CSG and RCE tag-team suspension Q&A thread! Ask us anything!

[Racecomp Engineering]

Originally Posted by DeaconRoc

@Racecomp Engineering @CSG Mike @CSG David I'm looking to change my spring set up on my Motons as I have been running a more street friendly set up with occasional track but am now using the car more for track with occasional street. Currently I have a 200mm 4kg rear spring with no helper and a 150mm 5kg front spring with a 2kg 50mm helper. I'm looking at a 7kg 140mm front spring with a 40mm 3kg helper and on the rear a 170mm 8kg main spring with a 40mm helper. Can you see any problems I'm missing with this set up change?

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What tires?

- Andrew

[Racecomp Engineering]

Originally Posted by norcalpb

Which of these 2 setups do you think is the best for DD (25k miles/year) and 6 track days a year?

Both are twin tube, single adjustable coilovers from companies that specialize in suspension parts and have a lot of experience with this chassis. Both have plenty of good reviews from daily drivers and track day people.

I use the RCE SS1s on my own car and prefer them to some coilovers costing twice as much. Lots and lots of travel, awesome camber plates, good quality valving and adjustment. Great on the street and with the right set up you'll be fast on the track too.

Nothing bad to say about the Teins. At any price point, support and set up are incredibly important. The best coilovers are worthless without proper set up.

- Andrew

[DeaconRoc]

Originally Posted by Racecomp Engineering

What tires?



- Andrew

Currently Michelin PS4 for street and Yoko AD08RS for track. Will be swapping to either Nankang AR1 or Yoko A052 next for track with PS4 or Goodyear Eagle F1 Supersport for street.

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[CSG Mike]

Originally Posted by DeaconRoc

@Racecomp Engineering @CSG Mike @CSG David I'm looking to change my spring set up on my Motons as I have been running a more street friendly set up with occasional track but am now using the car more for track with occasional street. Currently I have a 200mm 4kg rear spring with no helper and a 150mm 5kg front spring with a 2kg 50mm helper. I'm looking at a 7kg 140mm front spring with a 40mm 3kg helper and on the rear a 170mm 8kg main spring with a 40mm helper. Can you see any problems I'm missing with this set up change?

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As long as your shock body will be able to properly mount the springs, no issues.

You may find the setup quite different from your old setup, but I approve of the newfound rotation!

[DeaconRoc]

Originally Posted by CSG Mike

As long as your shock body will be able to properly mount the springs, no issues.



You may find the setup quite different from your old setup, but I approve of the newfound rotation!

Is there any detriment to a longer spring on the rear damper for the main spring compared to the front main spring (170mm rear compared to 140mm front)?

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[CSG Mike]

Originally Posted by DeaconRoc

Is there any detriment to a longer spring on the rear damper for the main spring compared to the front main spring (170mm rear compared to 140mm front)?

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Not really, as long as both sides are articulating properly.

[RAUL1080]

I'm getting the dreaded axle click. Purchased car with 10k miles and currently has 17k No drifting/auto x, very rare spirited driving. On stock rim/wheels no click but on the 17x9 rpf1's with 245 tire, I get the click. iv replaced the axle nut twice and retorqued to 160 and still get the click on acceleration/load. Do you suggest replacing with stock used axles/purchasing new axles from surtrack or go ahead and buy the DSS axles? I'm on 100% stock suspension.

[Racecomp Engineering]

Originally Posted by DeaconRoc

Is there any detriment to a longer spring on the rear damper for the main spring compared to the front main spring (170mm rear compared to 140mm front)?

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As long as the springs you're using have enough travel so you can use all your damper compression travel, you're good. Might want to look up the spring specs to verify (Swift for example posts how much travel their coilover springs and helper springs have).

So you might have to measure how much compression travel your dampers have at your desired ride height and compare to your spring specs.

You want to avoid coil bind. You're almost certainly okay in the rear, probably okay in the front.

Spring rates are good for the tires btw.

- Andrew

[DeaconRoc]

Originally Posted by Racecomp Engineering

As long as the springs you're using have enough travel so you can use all your damper compression travel, you're good. Might want to look up the spring specs to verify (Swift for example posts how much travel their coilover springs and helper springs have).



So you might have to measure how much compression travel your dampers have at your desired ride height and compare to your spring specs.



You want to avoid coil bind. You're almost certainly okay in the rear, probably okay in the front.



Spring rates are good for the tires btw.



- Andrew

Thanks for the advice. They're Eibach ERS springs and looking at their website it suggests there is a 9mm difference in travel before coil bind between the 140mm 7kg spring and the 170mm 7kg spring. I've ordered both lengths for the front to see which works the best as it seemed the best option. If the 170mm fits OK with the tender I'll go with that option.

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[Brz-123]

I have a 2015 BRZ with OE suspension and I want to make it more road/pothole friendly. Would replacing with a 2018 86 suspension make it noticeably softer on road? And are they compatible on older car? Thanks in advance

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[Racecomp Engineering]

Originally Posted by Brz-123

I have a 2015 BRZ with OE suspension and I want to make it more road/pothole friendly. Would replacing with a 2018 86 suspension make it noticeably softer on road? And are they compatible on older car? Thanks in advance

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It'll make it slightly better. Yes they're compatible.

- Andrew

[Brz-123]

Originally Posted by Racecomp Engineering

It'll make it slightly better. Yes they're compatible.



- Andrew

Thank you Andrew. Much appreciated.

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[CSG Mike]

Originally Posted by Brz-123

I have a 2015 BRZ with OE suspension and I want to make it more road/pothole friendly. Would replacing with a 2018 86 suspension make it noticeably softer on road? And are they compatible on older car? Thanks in advance

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If the UK spec is anything like the USDM specs, yes. Also recommended you do the 17+ rear sway ($75 USD online).

It will transform the car; it's what I think the car should have been out of the box in 2012!

[StormFalcon]

I'm looking into getting the CSG Spec Flex A coilovers for track use and DD. Do these fit with the Raceseng Cascam Plates + 2" Rear Upper Mounts? I also plan on installing a whiteline bump steer and roll center correction kit. Would it be possible to achieve a
1. 2" drop
2. 2 - 3 degrees of camber front and back
3. 0.1 degrees of toe out front and 0 degrees of toe back
4. 7 degrees of caster
with just the previously mentioned setup or do I need supporting suspension mods? Are there any other reasons to get supporting suspension mods (like control arms, tie rods, stuff like that)?