Mayolives Posted May 20, 2017 Share Posted May 20, 2017 I have new Eiback springs and KYB struts for my 73 240Z. They didn't include bump stops. Do I need them? Quote Link to comment Share on other sites More sharing options...
grannyknot Posted May 20, 2017 Share Posted May 20, 2017 Yes you do, try and find the newer urethane foam bump stops, they are not as harsh as the straight urethane that you see everywhere. Koni makes good ones. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted May 22, 2017 Share Posted May 22, 2017 ^^^ This. The bump stops you see in the Energy Suspension bushing kit are crap. Quote Link to comment Share on other sites More sharing options...
adivin Posted October 4, 2020 Share Posted October 4, 2020 Are bump stops needed in the rear? I also have the Eibach springs but with the new Koni struts. Quote Link to comment Share on other sites More sharing options...
grannyknot Posted October 4, 2020 Share Posted October 4, 2020 2 hours ago, adivin said: Are bump stops needed in the rear? I also have the Eibach springs but with the new Koni struts. You really should. Sometimes the Eibach springs can make the rear a little lower than the front, they did on my car so I had to install 1/2" spacers on top of the springs to level out the car. Quote Link to comment Share on other sites More sharing options...
adivin Posted October 4, 2020 Share Posted October 4, 2020 11 minutes ago, grannyknot said: You really should. Sometimes the Eibach springs can make the rear a little lower than the front, they did on my car so I had to install 1/2" spacers on top of the springs to level out the car. I had the rear suspension ready to go in today, but forgot about bump stops...damn. Do you know exactly which Koni bump stops to get and a good source to purchase? Quote Link to comment Share on other sites More sharing options...
jhm Posted October 5, 2020 Share Posted October 5, 2020 Here you go. You may be able to find them cheaper elsewhere, but Fat Cat can help you select the best size and composition for your specific application. http://www.fatcatmotorsports.com/FCM_bump_stops.htm Quote Link to comment Share on other sites More sharing options...
Whitley_280z_2+2 Posted October 5, 2020 Share Posted October 5, 2020 On 5/21/2017 at 9:59 PM, JMortensen said: ^^^ This. The bump stops you see in the Energy Suspension bushing kit are crap. Are they really? I have them in a 280Z but I don't think I've ever had the suspension compress enough to hit them. Just curios, what do you have to do to hit a bump stop on one of these cars? I've got Eibach lowering springs but its been a very smooth ride. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted October 5, 2020 Share Posted October 5, 2020 Yes, they really are. What do you have to do? Lower the car I guess. I used to hit them quite a bit. CA roads didn't help. Now I have sectioned struts and 600 in/lb springs, so not an issue anymore. Quote Link to comment Share on other sites More sharing options...
grannyknot Posted October 5, 2020 Share Posted October 5, 2020 20 hours ago, Whitley_280z_2+2 said: Just curios, what do you have to do to hit a bump stop on one of these cars? Take some air. Quote Link to comment Share on other sites More sharing options...
Whitley_280z_2+2 Posted October 5, 2020 Share Posted October 5, 2020 1 hour ago, grannyknot said: Take some air. I’ll try! I would love to hit a real track. The goal would be to take a jump, hit the bump stops, and crack the oil pan Quote Link to comment Share on other sites More sharing options...
jhm Posted October 5, 2020 Share Posted October 5, 2020 22 hours ago, Whitley_280z_2+2 said: Are they really? I have them in a 280Z but I don't think I've ever had the suspension compress enough to hit them. Just curios, what do you have to do to hit a bump stop on one of these cars? I've got Eibach lowering springs but its been a very smooth ride. Just curious....how do you know that you've never hit the bump stops? Have you checked your suspension compression to verify? The reason that PU bump stops are not recommended is that they are exponentially higher in effective spring rate than any spring you'd run on the car. I think the Eibachs are only 180'ish lb/in, so it wouldn't take much to push the suspension through its full range of motion. What shocks are you running with the Eibachs? Quote Link to comment Share on other sites More sharing options...
Whitley_280z_2+2 Posted October 6, 2020 Share Posted October 6, 2020 I haven’t actually measured anything aside from jacking up the control arm and making sure the strut didn’t hit the stops right away. I just say that because I’ve never felt any harsh change in the suspension movement. The roads around me in NC are pretty good thankfully. I’ve got KYB shocks and I think that 2+2 Eibachs are actually a little stronger. 1 Quote Link to comment Share on other sites More sharing options...
cruceno21 Posted January 31, 2021 Share Posted January 31, 2021 I posted a thread, but fishing for some feedback before I buy. I have a 280z and looking at the Eibachs with KYBs but MSA doesn't recommend them. Looking at what you might be running Whitley and how you like them (assuming you have the commonly available Eibach/KYBs out there). My thread is top if you want to see that. My thread for more info: Quote Link to comment Share on other sites More sharing options...
JMortensen Posted January 31, 2021 Share Posted January 31, 2021 Don't post in the FAQ section. Nobody can reply. KYBs are comfort shocks. Konis are better for your uses. Quote Link to comment Share on other sites More sharing options...
jhm Posted January 31, 2021 Share Posted January 31, 2021 42 minutes ago, cruceno21 said: I posted a thread, but fishing for some feedback before I buy. I have a 280z and looking at the Eibachs with KYBs but MSA doesn't recommend them. Looking at what you might be running Whitley and how you like them (assuming you have the commonly available Eibach/KYBs out there). My thread is top if you want to see that. If you haven't already done so, I would read all the threads from people complaining about uneven (or unsatisfactory) ride height results after installing the Eibachs. Also, be mindful of the fact that the Eibachs are a progressive spring. Lots of folks (myself included) are not big fans of any progressive-rate spring. In addition to the Konis, as suggested by @JMortensen, you may want to consider Bilsteins as well. Old part number: P30-0032; new P.N. 34-184530. Quote Link to comment Share on other sites More sharing options...
cruceno21 Posted January 31, 2021 Share Posted January 31, 2021 4 hours ago, JMortensen said: Don't post in the FAQ section. Nobody can reply. KYBs are comfort shocks. Konis are better for your uses. I didn't realize I posted in the wrong spot. How do I fix that? Or delete the post and put it elsewhere? If I go back to the page to make a new post it shows the same as I did before, so not sure how I made it an FAQ. Quote Link to comment Share on other sites More sharing options...
NewZed Posted January 31, 2021 Share Posted January 31, 2021 It's a common problem. Apparently, difficult to fix, it's been reported many times over the years but nothing happens. Just copy all of the words in the other post and create a new thread. Quote Link to comment Share on other sites More sharing options...
jhm Posted January 31, 2021 Share Posted January 31, 2021 35 minutes ago, cruceno21 said: I didn't realize I posted in the wrong spot. How do I fix that? Or delete the post and put it elsewhere? If I go back to the page to make a new post it shows the same as I did before, so not sure how I made it an FAQ. You posted your original question in the "FAQs" section. I don't know if you (i.e. the author) can delete that post; but if not, an Admin will need to do so. If you want to have a normal discussion thread, just repost your original post in this sub-forum. If you're looking at HybridZ on your phone, the forum structure may not be obvious as to the different sub-forums....but it's immediately apparent if you check it out on your laptop or PC. Quote Link to comment Share on other sites More sharing options...
cruceno21 Posted February 1, 2021 Share Posted February 1, 2021 Posted a new one, think people can reply on there now, also wondering on other spring ideas besides the Eibachs, but haven't found much else. Quote Link to comment Share on other sites More sharing options...
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