27 replies to this topic

[Spitfire Engineering]

 

How stiff is the CF blade ARB on full stiffness compared to the EP 1" ?

Front or rear? My rear is off the car at the moment and i have to say it exerts minimal force when testing it static on the car

 

 

It's used to trim the roll to match the front Simon.

 

[james_ly]

Had a chance to test it out on track on Friday. Definite improvement, makes a big difference in the slow and medium speed corners. Less roll means the front digs in better so I can get on the power sooner without understeering off the track. Worth every penny.

[Nev]

You could consider reducing your front spring rates after installing a stiffer front ARB, this is both theoretical (and in my experience also true in practice, albeit my car is quite different to most).

 

Bear in mind the OEM bar exerts 50 lb/inch (when it has new drop links), the 4 possible settings on the Elise Parts jobby that I have are 250 Lb, 200 Lb, 165 Lb, 140 Lb. So even on it's lowest setting (which is what I have it on) it's 3 times more powerful than OEM and thus indirectly increasing your front spring poundage when cornering.

 

I found that every time I dropped my front spring poundage my understeer decreased, I even went as low as 225 Lb front springs for a while, but have since increased these to 275 Lb just to stop the front of the car from bottoming out so much. My rear springs are 450 Lb BTW.

 

I've experimented with about 5 different front spring poundages and 3 of the ARB settings, so I offer this info from practical experimentation and testing on my own VX.

 

HTH.

 

 

 

 

 

Edited by Nev, 17 April 2017 - 01:38 PM.

[TFD]

I'm also not an "expert" (whatever that means nowadays..) but allways learned: Stiff ARB = Soft spring Hard spring = soft ARB Done this on my current setup (and previous cars) and for road use it is allways working for me.

[Captain Vimes]

The better turn in is because of the increased front roll stiffness. Fitting softer springs would undo the benefit of the stiffer ARB and will also fail to control pitch.

[The Batman]

i run my 1" arb on full stiffness (ask flds mum) and i dont have soft springs and love how it handles and turns in. when it was on full soft it felt just wrong imo

[james_ly]

You could consider reducing your front spring rates after installing a stiffer front ARB, this is both theoretical (and in my experience also true in practice, albeit my car is quite different to most).

 

Bear in mind the OEM bar exerts 50 lb/inch (when it has new drop links), the 4 possible settings on the Elise Parts jobby that I have are 250 Lb, 200 Lb, 165 Lb, 140 Lb. So even on it's lowest setting (which is what I have it on) it's 3 times more powerful than OEM and thus indirectly increasing your front spring poundage when cornering.

 

I found that every time I dropped my front spring poundage my understeer decreased, I even went as low as 225 Lb front springs for a while, but have since increased these to 275 Lb just to stop the front of the car from bottoming out so much. My rear springs are 450 Lb BTW.

 

I've experimented with about 5 different front spring poundages and 3 of the ARB settings, so I offer this info from practical experimentation and testing on my own VX.

 

HTH.

 

 

 

 

 

 

Hmm I can believe that's possible on the road, but not the track. Otherwise, the Elise trophy racers would have Bilsteins on the front

[Nev]

Gawd.