Ohlins R&T Spring/Sway Choice

[Slideways]

Any updates from those that have swapped the stock 400 Ohlins springs to a softer 340ish spring such as this - https://3dmmotorsport.com/collection...32802582298729 ?

I'm trying to add as much comfort as possible to the R&Ts and want to change as few parts as possible. Parts list so far: 2.5in spring perches will be needed for the Turner Street plates, 340 Ohlins 7.87 springs, Ohlins front strut spacers and an aftermarket front sway bar.

[repoman89]

Any updates from those that have swapped the stock 400 Ohlins springs to a softer 340ish spring such as this - https://3dmmotorsport.com/collection...32802582298729 ?

I'm trying to add as much comfort as possible to the R&Ts and want to change as few parts as possible. Parts list so far: 2.5in spring perches will be needed for the Turner Street plates, 340 Ohlins 7.87 springs, Ohlins front strut spacers and an aftermarket front sway bar.

I’m running basically this setup. 7.5” length 2.5” diameter springs 350lb/in driver side and 325 passenger with Turner perches on their street plates, 3DM spacers, CSL front bar. It’s just about perfectly neutral with a square setup and hard to unsettle on track — and totally drivable on shitty New England streets on ZCP 19s. I did the typical 60% bump 40% droop setup for the front struts and ended up at 13.7” fender to wheel cap ride height. No issues with spring perch to tire contact with 9.5” ET35s. Can’t speak to the extra third inch length on those springs but doubt it would be a problem.

[SQ13]

I’m running 8” swift springs with no issues. You should be fine.

[fattycharged]

Any updates from those that have swapped the stock 400 Ohlins springs to a softer 340ish spring such as this - https://3dmmotorsport.com/collection...32802582298729 ?

I'm trying to add as much comfort as possible to the R&Ts and want to change as few parts as possible. Parts list so far: 2.5in spring perches will be needed for the Turner Street plates, 340 Ohlins 7.87 springs, Ohlins front strut spacers and an aftermarket front sway bar.

I just received my Hybrid plates, I would absolutely go with the hybrid design after having both in my hand.


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[Tbonem3]

Any updates from those that have swapped the stock 400 Ohlins springs to a softer 340ish spring such as this - https://3dmmotorsport.com/collection...32802582298729 ?

I'm trying to add as much comfort as possible to the R&Ts and want to change as few parts as possible. Parts list so far: 2.5in spring perches will be needed for the Turner Street plates, 340 Ohlins 7.87 springs, Ohlins front strut spacers and an aftermarket front sway bar.

I have MCS, not Ohlins, but I went with a 60n/mm spring (342lb) and I love it. I found 400 to be too much. My car is fairly light for a street car.

On e90, I have R&T ready to go and they come with the 60n/mm springs from the get go. With something like 680 in the rear, I think the rates Ohlins chose for e9x are better than the 400/628 they chose for e46.

[Slideways]

I just received my Hybrid plates, I would absolutely go with the hybrid design after having both in my hand.


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Do those make any noise after a few thousand miles? The street version has been stock-like in terms of NVH. This is the early street version, so I am not sure if the quality has changed over the years.

[fattycharged]

Do those make any noise after a few thousand miles? The street version has been stock-like in terms of NVH. This is the early street version, so I am not sure if the quality has changed over the years.

I'm not sure, I haven't run it yet, though I’ve never been a fan of the rubber/poly strut mount, much prefer a spherical.
I'll try and take some decent photos this evening, I was just waiting on springs to put them together.


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[fattycharged]

Boots for top and bottom of spherical to keep grime out.
Spherical is sandwiched in poly to minimize NVH, easily replaceable.
Worst thing I've noticed is the cheap 3 bolt mounting hardware sprayed with a rhino liner, all the bolts slightly corroded…


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[LSB4Me]

Any updates from those that have swapped the stock 400 Ohlins springs to a softer 340ish spring such as this - https://3dmmotorsport.com/collection...32802582298729 ?

I'm trying to add as much comfort as possible to the R&Ts and want to change as few parts as possible. Parts list so far: 2.5in spring perches will be needed for the Turner Street plates, 340 Ohlins 7.87 springs, Ohlins front strut spacers and an aftermarket front sway bar.

I actually have an update for you guys.

