B4 hooking on carpet

[stuey]

Hi, I am having a problem with my B4 hooking on a small high grip carpet track. It looks like the front is rolling too much, and the inside rear wheel is lifting up leading to a hook into corners. I am using half worn yellow minipins with the following setup. I got to this after going from 35 to 45wt oil on the front.
Front: 45wt
Piston 2 Blue spring
Shock inner on tower outer wishbone Link 1A, 1 washer under balljoint
30 deg caster blocks
Rear: 30wt
Piston 1 Silver spring 1 washer inside
Shock inner on tower outer wishbone Link 1B, 1 washer under balljoint
Short wheelbase 1 deg anti squat, 35g lead in rear of car on NiMh cells
Cells split in middle position.
It did improve slightly after going up on the front oil, but I think either I need a geometry change or soften the rear roll to make it more even with the front.
Thanks for any advice

[sosidge]

Your setup is pretty close to mine (which I have uploaded here), and my setup is very consistent on the local small, high grip indoor track.

The only thing I'm wondering about is ride height. Are you running the car low to the ground? Because anything less than front arms level (or a fraction below) will make the front of the car very soft in roll. I run the rear at bones level.

[stuey]

I have the front wishbones just below level, same with driveshafts on the rear.

[sparrow.2]

What tyres are you running?

Minipins on the front are totally overkill 99% of the time in my opinion. Stagger ribs on the front with a silver spring no.2 piston, 35weight oil works nicely with the shocks on the middly hole on the tower and outside on the wishbone. 30° caster blocks can bite you in the arse if running pins. Back end sounds ok but I usually run grey associated springs.

Front pins will hook on carpet no matter what you do with the setup. (yes, I really don't like pins ) Staggers have a little less grip and you have to run different setups but are so much smoother and quicker in the long run.

But then european setups and british setups are usually miles apart

To get the staggers on the front rims nicely cut about 1mm off the bead of the tyre then seat the cut bit in the outside groove on the rim. Then glue the outside and just leave the inside unglued and seated one row in from the inside of the rim.

[stuey]

Yellow minipins, with the outside row cut off. I should probably cut the fronts down more, and on the inside.

[spiro]

My setup for high-grip carpet is about the same as the others stated in this tread, with the front arms-level and the rear shaft-level. Most setup is standard FT setup from the manual, but with heavier oils. My setup is 650 front and 550 rear. (CPS) Blue springs front and silver rear. This makes the car a bit to soft in the back, so I'll change to stiffer springs next trackday. I run the schumi minispikes front and back, with spikes completely cut off.

Oh, and the gold anti-roll bar.

Works well.

-S-

[steelie600]

Im using Craggy's Astro setup for southport to the letter, also on high grip carpet. But we have to use control tyres. Proline Dirt Hawgs. Ive got mucho grip infact if i try i can get grip roll but, drive smooth and its perfectly fine and very hard to get symptoms your describing.

[super__dan]

Originally Posted by stuey

Hi, I am having a problem with my B4 hooking on a small high grip carpet track.

Cough* servo saver *cough

Apologies to all the people that think I sound like a broken record

[stuey]

The servo saver has always been glued, it is soild. I wish it was that easy!