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I personally would choose between novitec (being an affordable option) or intrax if money where no concern,
Hi, to add to this, there are actually two Intrax price options from Intrax / Alfa9.

The first is the XL, and the cost is higher. This gives the stiffest rear unit possible at 52mm!

The second is the 1K2, which uses an upside down rear MacPherson unit with a very stout 45mm insert tube. This one is much more affordable than the full race XL and offers nearly all of the same benefits as the XL. Simple 1-way adjustability makes it suitable to anyone and gives easy adjustment for street or track use.

104576
 

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Hi, to add to this, there are actually two Intrax price options from Intrax / Alfa9.

The first is the XL, and the cost is higher. This gives the stiffest rear unit possible at 52mm!

The second is the 1K2, which uses an upside down rear MacPherson unit with a very stout 45mm insert tube. This one is much more affordable than the full race XL and offers nearly all of the same benefits as the XL. Simple 1-way adjustability makes it suitable to anyone and gives easy adjustment for street or track use.

View attachment 104576
Intrax offers a few variants:

1k2
1k2 XL
2k2
2k2 XL
4 way

On each variant you can add:
Black titan (to resist corrosion)
ARC (Anti Roll Control) - for front
ARC - for rear

So, there are many combinations possible.
 

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Intrax offers a few variants:

1k2
1k2 XL
2k2
2k2 XL
4 way

On each variant you can add:
Black titan (to resist corrosion)
ARC (Anti Roll Control) - for front
ARC - for rear

So, there are many combinations possible.
Yes, many variations possible, we have sold them in nearly every configuration>> happy to break down the differences. Just shoot us an email.

Also, all Intrax have the unique thermostatic valve, which ensures consistent dampening operation both cold and hot. So when you setup your comp/rebound this is a cool feature.
 

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So y'day I got to drive 3 different 4C's. One with Nitron singles, one with Nitron 3-way adjustable & one on KW V2's. My opinion, for what it's worth, is that both Nitron variants are more suitable for the track & less so for road. For what I am looking for, therefore, I went for the KW's.

I wasn't able to get any of the cars above 100mph since I was on the road (& it was chucking it down, to boot) & I obviously didn't go on track. I can't say definitively how good the Nitrons would be on track, nor how close or otherwise the KW's would be next to them. But for my own purposes, where I'm looking for a solution to a car that's going to spend 90% of it's time on the road, the KW's gave a significantly more composed, supple ride than either of the Nitrons or stock OEM.

Added bonus: the KW's were a good deal cheaper than the Nitron singles.

Cheers,
Hedge
 

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So y'day I got to drive 3 different 4C's. One with Nitron singles, one with Nitron 3-way adjustable & one on KW V2's. My opinion, for what it's worth, is that both Nitron variants are more suitable for the track & less so for road. For what I am looking for, therefore, I went for the KW's.

I wasn't able to get any of the cars above 100mph since I was on the road (& it was chucking it down, to boot) & I obviously didn't go on track. I can't say definitively how good the Nitrons would be on track, nor how close or otherwise the KW's would be next to them. But for my own purposes, where I'm looking for a solution to a car that's going to spend 90% of it's time on the road, the KW's gave a significantly more composed, supple ride than either of the Nitrons or stock OEM.

Added bonus: the KW's were a good deal cheaper than the Nitron singles.

Cheers,
Hedge
How did the Nitrons compare to stock?
 

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So y'day I got to drive 3 different 4C's. One with Nitron singles, one with Nitron 3-way adjustable & one on KW V2's. My opinion, for what it's worth, is that both Nitron variants are more suitable for the track & less so for road. For what I am looking for, therefore, I went for the KW's.

I wasn't able to get any of the cars above 100mph since I was on the road (& it was chucking it down, to boot) & I obviously didn't go on track. I can't say definitively how good the Nitrons would be on track, nor how close or otherwise the KW's would be next to them. But for my own purposes, where I'm looking for a solution to a car that's going to spend 90% of it's time on the road, the KW's gave a significantly more composed, supple ride than either of the Nitrons or stock OEM.

Added bonus: the KW's were a good deal cheaper than the Nitron singles.

Cheers,
Hedge
^+1.

How did all of the three compare to stock really? And do you have OEM standard or sport?

I have the understanding that KW has a more compliant behavior, but how was roll compared to stock?

Appreciate that you took the time, hoping you have time to elaborate slightly.
 

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What damper settings were each set at? The comparison only really works if you're trying each at similar damper settings and then performing the test multiple times with the dampers in various settings for example full soft, middle, full hard.

Stock is very overdamped, so really any aftermarket coilover will ride better if you use a softer damper setting. Stock kind of feels like my Novitec Black with the dampers set to nearly full hard
 

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What damper settings were each set at? The comparison only really works if you're trying each at similar damper settings and then performing the test multiple times with the dampers in various settings for example full soft, middle, full hard/QUOTE]

No idea. They were set/ decide upon by Ben. He did mention them to me but it all went over my head. I went on how the car felt to me. And it felt spot on.

