Suspension adjustment - bump/rebound

[DazBlackCSL]

Will get my settings on Friday for you, if your interested and post up when im back as im there on friday ...

Exhaust will be on for drive home !!!!!!!!!!!:whistle::smokin:

[bryce]

That'd be spot on Daz, as you seem to use your car quite a bit for the road. Keep a note and fire them up here please :beer:

Oh, and I wanna see/hear a vid of this new zorst!

[DazBlackCSL]

That'd be spot on Daz, as you seem to use your car quite a bit for the road. Keep a note and fire them up here please :beer:

Oh, and I wanna see/hear a vid of this new zorst!

Na Worries my man :thumbs:

Will do .... all being well will do some cheeky vids and the obligatory pics over the weekend !!:whistle:

[CATDT]

Bryce - apologies for the delay but our event took it out of us yesterday :hahaha:

Here is Colin's written information for you - but as he says, a verbal conversation is easier, so if you would like to chat any aspect through he'll be very happy to do so. He will next be in the office on Thursday.

Jo
-----
The Variant 3 system is track focused and offers little adjustment of the ride comfort setting. If you look at the adjustments more commonly found on a race or track damper it will help to understand what is happening underneath you when the wheel is excited by the road or the vehicle negotiates a corner.

Race/ Track dampers commonly have up to 3 settings (Variant 3s have 2)

High Speed Bump
This adjustment controls how the wheel reacts when the wheel is accelerated quickly over large bumps and holes in the road or a kerb or rumble strip on a circuit. It is controlling the unsprung mass of the wheel and suspension. High speed is not referring to the speed of the car but the speed of the impact and deflection experienced by the suspension. If the owner sets this overly stiff for the driving conditions the tyre will not follow the road, and grip can be reduced considerably, especially in the wet. On your Variant 3s this has been pre set by the factory and is not adjustable.

Low Speed Bump
This is adjustable on the Variant 3 and offers subtle adjustment of the unsprung mass consequently this reduces, in a limited way, body roll - reducing roll rates as you brake corner and accelerate. This adjustment offers fine control, a vernier adjustment with smaller gains in body control than the rebound adjuster.

Rebound Adjustment
This is adjustable on the Variant 3s. Its main function is to control the body’s dynamic movement. Remember as the body rolls the suspension is deflected through its range of movement, a soft setting can have a negative effect on circuit and road. Exaggerated body roll can affect the tyres capability to remain perpendicular to the road, as larger camber changes will be experienced by the tyre.

In summary by backing off both adjusters you have reduced the bodies resistance to dynamic movement (Dive, Roll and Pitch), hence the floating feel when changing lanes. But you still have stiff track focused high speed pre set bump settings, so the wheel is finding it difficult to follow the road and cope with the additional body roll and subsequent camber change. I hope this all makes sense – it’s much easier to talk and demonstrate on circuit than explain in writing.

My recommendation would be to stiffen the settings and find a compromise, so the rebound and low speed bump give a more predictable feel to the vehicle and ride comfort is reduced but acceptable. When you have one adjustment on a performance damper you are invariably adjusting rebound adjustment, as manufacturers do not like to give you isolated high speed bump adjustment, as it can compromise safety if set to stiff.

[Nords]

Interesting, so is it just 'overall' damping that is adjusted on Intrax? What does 'THIS BIT HERE' do?

[_Nathan_]

There is a fixed bump and rebound curve - that single adjuster simply moves both bump and rebound along that curve. You have to be a very good driver or have data logging on the dampers to get a benefit from the 4 way Intrax IMO (and also that of Intrax when I discused upgrading to 4 ways with then to see if I'd actually be able to make them work better than the 1K2s).

With a fixed curve at least you are limited to how rubbish you can make the setup!

[_Nathan_]

And don't mess around with the other bit.

[shimmy]

although the other bit (well around that bit anyway) is the camber adjustment plate as you already know!

[Bealo]

No problem, will do :beer: Whats yours set at just now anyway?

Thanks :thumbs:

Off the top of my head i can't remember, i've got it written down at home. But i remember that road settings are pretty soft.

[Bealo]

Will get my settings on Friday for you, if your interested and post up when im back as im there on friday ...

Exhaust will be on for drive home !!!!!!!!!!!:whistle::smokin:

Thanks Daz

Maybe we can get a thread/sticky going about users settings on different tracks for the different makes of coilovers.

That way we can all learn from each others experiences.:thumbs:

[bryce]

Jo,

Pass on my thanks to Colin, that write up is just spot on - gives me a complete understanding of what Im adjusting, and how it'll affect the car.

I'll have a fiddle with it this weekend and see how I get on. If Im having problems I'll give you lads a shout as you know your stuff. You open saturdays?

:beer:

[CATDT]

You open saturdays?
:beer:

I'll be around but Colin will be training. Give me a call if you need to and then he'll either return your call that evening or on Sunday.

Enjoy the fiddling!

Jo

[bryce]

Thank you :thumbs:

[bryce]

Got it

Well I had a fiddle with the settings last night, and took it a good spin today.

Ride is now perfect, its firm but not harsh. Follows contours alot better and reacts to bumps/ dips well. Higher speeds are good, but still not perfect - still got that floaty feel - which on road is acceptable.

Settings are as follows (from Full Hardest -turn towards softer)

FRONT
Bump - 1.5 full turns
Rebound - 2.0 full turns

REAR
Bump - 1.5 full turns
Rebound - 2.5 full turns (I thought this was just 2.0 ft's, but looking at my notes Ive got 2.5 written - I'll check sometime, if I aint had too many pies, its tight underneath!)

Daz & Bealo, get your settings fired up :thumbs:
Would be a good idea to have a 'KW settings' specific thread really for comparison.

[Nords]

jeez thats soft Nords :whistle:

standard CSL suspension is about -20F -25R and is better than stock on Intrax i have found

I'm running Intrax 1K2 suspension and I have been wizzing around on max softness but having found John suspension settings list, he recommends front 30 off max and rear 35 off max.

Once I get it back I'll try 20/25 and see what the difference is...

I found Intrax's basic suspension FAQ page with links for other stuff here if anyone is interested.

PS Mods, can we add 'Intrax/KW' to the start of this thread's title and place it in the tech area please? Perhaps just Intrax as there is a KW thread which has just started...

Going back to my picture does the 50 click adjuster alter both rebound and compression at the same time?

"1K2" “2-way adjustable mono tube : high end modular built”.

Adjustable;
1 - Rebound and compression damping-range in 50 positions.
2 - Spring-preload fully adjustable.

Other features;
3 - Mono-tube damper construction.
4 - Internal pressurised nitrogen reservoir.
5 - Advanced thermostat valve for constant damping at whole temperature-range.
6 - Modular built for endless flexibillity.

Options;
1 - Length-adjustment mostly +/- 5mm.
2 - Choice of materials like lightweight aluminiumt/titanium or strong Steel/INOX*.
3 - Internal check-valve for completely seperated compression and rebound.
4 - Can be combined with revolutionary 45mm Slider STRUT-Concept.
5 - Can be combined with fully adjustable camber-plates.
6 - Can be combined with 36mm, 40mm and 46mm main piston diameter.
7 - Can be combined with 14mm, 16mm, 20mm and 22mm piston-rod diameter.