Subject	I'm sure the spring rates are what you think they are
Posted by	LitlElvis on July 13, 2010 at 6:55 AM
	This message has been viewed 55 times.
In Reply To	Is there any way I can verify the spring rate without being posted by Wright (Ca) on July 12, 2010 at 11:43 PM
Message	especially if they're marked. You can calculate spring rate for a steel spring from the following formula: R = (11500000 x d^4)/(8 x D^3 x Na) Where: R = rate d = wire diameter (inches) D = mean diameter of spring (OD - wire) Na= number of active coils (count the total and subtract 2) If you decide to get lighter rate springs, you will need to get longer springs with more travel. Ultimately you need to ensure that the total load capacity of the new spring (rate x travel) is higher than that of the stock springs (see my graph for that number front and rear).
Follow Ups	Is it possible to have coil overs that ride as comfortably - Wright (Ca) 17:53:59 07/12/10 It does feel bouncy to me still but I think that it has - 300NASeattle 18:33:49 07/12/10 Is there no rebound adjustment? - Evan(CA) 18:36:20 07/12/10 Oh, Great, - Zjustignoreme 18:44:39 07/12/10 No, you took this wrong. I suspect that I either am - Wright (Ca) 19:53:22 07/12/10 so why did you buy them if you had no clue how it was going - LJZTT 19:54:33 07/12/10 Price and reputation - Zjustignoreme 10:58:34 07/13/10 Oh come on, it's a Z, not a buick. - Shiers69 18:47:32 07/12/10 they ride pretty smooth for me - iceman601 19:08:37 07/12/10 Nice plate :) Thanks for your input. (n/m) - Wright (Ca) 19:54:16 07/12/10 I have Powertrix SS and love them - DracoZ 19:24:19 07/12/10 Ditto (n/m) - inski 19:39:32 07/12/10 Spring rate? (n/m) - Wright (Ca) 19:44:13 07/12/10 If you're unhappy I'll be glad to trade you, straight up ;-) (n/m) - Under_Powered 19:45:20 07/12/10 Why do you have them set on 10? - ConVerTT 19:46:41 07/12/10 I've tried them at 1, 15 and everything in between. - Wright (Ca) 19:49:01 07/12/10 softest 2, 3 settings for street, everything else for track (n/m) - LJZTT 19:53:07 07/12/10 Yes, I have the 5 / 7s. - ConVerTT 20:11:46 07/12/10 I will remove all preload and try again. Thanks alot. I am - Wright (Ca) 20:17:22 07/12/10 Sure. I would like to see it. (n/m) - ConVerTT 20:19:54 07/12/10 I seriously doubt it - LJZTT 19:51:26 07/12/10 Thanks LJ, I also suspect that these just aren't the - Wright (Ca) 20:03:11 07/12/10 I still think they are fine for street use, well the SPL's - LJZTT 11:05:03 07/13/10 Excellent points. Wright (ca) - as LJ highlights my - ConVerTT 20:19:01 07/12/10 I have a DD as well but would like to drive the z once in - Wright (Ca) 20:27:29 07/12/10 Hmmm - sounds like something is messed up but it - ConVerTT 20:49:47 07/12/10 Agreed. a shock with ( for example) 2 " of travel can't.. - tognot 20:30:35 07/12/10 a properly adjusted coilover will not bottom out (n/m) - aliaZ 20:45:09 07/12/10 The total shock travel doesn't 100% define the ride quality - LitlElvis 20:56:06 07/12/10 Is there any way I can verify the spring rate without being - Wright (Ca) 23:43:58 07/12/10 Re: Is there any way I can verify the spring rate ? yes.. - tognot 00:12:46 07/13/10 I'm sure the spring rates are what you think they are - LitlElvis 06:55:46 07/13/10 yes, thanks I didnt mean to come across that range of motion - LJZTT 09:39:36 07/13/10 I have to agree, living in the city with them really sucks - BigTDogg (MA) 20:46:09 07/12/10 Big 2nd.. (n/m) - ttz'in (NorCal) 22:48:24 07/12/10 Agree, and infrastructure ain't getting better Evan.. - ttz'in (NorCal) 22:34:25 07/12/10 Video for your oppinion. - Wright (Ca) 20:34:05 07/12/10 Looks like you're ready at any moment to Tokyo Drift - Under_Powered 20:43:33 07/12/10 In case a bunny runs accross the road. Haha, but - Wright (Ca) 20:46:47 07/12/10 Damn I wanted to hear the Genie..... - Evan(CA) 20:45:47 07/12/10 Just for you. - Wright (Ca) 20:53:29 07/12/10 I'm wondering what you mean by bouncyness now - Ashman2k2 20:46:44 07/12/10 Is that your CEL or your seatbelt light that's on? - BigTDogg (MA) 20:48:50 07/12/10 Hicas light because I'm too lazy to take the cluster apart - Wright (Ca) 20:54:52 07/12/10 That'll help with the ride if they adjust the preload. - BigTDogg (MA) 21:43:46 07/12/10 If you disabled your HICAS, remove the 2nd plug on the PSECU (n/m) - ZiNnYc 21:51:16 07/12/10 Pretty rough! Mine is nothing like that. - ConVerTT 21:49:06 07/12/10 I have spent a great deal of time replacing - Wright (Ca) 23:38:49 07/12/10 I would try it. - ConVerTT 09:16:57 07/13/10 Evan,that right truck lane is BRUTAL! lol. - ttz'in (NorCal) 22:55:27 07/12/10 That's sad. It looks like the stock "Sport" setting - ZTicket(Dallas) 07:15:59 07/13/10 yep, looked like my eibachs w/oem shocks on sport (n/m) - LJZTT 10:42:21 07/13/10 IMO, that should be expected at the "10" setting - LJZTT 10:46:41 07/13/10 I've driven Z's with SPL, Powertrix UltraLights, Aragostas, - Ashman2k2 20:42:12 07/12/10 lol. NO. (n/m) - ZiNnYc 03:44:32 07/13/10 I have the ultralights also and imo - ztunerz 08:53:14 07/13/10 please define "bouncy"... - LitlElvis 21:05:13 07/12/10 Hey Brett, I guess I am using the term bounce incorrectly. - Wright (Ca) 21:18:35 07/12/10 That's why I chose my new spring rates cautiously - LitlElvis 07:01:49 07/13/10 . - ZiNnYc 21:42:14 07/12/10 Did you have these when i rode in your car ? - ztunerz 09:08:45 07/14/10 Yes, the Aragostas were installed. (n/m) - ZiNnYc 12:38:11 07/14/10 My Tein Coilovers are just as bad. I have gotten airborne - XTZ 22:22:37 07/12/10
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