Having played with the dials more and driven the car a bit, I can now confirm that my 504lb rear springs are too soft. You were absolutely right, TBone. I plan to revert to the stock Ohlins 628lb rear springs next month as they will place me into the flat ride zone—albeit, just barely.

Additionally, my shop set the ride height for looks … without asking for my OK. The car looks great, but I am bottoming out on bumpy streets at slow speed. I’m going up in height at least 0.25”.

With all this said, even with the softer-than-ideal rear springs, I was able to dial the car in for that lovely rotation feeling and achieved better ride comfort. I am still much happier with the car now than when the stock 400lb Ohlins springs were up front. Those were VERY stiff and really upset the ride in Los Angeles.

[Slideways]

I actually have an update for you guys.

Having played with the dials more and driven the car a bit, I can now confirm that my 504lb rear springs are too soft. You were absolutely right, TBone. I plan to revert to the stock Ohlins 628lb rear springs next month as they will place me into the flat ride zone—albeit, just barely.

Additionally, my shop set the ride height for looks … without asking for my OK. The car looks great, but I am bottoming out on bumpy streets at slow speed. I’m going up in height at least 0.25”.

With all this said, even with the softer-than-ideal rear springs, I was able to dial the car in for that lovely rotation feeling and achieved better ride comfort. I am still much happier with the car now than when the stock 400lb Ohlins springs were up front. Those were VERY stiff and really upset the ride in Los Angeles.

Thanks for the update. Are you going with a stiffer front sway bar or keeping it stock?

[cobra]

I actually have an update for you guys.

Having played with the dials more and driven the car a bit, I can now confirm that my 504lb rear springs are too soft. You were absolutely right, TBone. I plan to revert to the stock Ohlins 628lb rear springs next month as they will place me into the flat ride zone—albeit, just barely.

Additionally, my shop set the ride height for looks … without asking for my OK. The car looks great, but I am bottoming out on bumpy streets at slow speed. I’m going up in height at least 0.25”.

With all this said, even with the softer-than-ideal rear springs, I was able to dial the car in for that lovely rotation feeling and achieved better ride comfort. I am still much happier with the car now than when the stock 400lb Ohlins springs were up front. Those were VERY stiff and really upset the ride in Los Angeles.

How do you know the rear springs are too soft and you aren't just lacking compression damping?

[LSB4Me]

Thanks for the update. Are you going with a stiffer front sway bar or keeping it stock?

I’m going to keep the bars stock until I settle on the springs, pun intended. Need less variables.

[LSB4Me]

How do you know the rear springs are too soft and you aren't just lacking compression damping?

Ah, this is a good question. Having adjusted the rear shocks a great number of times (I know, the adjustment relates primarily to rebound), I learned the following with 504lb rear springs: (1) at 15+ clicks, the rear moves around almost constantly, often times out of sync with the front, and weight transfer becomes noticeable under even moderate acceleration; and (2) at <10 clicks, the rear loses compliance, nvh is noticeably increased, and feel begins to degrade.

I am no expert, but I do have a broad and extensive experience behind the wheel of the “benchmark” cars currently on offer. If nothing else, I know what feels right to me. YMMV, of course.

[cobra]

Ah, this is a good question. Having adjusted the rear shocks a great number of times (I know, the adjustment relates primarily to rebound), I learned the following with 504lb rear springs: (1) at 15+ clicks, the rear moves around almost constantly, often times out of sync with the front, and weight transfer becomes noticeable under even moderate acceleration; and (2) at <10 clicks, the rear loses compliance, nvh is noticeably increased, and feel begins to degrade.

I am no expert, but I do have a broad and extensive experience behind the wheel of the “benchmark” cars currently on offer. If nothing else, I know what feels right to me. YMMV, of course.

Yeah it's a tricky thing to dial in especially if you don't have the ability to independently adjust compression and rebound.
How's the grip/handling balance at the limit. More understeer or oversteer?

[Grke46m3]

Any updates from those that have swapped the stock 400 Ohlins springs to a softer 340ish spring such as this - https://3dmmotorsport.com/collection...32802582298729 ?

I'm trying to add as much comfort as possible to the R&Ts and want to change as few parts as possible. Parts list so far: 2.5in spring perches will be needed for the Turner Street plates, 340 Ohlins 7.87 springs, Ohlins front strut spacers and an aftermarket front sway bar.

Any updates on this? Have you bit the bullet and ordered these springs?


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