RX8 Coilover Selection - RX8Club.com



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Old 03-10-2016, 05:47 PM   #1
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Question RX8 Coilover Selection

My son and I are working on some minor modifications of my 04 RX-8 to enjoy more our track days and with the intentions of competing in Autocross, time attack and road rally events. We want to improved the suspension with a good set of coilovers, but we can't decide which brand and setup to purchase.

We always haul the car to all the events, but not to the Autocross, which we drive. We are thinking in a good set of OHLINS coilovers, any advise Thanks
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Old 03-10-2016, 05:52 PM   #2
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You can't go wrong with Ohlins but you're asking a loaded question since there is so much to proper suspension tuning that goes far beyond just picking coilovers.
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Old 03-10-2016, 06:14 PM   #3
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Coilover Selection

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Originally Posted by 9krpmrx8 View Post
You can't go wrong with Ohlins but you're asking a loaded question since there is so much to proper suspension tuning that goes far beyond just picking coilovers.
We already change the sway bars and have adjustable links and we are running with Racing Beat springs and Tokico shocks which is not that bad but in Autocross not good. I'm thinking to go with 460 lbs/in front and 230 lbs/in back. I believe, but not sure, that this setup will give me better setting range for bumping tracks like Buttonwillow and Willow Springs but much better handling in Laguna Seca. Thanks for your input...
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Old 03-10-2016, 06:33 PM   #4
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Check this site out.

Autocross to Win (DGs Autocross Secrets) - Buying Shocks

Also, check out this youtube channel by a well known suspension builder called Fat Cat Motorsports

https://www.youtube.com/user/SuspensionTruth
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Old 03-12-2016, 04:21 PM   #5
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Originally Posted by Charles R. Hill View Post
Not to interrupt, but I just wanted to point out to those reading this that here is an example of the true purpose of coil-over suspension; so the car's suspension can be adjusted for each different track and not because they are cool toys to have for the street or show board. ;-)
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Old 12-10-2017, 03:09 PM   #6
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I too am looking at getting new coilovers for my series 2 as my front winter tires are rubbing due to the front end being too low (height adjustment is already maxxed out). I currently am running HSD Monopros. Any recommendations that will give me the ground clearance I require?
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Old 12-10-2017, 03:21 PM   #7
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Ground Clearance

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Originally Posted by DR_JDUBZ View Post
I too am looking at getting new coilovers for my series 2 as my front winter tires are rubbing due to the front end being too low (height adjustment is already maxxed out). I currently am running HSD Monopros. Any recommendations that will give me the ground clearance I require?
You can increase the spring force which will increase the ground clearance, but the downside is more suspension stiffness. You will need to play with the adjustments. Good luck
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Old 12-10-2017, 04:14 PM   #8
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Quote:
Originally Posted by DR_JDUBZ View Post
I too am looking at getting new coilovers for my series 2 as my front winter tires are rubbing due to the front end being too low (height adjustment is already maxxed out). I currently am running HSD Monopros. Any recommendations that will give me the ground clearance I require?
Is it the tires that are rubbing or the body of the car? Because if it's the tires, your problem isn't ride height. I had mine around 12.5" ride height at some point and the tires were fine. The splash guards were not.

Anyway, Ohlins are fantastic, as stated in this thread. I'm running MeisterR CRDs and very VERY pleased with them as well. They're only just now starting to enter north america.

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You can increase the spring force which will increase the ground clearance
Why must you turn this forum into a house of lies?

Last edited by Loki; 12-10-2017 at 04:16 PM.
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Old 12-10-2017, 05:34 PM   #9
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The tires are rubbing the fenders whenever I hit a bump or go to make a tight turn
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Old 12-10-2017, 05:42 PM   #10
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Originally Posted by DR_JDUBZ View Post
The tires are rubbing the fenders whenever I hit a bump or go to make a tight turn
What wheels are you running (in particular offset)? Because like I said, unless the HSD's are poorly designed for the car, you shouldn't be hitting the fenders. And you would hit bodywork on ground way before that. So if you have the wrong wheels, different coilovers aren't going to fix it. Especially if it rubs on a hard turn, that sounds like wrong offset, more than ride height problem.

Can you measure your ride height from center of the wheels to the top of the wheel arch?
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Old 12-10-2017, 05:48 PM   #11
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225/55R17 all around, summer wheels/tires are 225/40ZR19, 245/35ZR19. I want my car to atleast be stock ride height so I can finally go over some speed bumps without worrying about getting stuck.

Last edited by DR_JDUBZ; 12-10-2017 at 05:55 PM.
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Old 12-10-2017, 06:13 PM   #12
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Originally Posted by DR_JDUBZ View Post
225/55R17 all around, summer wheels/tires are 225/40ZR19, 245/35ZR19. I want my car to atleast be stock ride height so I can finally go over some speed bumps without worrying about getting stuck.
Those are tire, not wheel specs. Anyway, the HSDs should be able to give you near stock ride height, I have a couple of Miata friends with them (and the suspension is identical to ours). So what I'm saying is, installing new coilovers might be an expensive way to find out the coilovers aren't the problem. How did you determine they're at maximum ride height?
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Old 12-10-2017, 06:16 PM   #13
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What wheels are you running (in particular offset)? Because like I said, unless the HSD's are poorly designed for the car, you shouldn't be hitting the fenders. And you would hit bodywork on ground way before that. So if you have the wrong wheels, different coilovers aren't going to fix it. Especially if it rubs on a hard turn, that sounds like wrong offset, more than ride height problem.

Can you measure your ride height from center of the wheels to the top of the wheel arch?
Cant even fit my fingers between tdc of my tire to top of the wheel arch. I had my mechanic (1 year ago) adjust the suspension for max ride and they were unable to get any more ride height out of the front coilovers
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Old 12-10-2017, 06:18 PM   #14
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Cant even fit my fingers between tdc of my tire to top of the wheel arch

Center of the wheel. As in, where the lugnuts are.

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Old 12-10-2017, 06:26 PM   #15
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1'1"

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Old 12-10-2017, 06:59 PM   #16
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Yeah so you're lowered around 1.5". That shouldn't produce rubbing with correct wheel offset, so that's one thing.

You should be able to raise it higher with the HSDs. It's easy enough if you do your own work. There is no actual maximum on those, you just need to make sure about 20mm of tread remains in the part that attaches to the wheel knuckle. If you don't do your own work then... I guess it's even easier
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Old 12-11-2017, 06:41 AM   #17
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225/55R17
This size will have a substantially bigger overall diameter than stock -- 0.77" according to the calculator on this site. Bet this is part of your problem. And either way it's not optimal for your ABS and DSC.

Slight lowering alone wouldn't be an issue. A slight offset difference alone wouldn't be an issue. A slight tire size difference alone wouldn't be an issue. But put 2 or 3 of those together and, yeah, you could have problems.

On a 17" wheel, use 205/55R17 (a hair smaller than stock OD) or 215/55R17 (a hair bigger). Narrower is usually better for snow anyway.
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Old 12-12-2017, 07:41 PM   #18
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Problem is fixed, turns out there was some more vertical adjustment left in the coilovers. As for TC/ABS/DSC, I dont drive with them on anyways.
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Old 12-12-2017, 09:40 PM   #19
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You can't really turn ABS off... anyway, glad you fixed it!
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Old 12-13-2017, 06:05 AM   #20
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Pretty sure you can
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Old 12-20-2017, 11:33 AM   #21
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I have Penske 8300 double adjustable shocks one my rx8 and they use regular 2.5" ID coilover springs, They are pretty amazing to say the least.
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