Track setup to solve scrubbing on 172 cup using b14 coilovers

[3d3dman]

hi guys,

Did my first day day in my 172 cup today at rockinham, great fun however I suffered a large amount of scrubbing on many of the sharper corners. My car is a 172 cup running on standard Turini alloys with 195 45 16 tyres, the suspension is billstein b14. Looking on the forum I get a feeling this might be common on lowered 172 cup cars.

Does anyone know how to combat this, some ideas I found online are, running smaller 15" wheels instead of 16". Adding spacers. Increasing the height of the suspension. I don't know the best course of action so any advise would be appreciated ?

 

[3d3dman]

The car will be used solely for track use

 

[imprezaworks]

Where's the scrubbing, on the front?

And either get smaller wheels, or raise the suspension. I had b14's and from memory they don't go too low, just nice.

 

[3d3dman]

Yes just on the front

 

[imprezaworks]

Be the bumper brackets

 

[imprezaworks]

Like this

 

[3d3dman]

Yes, exactly the same noise, I videoed the lap so I know how it sounds

 

[imprezaworks]

http://www.cliosport.net/threads/bumper-bracket-mod-diy.602639/

 

[3d3dman]

Thanks, if I ran 15" wheels would this help instead of the mod?

 

[imprezaworks]

That video is of my old car with 205/50/15 rsr', so nope.

Bend away.

 

[3d3dman]

Ok will do, do I have to cut the plastic wheel arch

 

[JB21]

Bend the bracket back, remove the front arch liners and fogs lights and let it breath if a full on track car.

 

[imprezaworks]

Ok will do, do I have to cut the plastic wheel arch

Have you read that link

 

[3d3dman]

Yes I did, may just remove the wheel liner also.. I feel I need to bend it back further??.. just had yoko 195/50/16 fitted to make the situation worse.. I am going to increase the ride height

 

[imprezaworks]

195/50/16?

 

[3d3dman]

Yes that's correct

 

[imprezaworks]

Why?

Most go for

195/45/16, 205/45/16
195/50/15, 205/50/15

The higher profile on the ones you have won't be helping imo

 

[3d3dman]

Yokohama do not offer a track tyre at 195 45 16

 

[imprezaworks]

The ado8r's?

 

[STEVE.M]

Is that make shift G meter dangling from the rear view mirror by accident or design?

 

[imprezaworks]

Good luck charm.

Or the string off the magic tree.

 

[JB21]

They do the A048s in 195/50/16, pricey though.

 

[imprezaworks]

Yeah he's just fitted those?

Raising the suspension is the best solution

 

[3d3dman]

I reckon so and a bit more hammering, do you know what the standard ride height is measurement wise on the Clio cup 172 with Turinis ? If so, how is this being measured so I can determine how low she currently sits

 

[Bluebeard]

Mondeo sized tyres on a lowered Clio will never end well.

 

[3d3dman]

Is this going to be an issue?

 

[imprezaworks]

Only with the height, just need to raise it up, be fine then

 

[imprezaworks]

 

[3d3dman]

Now that made me laugh

 

[3d3dman]

We worked out the current ride height lowered must be 45ml low, this must be partly where the problem lies.. going to bash the bumper bracket even more tomorrow

 

[NorthloopCup]

The springs are too soft on b14's for pure track use. That will be adding to your rubbing issues.

 

[3d3dman]

Can the springs be changed ?

 

[NorthloopCup]

Can the springs be changed ?

Yes but only by about 50lbs either way, otherwise the dampers need revalving to suit. From memory b14 fronts are about 330lb up front and you need about 450+ ideally for all out track car.

You also need to stiffen the rear up to suit, as on a fwd car, the rear controls the front.

 

[3d3dman]

Do you have a link to the springs I would need to buy?

 

[NorthloopCup]

Afraid not mate. You'd need to find out the internal diameter of the fronts and order some stiffer springs from the likes of Faulkner springs.

For the rears you'd have to get custom made springs, or fanny about with short springs and a reduction of damper travel to stop them dislocating.

 

[3d3dman]

The best way forward is to adjust the height and test it out..if this doesn't work replace the whole suspension which isn't going to be cheap.. does anyone know somewhere that sells the adjustment spanner for bilstein?

 

[JB21]

You'd be better selling the Bilsteins and purchasing something like BC racing coilovers, instead of buying new springs and having them revalved. Second hand billes go for good money, so you wouldn't lose to much.

 

[3d3dman]

Agreed

 

[3d3dman]

What would secondhand b14's fetch money wise

 

[JB21]

Bet you'd get near £500 if they've only just been fitted.