Thread: B4 tweaks
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Old 13-07-2009
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AlisdairO AlisdairO is offline
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Default B4 tweaks

Hiya,

I'm looking for some advice setting up my B4. I've got it mostly dialled in how I'd like it, so I'm looking at relatively minor tweaks. As it stands, I have a little bit of traction rolling, and the car bottoms out on the biggest jump. The car could also be a bit more stable going down the main straight, but that's not my biggest concern.

The track I'm racing at is high grip astroturf, with a surface that isn't all that smooth. Roughly equal mixture of high speed corners and tight hairpins, and two jumps of any significance.

I've been looking at these options, and since some of them take a while to make I thought I'd ask you guys first :

Stiffen up the rear: reduce traction rolling, and should sort out the jump handling. Unfortunately, the track is not smooth, and I'm reluctant to give up the consistent handling I get from the current shock setup.

Stiffen up the front: bit of a non-starter - would reduce my steering to give me less traction rolling, but I don't want to lose that. If anything I could handle a little more, although it's pretty good as-is.

Reduced down travel on the rear: should sort out the traction roll, but I understand my bottoming out problem would get worse. At the moment it's unpleasant but just about controllable - how much worse would this make it?

Reduced ride height: lower the centre of gravity a bit, which should help.

Add a bit of anti squat - I'm told this can improve the bump handling a bit, and reduce side bite, both of which should help. That said, the grip rolling happens mostly during a the early-mid portion of the corner where I'm not on the power, so I'm not sure how much it would help.

Move the upper shock mounting more vertical. Currently I'm on the middle hole, but this could reduce side bite and improve jumping a little. Would I need to alter my springs as a result of this change?
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