04-15-2024, 09:19 AM | #1 |
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Nitron R3 - Spring Rate 700f / 750r ?
Hi,
I got a chance to purchase brand new unused Nitron R3 coilovers (divorced rear setup); interestingly it got a spring rate of 700f and 750r. Ive been reading a lot of post in the forum regarding spring rate -- and most of the conclusion seems to have a much bigger % difference in f/r spring rates (front being much lower) Hence Im just wondering whether any of you have tried this spring rate setup and how does the call feel and handle in both street and track (most importantly street)? In addition, this have been discussed a lot of time but I still cant figure it out. Nitron R3 comes with 5 bolts top-mount; while my car uses 3-bolts. I know the diff in bolt sizes (M8 and M10) -- question is can I use the 5 bolts top mount to my 3-bolts chassis while only using M8 bolts too? Have anybody done this before and any feedback on how it holds up? Thankyou guys!! |
04-15-2024, 09:58 AM | #2 |
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Not good rates for the R3 with a divorced rear spring. I’m not sure why F/R 700/750 lbf/in were selected? Those spring rates are close to what you’d run with a coilover rear setup. A divorced rear would be more like 700/1100 lbf/in divorced rear or 700/600 lbf/in for a coilover rear. If you were going for a flat-ride setup you’d run ~700/1400 lbf/in but you won’t find a spring long enough or have sufficient travel for a 1400 lbf/in rear spring so you’d have to switch to a coilover rear.
So, no, those are not good street or track rates. If you want a pure, or biased, street setup, I’d recommend 500/800 lbf/in which is what I installed on my wife’s DD f22 240ix with MCS 2WR dampers. No. You cannot install a 5-bolt camber plate to a 3-bolt strut tower. You could drill the two additional holes but I’d recommend getting 3-bolt camber plates. Last edited by M3SQRD; 04-16-2024 at 04:59 AM.. |
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04-15-2024, 04:48 PM | #4 |
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Where did you get these speced this way? It sounds like you may have purchased them 2nd hand. We deal with Nitron everyday as a rebuilder and sales center and there are some setups that are softer in the rear, but generally the front is very low in that case. Either way reach out and Ill get you the top mounts you need (sounds like you need 3-bolt mounts) and the springs that make sense. Just let me know. Sounds like Im going to need to become a forum sponsor.
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04-16-2024, 10:50 PM | #5 | |
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04-16-2024, 10:53 PM | #6 | |
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04-16-2024, 10:55 PM | #7 |
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Chris at Intertia Labs is the North American Nitron specialist/dealer. My R1s are spec’d through him and know many people with Nitrons spec’d through him on various platforms. Strongly recommend giving him a call and working through this to get set up appropriately 👍🏽
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04-17-2024, 01:40 AM | #8 | |
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You may not need a helper spring in the front for spring rates < 400 lbf/in. A helper spring could still be used but it would be fully compressed at full droop which defeats the purpose of a helper spring. For the typical range of spring rates used on the rear, a helper spring is not needed because the main spring remains seated at full droop. Definitely reach out to Inertia Lab because they are the preferred Nitron dealer in the US. He can get you everything you need, including the ideal spring rates for your needs. |
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04-17-2024, 01:23 PM | #9 | |
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Any idea why someone would be spec’ing R3 with F/R 700/750 lbf/in (R divorced) spring rates? Handling balance is biased way too far towards understeer. Separate questions…what %change in spring rate can a R1 and/or R3 handle before needing to be revalved? Will the eT R1 and eT R3 handle similar rates to the conventional R1 and R3 dampers? Will the Nitron DCU give you more control over the eT dampers compared to the EDC plug-n-play eT dampers? What are the spring rates for the eT Roadsport setup? Thanks. |
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coilover, nitron r3, spring rate, top mount |
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