rheckz Posted April 2, 2013 Share Posted April 2, 2013 I have just received the Eibach progresive rate lowering springs for my 1978 280z, MSA has them on sale for $189 The front stock spring is 15.5 inches tall the Eibach is 10.5 but they only lower the car 1 to 1.5 inches I am instlling this week will let you know how stiff they are. Quote Link to comment Share on other sites More sharing options...
rheckz Posted June 5, 2013 Author Share Posted June 5, 2013 OK Its done Springs Installed with kyb struts, Car is 1978 280z with sbc with jtr mounts which I installed 15 years ago. The suspension in the car was original springs with 15 year old gas struts with 15 inch zx rims and 205 60 tires Stock sway bar in front no sway bar in back After Installation of the Eibach springs the car sits 3/4 inch lower front and back (eibach says 1 to 1 1/4 ) Ride quality is much better, stiff but you still have movement. For $189 for springs and $200 for shocks total its a deal. Rear installation only required half shafts,e brake cable and brake line never touched the a arms Quote Link to comment Share on other sites More sharing options...
daddydonuts Posted June 6, 2013 Share Posted June 6, 2013 I read that KYB struts (excel g) would not work with lowered springs. I am real interested in knowing if you have any issues. Quote Link to comment Share on other sites More sharing options...
rheckz Posted June 6, 2013 Author Share Posted June 6, 2013 I have driven the car and do not seam to have any issues. I purchaced from MSA and was not told that the KYB would not work. They seam fine ,what sort of issues do they say the KYB would have with lowering springs, The eibachs lowered less than an inch so maybe they are reffering to coilovers where there is more of a drop in height. Quote Link to comment Share on other sites More sharing options...
daddydonuts Posted June 6, 2013 Share Posted June 6, 2013 http://www.thezstore.com/page/TZS/CTGY/PSDC02A Quote Link to comment Share on other sites More sharing options...
johnc Posted June 6, 2013 Share Posted June 6, 2013 The issue is bump stops. You must install new urethane bumps stops at full length with the KYBs. If the shock bottoms it hits the internal foot valve and destroys the shock. Quote Link to comment Share on other sites More sharing options...
daddydonuts Posted June 7, 2013 Share Posted June 7, 2013 The issue is bump stops. You must install new urethane bumps stops at full length with the KYBs. If the shock bottoms it hits the internal foot valve and destroys the shock. I have urethane bump stops for my upcoming install, thanks for the help. Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted June 7, 2013 Share Posted June 7, 2013 I'm running kyb excel g's on my s13 with tein lowering springs, and new the bumpstops that came with the shocks. I've put 20k miles on them and they are still fine. Everyone says that if you run that combo it will blow out asap. Well they are wrong. Then again I use my240sx as a grocery getter and I don't really ever mess around with it. Quote Link to comment Share on other sites More sharing options...
johnc Posted June 7, 2013 Share Posted June 7, 2013 The KYB foot valve issue is specific to the S30 application. It also occurs with Tokicos. Both shocks use an older design. Quote Link to comment Share on other sites More sharing options...
rheckz Posted June 7, 2013 Author Share Posted June 7, 2013 I do not drive the car that hard. I will wait and see how long it takes for them to fail. Quote Link to comment Share on other sites More sharing options...
daddydonuts Posted June 7, 2013 Share Posted June 7, 2013 So to clarify: If I use KYB excel-g struts with eibach or tokico springs (which lower the ride height) and use a eurathane bump stop, I should have no issues with damaging the struts? I will not be racing my car on a track or drag strip. 1973 240ZT Quote Link to comment Share on other sites More sharing options...
daddydonuts Posted June 7, 2013 Share Posted June 7, 2013 Sorry to hijack your thread Quote Link to comment Share on other sites More sharing options...
rheckz Posted June 7, 2013 Author Share Posted June 7, 2013 After thinking about this and looking at the strut i am a little confused on how the inner shock piston could ever reach the bottom of the the shock tube. With the spring fully compressed it looks as though the shock piston would be held inches higher than the bottom of the tube. I can understand with coilovers when you lower the spring perch. Is there anyone who has had this problem using the stock spring perch and the eibach springs ?? Quote Link to comment Share on other sites More sharing options...
Dutchiez Posted August 26, 2013 Share Posted August 26, 2013 I am going to install the same springs in the fall in my 280z along with the illumina shocks and bump stops, bump steer spacers, urethane bushings etc. Did the springs settle anymore? 3/4 seems like the kind of drop you get just after you take the car off the jacks before they settle. I had H&R springs on my probe GT and they took a good week or so to settle in. I've heard everything from 3/4" to 2" for these springs. I guess I will find out soon. Post before and after pics if you can. Quote Link to comment Share on other sites More sharing options...
spiff Posted August 26, 2013 Share Posted August 26, 2013 (edited) I bought the same springs from MSA, ride quality is really good compared to other manufacturers. But I am however slightly dissapointed at the drop, but they say 280Z's are higher than other S30's stock? I don't have anything to compare with since my old springs where chopped when I bought the car and hence the reason I bought lowering springs... I do have a picture of it right after I installed them, they have settled a little bit more but not much. https://lh6.googleusercontent.com/-8z-pDwh1AgA/UctbfAVxnFI/AAAAAAAAAk0/HWJ5rqgmdxA/w976-h549-no/DSC_0136.jpg Edited August 26, 2013 by spiff Quote Link to comment Share on other sites More sharing options...
Dutchiez Posted August 28, 2013 Share Posted August 28, 2013 Thanks for posting spiff. That looks a lot better than stock, but i see what you mean. It looks like you got about a 1" drop. At least compared to how my car sits now. My 76 280z looks like a monster truck. I am hoping to hide another 1/2-3/4" with the flares I put on and run the illuminas on a stiff setting. I dont track my car, just building it to be a nice looking, driving and sounding z. Quote Link to comment Share on other sites More sharing options...
rheckz Posted August 29, 2013 Author Share Posted August 29, 2013 I have driven the car for a hundred miles and she sits about 1 inch lower then before. I have owned this car for 30 years and it always seemed raised a bit even after installing a V-8 The big difference though is the how stiff the new springs are The old springs had way to much give and would allow the body to move a bit on hard acceleration and cornering I am satisfied with the result as I do not want to go much lower or i will not be able to go over the speed bumps in my neighborhood It just clears with this setup Quote Link to comment Share on other sites More sharing options...
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