I'll ask him when he's back from hols next week.

Cheers,
Hedge
 

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They’re plusher, for sure. Not as supple a ride as the KW’s but they give a less crashy ride than stock, still. I’d imagine they’re pretty tasty on track.

Cheers,
Hedge
@Hedge , I actually meant it seriously, I do not understand “plush”😅 Google did not really give me the meaning of the sentence either🤔 Would you mind translating to more standard English?
 

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@Hedge , I actually meant it seriously, I do not understand “plush”😅 Google did not really give me the meaning of the sentence either🤔 Would you mind translating to more standard English?
Plush = comfortable/soft/smooth/high quality

Imagine velvet, the fabric, we would call that 'plush'
 

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@Hedge

That's fair. I'm not saying your conclusion is wrong but just that the comparison is flawed a bit if there isn't some consistency in damper settings. I have Novitec Black and with dampers towards the softer end of the rebound they ride far better than stock despite having more than double the spring rates of stock. They completely transformed the car for me. Previously I was very frustrated by the ride over sharper bumps and potholes, now I'm completely happy with it.
 

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Discussion Starter · #35 ·
Hey bud, and happy to see a fellow Brit providing some guidance.

So I'm looking at whether to go ahead with this (I can never decide whether to keep the car or trade up for a Cayman GT4...)

Now thinking of keeping the car for a while. Was the tramlining improvement? I do some motorway mileage and generally think it's impossible to commit on my local B-roads because it's just at constantly risk - even on a straight road - of being thrown sideways into traffic, because they're narrow, bumpy roads.
 

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GT4 is the perfect daily (said only 4C and lotus owners lol) Budget and garage space allowing a GT4 is definitely my goal for a 4C stable mate. I dig the graphite blue metallic they had a few years back with gloss black trim.

118517
 

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So y'day I got to drive 3 different 4C's. One with Nitron singles, one with Nitron 3-way adjustable & one on KW V2's. My opinion, for what it's worth, is that both Nitron variants are more suitable for the track & less so for road. For what I am looking for, therefore, I went for the KW's.

I wasn't able to get any of the cars above 100mph since I was on the road (& it was chucking it down, to boot) & I obviously didn't go on track. I can't say definitively how good the Nitrons would be on track, nor how close or otherwise the KW's would be next to them. But for my own purposes, where I'm looking for a solution to a car that's going to spend 90% of it's time on the road, the KW's gave a significantly more composed, supple ride than either of the Nitrons or stock OEM.

Added bonus: the KW's were a good deal cheaper than the Nitron singles.

Cheers,
Hedge
This is interesting info.
What were spring rates of these?
Springs have huge effect (i would say #1) on plushness/comfort.

Stock spring rates on non sport suspension IIRC are:
Front; 125 lbs/in - 22 N/mm
Rear; 200 lbs/in - 35 N/mm

Official KW v2 info on springs:
Front; 170 lbs/in - 30 N/mm
Rear; 285 lbs/in - 50 N/mm

I had Novite Corse + Black Series - which are KW v2 based - they had stiffer springs:
Front; 285 lbs/in - 50 N/mm
Rear; 400 lbs/in - 70 N/mm

On the mid dumping setting they were not too harsh/jarry.
 

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Hey bud, and happy to see a fellow Brit providing some guidance.

So I'm looking at whether to go ahead with this (I can never decide whether to keep the car or trade up for a Cayman GT4...)

Now thinking of keeping the car for a while. Was the tramlining improvement? I do some motorway mileage and generally think it's impossible to commit on my local B-roads because it's just at constantly risk - even on a straight road - of being thrown sideways into traffic, because they're narrow, bumpy roads.
I do find tramlining improves the softer I go with the damper rebound (springs too but most of us will never try different spring rates, we buy one set of coilovers and that's it so let's assume the spring rate is a constant).

I'm in the same boat with deciding to keep the car or move up, and have been thinking about it for a while. I'm more likely to go to a Mclaren 570S though as its ethos is more along the lines of the 4C just more grown up and developed. Love the idea of a manual GT4 but the clinical-ness might be a bit boring coming from the crazy 4C.
 

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Discussion Starter · #40 ·
I do find tramlining improves the softer I go with the damper rebound (springs too but most of us will never try different spring rates, we buy one set of coilovers and that's it so let's assume the spring rate is a constant).

I'm in the same boat with deciding to keep the car or move up, and have been thinking about it for a while. I'm more likely to go to a Mclaren 570S though as its ethos is more along the lines of the 4C just more grown up and developed. Love the idea of a manual GT4 but the clinical-ness might be a bit boring coming from the crazy 4C.
I've come to trust the UK's premier 4C sales specialist recently and he gets GT4s in quite often. Having driven one, the long gearing is the only thing which frustrates me. The rest of the car is stunning, in my opinion, as clinical as it is. He agrees and thinks it'd be perfect given how I enjoy my cars.

I'm not in a financial position to deal with how ruinously expensive a 570 could be if it goes wrong, whereas most GT4s have extended warranties from Porsche...
 
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