[Fot] WG: Paging Tom Krieger re: rear springs

[Kramer, Robert]

So it looks like the ticket is to buy the AFCO 8" 700 lb coil over springs and
use a couple of 1/2" spacers to get my 9 " free length back. Then, if that is
not enough rear spring, to go to the 10" 700 lb springs and cut them to fit
(once I do the math), holding out the even stiffer option of using 12" springs
if I need an even stiffer solution.



Bob Kramer
Sales Manager
RDO Equipment Company
16415 N. IH 35
Pflugerville, TX 78660
512-272-4141

-----Original Message-----
From: MadMarx [mailto:tr4racing at googlemail.com]
Sent: Thursday, March 25, 2010 11:19 AM
To: 'Bill Babcock'; Kramer, Robert
Cc: 'Friends'
Subject: AW: [Fot] WG: Paging Tom Krieger re: rear springs

The windings does infect the spring rate.

The formula is:

    D = (G * dD^4) / (8 *dF^3 *n) [N/mm]

    dD = wire diameter [mm]
    dF = Spring diameter at wire center [mm]
    n = number of windings
    G = Modul [N/mm2] (for Springsteel 79500 N/mm2)

-----Urspr|ngliche Nachricht-----
Von: Bill Babcock [mailto:billb at bnj.com]
Gesendet: Donnerstag, 25. Mdrz 2010 17:00
An: Kramer, Robert
Cc: MadMarx; 'Friends'
Betreff: Re: [Fot] WG: Paging Tom Krieger re: rear springs

spring rate doesn't change when you shorten a spring unless it's
progressively wound.

On Mar 25, 2010, at 5:35 AM, Kramer, Robert wrote:

> Is there a formula to determine spring rates when you shorten a spring?
The
> Afco 2 5/8" springs that Greg Blake has pointed out come in 8, 10, 12 and
14
> inch free lengths. I want a 9" free length spring to keep my ride height.
If I
> buy a 700 lb 10" spring and cut off an inch I would guess at a rate
somewhere
> around 800 lb rate.
>
> Bob Kramer
> Sales Manager
> RDO Equipment Company
> 16415 N. IH 35
> Pflugerville, TX 78660
> 512-272-4141
>
> -----Original Message-----
> From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
Behalf
> Of MadMarx
> Sent: Thursday, March 25, 2010 9:46 AM
> To: 'Friends'
> Subject: [Fot] WG: Paging Tom Krieger re: rear springs
>
> _______________________________________________
> fot at autox.team.net
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe: http://autox.team.net/mailman/options/fot/billb@bnj.com