Zfan1 Posted October 3, 2011 Share Posted October 3, 2011 I have a set of Arizona Z front springs on my 240Z. They ride like hell and hammer the crap out of me when I drive. Does anyone know what their front spring rates are? What spring rate would you all recommend for a 240Z that is mainly cruised and drag raced. I have QA1 coil overs in the rear, 10" springs with 250 lb rate. Quote Link to comment Share on other sites More sharing options...
Sideways Posted October 4, 2011 Share Posted October 4, 2011 If those azc springs are too much for you, youll hate those qa1 coilovers. The azc springs are 180 pounds up front and 200 out back. Of course its possible your issues are from poorly valved/blown shocks, or something else entirely. Quote Link to comment Share on other sites More sharing options...
johnc Posted October 4, 2011 Share Posted October 4, 2011 Ride harshness comes from: 1. Tire sidewall height, sidewall construction, and air pressure. 2. Shock compression damping. 3. Hard bushings. 4. Anti-roll bar end links. You problem is not the springs. Quote Link to comment Share on other sites More sharing options...
240zip Posted October 4, 2011 Share Posted October 4, 2011 I have the AZC linear rate springs, the ride is not harsh. I think they're great springs. I have energy suspension urethane bushings. The biggest (and I mean biggest) differences came from the tire sidewall height. I've had 65 mud and snow tires and and 50 series. I've seen folks with 45's. The 65's were like balloon and a bit 'bouncy'. The 205/50R-15 Dunlop Direzza Sport Z1 Star Spec I have now are great track tires. For street, I'd consider something a bit taller. The ride got more harsh when I dropped to the 50s. It was significant. I have the Tokico 5-way struts and don't notice much from changing the settings, but I keep it in the middle most of the time. My end links are urethane too. The steering coupler is one thing many people keep as rubber, but again, I went with urethane with no issues. Quote Link to comment Share on other sites More sharing options...
ktm Posted October 4, 2011 Share Posted October 4, 2011 While not Arizona Z Car springs, I am using the 280z Tokico springs on my 240z which have the same spring rate. The ride is definitely firm but not harsh. Harsh was the old 240z Tokico progressive springs which were coil bound. I kept thinking that my struts were going to blow out the strut towers at times. Are you running the QA1s now in the rear and the Arizona springs in the front? Have you considered that it is the rear spring that is the problem? You have 250 lb-in. springs in the rear coupled with 180 lb-in springs in the front. Quote Link to comment Share on other sites More sharing options...
240zip Posted October 4, 2011 Share Posted October 4, 2011 Are running the 245/45-17 BFG G-Force Sport radials that are shown in the picture of your 240Z ... if you are, then that's part of the issue. Quote Link to comment Share on other sites More sharing options...
Zfan1 Posted October 5, 2011 Author Share Posted October 5, 2011 Are running the 245/45-17 BFG G-Force Sport radials that are shown in the picture of your 240Z ... if you are, then that's part of the issue. Nope, I am running a 255/60-15 Mickey Thompson drag radial out back and a 215/60-15 tire up front. Struts in front are Tokico blue non adjustable. Quote Link to comment Share on other sites More sharing options...
Zfan1 Posted October 5, 2011 Author Share Posted October 5, 2011 Ride harshness comes from: 1. Tire sidewall height, sidewall construction, and air pressure. 2. Shock compression damping. 3. Hard bushings. 4. Anti-roll bar end links. You problem is not the springs. 10-4, tires are 215/60-15 up front with 32-33 psi All bushings have been replaced, maybe struts. I will have to check them out, I am pulling everything anyway as I need to get it to transfer better. Quote Link to comment Share on other sites More sharing options...
johnc Posted October 5, 2011 Share Posted October 5, 2011 One harshness issue is poly tc rod bushings. Going back to rubber will reduce a lot of felt impact harshness and cabin noise. Also, make sure you have a good set of bump stops. You can also lower your front tire presses to about 29, assuming a normal S30 weight. Quote Link to comment Share on other sites More sharing options...
Zfan1 Posted October 6, 2011 Author Share Posted October 6, 2011 One harness issue is poly tc rod bushings. Going back to rubber will reduce a lot of felt impact harshness and cabin noise. Also, make sure you have a good set of bump stops. You can also lower your front tire presses to about 29, assuming a normal S30 weight. Thanks for your input. Thanks Mike Quote Link to comment Share on other sites More sharing options...
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