DIY: Moton Club Sport coilover install
#51
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dennis grant recommends setting spring rates via natural frequency (NF) (2.2Hz front, 2.5Hz rear). note these NFs are for a dedicated autox car. there's a lot of debate over the value of natural frequency. carroll smith (tune to win, driveto win, etc.) didn't put much stock in it. smith recommended to go with the softest spring rate in rear that kept the inside rear on the ground and to then tune with the fronts. in my research 2.5Hz front and 2.2Hz rear for the rx-8 is a good starting point to set the suspension envelope. it's not gospel, but it's a good start.
afa spring lengths for the motons, as you found out 8" Lo (spring length abbreviation) for the rear is too tall. 7" puts the spring nearly at the bottom of the threads for a 26" ride height. 6" is good for the rear. for the fronts 8" is good, but with a 2.5" ID at a 26" ride height you'll notice you can't go much lower since the spring's diameter is too wide to go past the upper a-arm opening. as such a 7" is a better bet.
afa spring lengths for the motons, as you found out 8" Lo (spring length abbreviation) for the rear is too tall. 7" puts the spring nearly at the bottom of the threads for a 26" ride height. 6" is good for the rear. for the fronts 8" is good, but with a 2.5" ID at a 26" ride height you'll notice you can't go much lower since the spring's diameter is too wide to go past the upper a-arm opening. as such a 7" is a better bet.
Last edited by shinronin; 06-27-2007 at 11:36 AM.
#52
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Eibach doesn't offer a 6" 2.5 ID 325lb spring. I take it you sourced another manufacturer.
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Last edited by PUR NRG; 05-01-2011 at 08:15 AM.
#53
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yep, i went with 2.25" ID hypercos. i'm going to see about having a spare set of the rear delrin upper spring perches machined down to accommodate a 2.25" ID spring. hyperco has a very good selection of springs in 2.25" ID. to stay with eibach 2.5" ID go with 7" Lo all around. to stay with eibach, i'd recommend the following part #s:
2.25" ID: 0700.225.0650 and 0700.225.0325
2.50" ID: 0700.250.0650 and 0700.250.0325
2.25" ID: 0700.225.0650 and 0700.225.0325
2.50" ID: 0700.250.0650 and 0700.250.0325
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heh, for some reason i didn't get an update about your post team. do you mean to say that you recommend substantial time on the 650/325 combo before making about a recommendation about it? if so, i think i did qualify the recommendation as only a better starting point than 700/400. that's all i was attempting to convey.
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i just posted an update on some new suspension bits and setup info in teamrx8's mod/STU thread.
Last edited by shinronin; 10-17-2007 at 12:32 PM.
#61
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Internet Archive Wayback Machine to the rescue:
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https://web.archive.org/web/20080509...ock_moton.html
Robin's entire site is preserved there.
Please consider donating some cash to support the Internet Archive!
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#63
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Whenever you find a valuable site that is at risk of disappearing, enter the URL at the Archive and there will be a "Save this site" button to store a snapshot in the Wayback Machine. Even if it's already been stored, it registers as a "hit" that will keep the snapshot updated.
You'll find some sites expressly prohibit the Archive from preserving them (via robots.txt), but those sites deserve to disappear for being stupid.
You'll find some sites expressly prohibit the Archive from preserving them (via robots.txt), but those sites deserve to disappear for being stupid.
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