zakeri88 Posted April 5, 2015 Share Posted April 5, 2015 Hi guys, I've noticed a lot today that under heavy braking my Z tries to swerve. I can feel the wheel trying to turn and it feels like the balance is shifting back and fourth between the tyres and I'm having to fight to keep in straight. This is only under heavy braking mind. I upgraded the brakes about 4 months ago to EBC grooved discs + yellow stuff pads - they have a lot of stopping power to them. I'm wondering are the brakes too powerful for the tyres? In other words, are the tyres struggling to grip to the extent that the brakes can stop? The tyres are Avon Z225s and they've got about 3-4mm of thread depth left. Or maybe its an alignment issue? Thanks Quote Link to comment Share on other sites More sharing options...
Ekona Posted April 5, 2015 Share Posted April 5, 2015 I'd check the wheel nuts were tight, first off. More likely to be a sticky caliper than anything wrong with the tyres. Could be alignment, but very unlikely. What happens when you brake hard with no hands on the wheel? Quote Link to comment Share on other sites More sharing options...
Commander Posted April 5, 2015 Share Posted April 5, 2015 That's not normal. Check; Wheel nuts are done up Tyre pressures are ok, and symmetrical Play in bushes, beatings and ball joints Sticky brake pistons Do this on all 4 corners of the car, not just the fronts. Quote Link to comment Share on other sites More sharing options...
Bodyboarder81 Posted April 5, 2015 Share Posted April 5, 2015 And also if you've bled the fluid .... Could be air in the system , mine done this after not being bled properly , was quite scary to be honest ! Quote Link to comment Share on other sites More sharing options...
BulletMagnet Posted April 5, 2015 Share Posted April 5, 2015 Were the new discs and pads bedded in properly? Quote Link to comment Share on other sites More sharing options...
zakeri88 Posted April 5, 2015 Author Share Posted April 5, 2015 Okay, I've checked the nuts and the tyre pressure. Both are good. Yes I bedded in the braked properly. Bodyboarder, I think you're right. I'm going to book in a brake bleed and alignment just to be on the safe side. Hope its not the brake pistons... Quote Link to comment Share on other sites More sharing options...
zakeri88 Posted April 5, 2015 Author Share Posted April 5, 2015 Oh and I haven't tried braking hard without my hands on the wheel but I imagine it wouldn't end well. Quote Link to comment Share on other sites More sharing options...
nissanman312 Posted April 5, 2015 Share Posted April 5, 2015 mine dose the same fro 140 Quote Link to comment Share on other sites More sharing options...
Ekona Posted April 5, 2015 Share Posted April 5, 2015 Oh and I haven't tried braking hard without my hands on the wheel but I imagine it wouldn't end well. Don't do it from speed, 30 is fine, it'll just let you know where the issue is on the car. Quote Link to comment Share on other sites More sharing options...
zakeri88 Posted April 6, 2015 Author Share Posted April 6, 2015 I tried it at low speed and it doesn't seem to happen. Tried it around 60 and it pulls very slightly to the left. I'm wondering does the road surface effect the braking? Because I noticed it very badly on an old B road. Quote Link to comment Share on other sites More sharing options...
brillomaster Posted April 6, 2015 Share Posted April 6, 2015 Try a nice smooth flat dual carriageway, that should negate the effect of road camber. Quote Link to comment Share on other sites More sharing options...
Spatt Posted April 21, 2015 Share Posted April 21, 2015 Mine does this.. its going on the ramp this weekend so good time to check over all the suspension parts Quote Link to comment Share on other sites More sharing options...
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