 pm
Dennis,

My only thought is trying to save some money by cutting the 10" spring down to an 8" spring.
If so; Then Joe would be better off to sell his 10" springs and buy or trade for 8" springs.


Steve
Title: Re: 10' spring to 8" spring question..
Post by: amp racing on January 27, 2015, 04:54:31 pm
thinking that the cut spring would give you less travel in the corner like using a light spring cranked up.

joe
Title: Re: 10' spring to 8" spring question..
Post by: justfreaky on January 27, 2015, 05:04:07 pm
Joe,

Why not get a 10" spring of desired rate (higher)? Then you would get less travel. However, you would lose the roll momentum that a softer spring provides.

Steve
Title: Re: 10' spring to 8" spring question..
Post by: Gimpster on January 27, 2015, 05:33:36 pm
..limiting travel ? I am out of this conversation. The end result just doesn't work. Takes away the chassis reaction. Kind of like racing a red radio flyer wagon

~Gimpster~