Easy test to find out if they're the same rate... sit them side by side and measure how long they are (free length)
Stand on them one at a time and measure the donni-length with you on them (have someone do this so you dont break your head) if you're right, the deflection should be the same. Matt > Agreed. Point being i have 2 sets of FM springs from the same era and > ostensibly the same rates. That being the case, the longer one should > and DID produce an increase in ride height. > > On 8/25/08, Matt Yates <[EMAIL PROTECTED]> wrote: >> spring free length is not necessarily tied to ride height. >> >> example: a spring 10 inches long and 100 lb/in rate will compress 5 >> inches >> to support a 500 lb load. >> >> a spring 6 inches long with a 500 lb/in rate will compress 1 inch to >> support a 500 lb load. >> >> both will end up 5 inches long when loaded to 500 lbs. the difference >> is >> that when you put another 100 lbs on the longer spring, it will compress >> another inch while the shorter spring will only compress 1/5 of an inch. >> >> oh and if your tie rods aren't the same length, you may have more >> steering >> travel in one direction and less in the other? >> >> Matt >> >> >>> OK. I can see that. But it sounds as if this would always be the case >>> with >>> this configuration then. So with a shorter spring, why doesn't the >>> right >>> side rub? >>> >>> Not being combative, just trying to understand. >>> >>> On Mon, Aug 25, 2008 at 4:03 PM, Keith Tanner <[EMAIL PROTECTED]> >>> wrote: >>> >>>> FCM bumpstops will definitely contribute to the problem - they're >>>> intended to increase compression travel. What happens when you get too >>>> much >>>> compression travel up front? The tire rubs. Been there, done that. >>>> >>>> Keith Tanner >>>> Flyin' Miata >>>> [EMAIL PROTECTED] >>>> http://www.flyinmiata.com >>>> 1-800-FLY-MX5s (orders) >>>> 1-970-464-5600 (tech) >>>> 2008 FM Open House: August 14-17 >>>> >>>> >>>> ------------------------------ >>>> *From:* [EMAIL PROTECTED] [mailto: >>>> [EMAIL PROTECTED] *On Behalf Of *Donni >>>> *Sent:* Monday, August 25, 2008 1:34 PM >>>> *To:* [EMAIL PROTECTED] >>>> *Cc:* [email protected] >>>> *Subject:* Re: Test message (now suspension) >>>> >>>> His mounts with the old FM springs would just be scary! I can't >>>> imagine >>>> that bumpstop would be the issue though. I might call him anyhow. He >>>> doesn't >>>> respond to email from what I hear. >>>> >>>> On Mon, Aug 25, 2008 at 3:26 PM, <[EMAIL PROTECTED]> wrote: >>>> >>>>> Maybe contact fat cat and see if he's had this problem before with a >>>>> similar setup. >>>>> >>>>> >>>>> Ross >>>>> >>>>> *From:* Donni <[EMAIL PROTECTED]> >>>>> *Sent:* Monday, August 25, 2008 3:01 PM >>>>> *To:* [EMAIL PROTECTED] >>>>> *Cc:* [EMAIL PROTECTED] ; [email protected] >>>>> *Subject:* Re: Test message (now suspension) >>>>> >>>>> I SOOO hope it's a perch. You really think the FCM 46mm bumpstops >>>>> could >>>>> be >>>>> an issue? >>>>> >>>>> I'm pretty certain there's no tweakage. >>>>> >>>>> On Mon, Aug 25, 2008 at 2:58 PM, <[EMAIL PROTECTED]> wrote: >>>>> >>>>>> Here is a pic of me with 13x8 Keizers (the good ones made before >>>>>> 1994) >>>>>> w/ >>>>>> 5" BS on a Hoosier 225/45/13. >>>>>> >>>>>> http://members.aol.com/solomiata/DP57d.jpg >>>>>> >>>>>> Here is a pic with the same wheel (rear) with a 22" tall x 9.5" wide >>>>>> Formula Continential tire >>>>>> >>>>>> http://members.aol.com/FE3N/4-2002W.jpg >>>>>> >>>>>> Never had any rubbing problems. 200# rear springs (Racing Beat >>>>>> "race" >>>>>> fronts in rear position) with 1" bump stops. I agree with Keith >>>>>> that >>>>>> if the >>>>>> unibody/subframes are not tweaked it likely is a bump stop or upper >>>>>> perch. >>>>>> >>>>>> Randy >>>>>> ------------------------------ >>>>>> Get the MapQuest >>>>>> Toolbar<http://mapquest.com/toolbar?ncid=mpqmap00050000000010>. >>>>>> Directions, Traffic, Gas Prices & More! >>>>>> >>>>> >>>>> >>>> >>> _______________________________________________ >>> Miatapower mailing list >>> [email protected] >>> http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower >>> >> >> >> > _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
