Threeleggedman 3rd Gear July 11, 2011 Share July 11, 2011 Hi All,I am on 4-pot BBK for 2mths plus. Over the past 2 weeks, whenever I brake normally at high speed around 90km/h, I feel a strong plusating vibration to the steering wheel. The mechanic says that's the ABS kicking in due to the pressure from the BBK. The same does not happen at normal speeds below 70km/h.Is this normal? Or is it my tyres that are not grippy enough? They are at 7000kms and 1yr old.How can I solve the issue?Thanks ↡ Advertisement Link to post Share on other sites More sharing options...
Ohlins Neutral Newbie July 11, 2011 Share July 11, 2011 i think you have problems with your rotors.... read this for more info... stoptech Link to post Share on other sites More sharing options...
Driver57 Neutral Newbie July 11, 2011 Share July 11, 2011 A few things to check . . . 1. I would suspect the rotors are warpped . . . . if they are used ones. 2. Another thing to look out for is if the rotor and hats are fastened properly. 3. The caliper brackets are fastened properly. 4. The rims are hubcentric correct. Link to post Share on other sites More sharing options...
Driver57 Neutral Newbie July 11, 2011 Share July 11, 2011 On 7/11/2011 at 4:21 PM, Threeleggedman said: Hi All, The mechanic says that's the ABS kicking in due to the pressure from the BBK. Thanks This is a big load of bull . . . . . . unless the road is wet, very wet . . . . . and you're stampped on the brakes. Link to post Share on other sites More sharing options...
Threeleggedman 3rd Gear July 11, 2011 Author Share July 11, 2011 On 7/11/2011 at 5:12 PM, Driver57 said: A few things to check . . . 1. I would suspect the rotors are warpped . . . . if they are used ones. 2. Another thing to look out for is if the rotor and hats are fastened properly. 3. The caliper brackets are fastened properly. 4. The rims are hubcentric correct. Rotors are new. I'll check the rest. Didn't have this problem when I got the set 2 mths ago. Strange. Link to post Share on other sites More sharing options...
Threeleggedman 3rd Gear July 11, 2011 Author Share July 11, 2011 On 7/11/2011 at 5:15 PM, Driver57 said: This is a big load of bull . . . . . . unless the road is wet, very wet . . . . . and you're stampped on the brakes. Is it possible on dry road with tyres that dun grip well under normal braking? Link to post Share on other sites More sharing options...
Driver57 Neutral Newbie July 11, 2011 Share July 11, 2011 On 7/11/2011 at 5:31 PM, Threeleggedman said: Is it possible on dry road with tyres that dun grip well under normal braking? Unless you really slammed on the brakes and one of the wheels is trying to lockup. Maybe you want to goggle and understand how ABS works. Link to post Share on other sites More sharing options...
Rb26dett Clutched July 11, 2011 Share July 11, 2011 most likely rotors warped. refrain from washing your rims or brakes after long hours or driving during dry weather. another possibility , did you change your rear brakes as well? if not maybe you can try upgrading your rear brakes as well so under hard braking , your car "sits" instead of diving forward. the abs thingy is b-------t.i've used brakes up to 10 pot before and no such issue. Link to post Share on other sites More sharing options...
Threeleggedman 3rd Gear July 12, 2011 Author Share July 12, 2011 10 pot! Wow.. Ok I will ask the mech to check. Other forums oso concur that it can't be abs. I din face any problem until now Link to post Share on other sites More sharing options...
Hamburger Hypersonic July 12, 2011 Share July 12, 2011 its warped and most importantly........tell your mech to fly kite. Link to post Share on other sites More sharing options...
Ooosh 1st Gear July 12, 2011 Share July 12, 2011 (edited) i think what you are experiencing is when you brake it is quite noisy as the pistons are working its way on the rotors and there is a very slight vibration on the BBK.......this is normal as the energy has to go somewhere with the strong clamping. The only time i feel it to be different is when i brake really hard due to red light or car cut in and the ABS kicks in......this you feel the difference as it feels like a tree branch has gone into the rotors... Edited July 12, 2011 by Ooosh Link to post Share on other sites More sharing options...
Threeleggedman 3rd Gear July 12, 2011 Author Share July 12, 2011 On 7/12/2011 at 2:39 AM, Ooosh said: i think what you are experiencing is when you brake it is quite noisy as the pistons are working its way on the rotors and there is a very slight vibration on the BBK.......this is normal as the energy has to go somewhere with the strong clamping. The only time i feel it to be different is when i brake really hard due to red light or car cut in and the ABS kicks in......this you feel the difference as it feels like a tree branch has gone into the rotors... It's a strong pulsating effect. The steering wheel gets unsteady. I have stopped driving my car until I get it fixed. Sought a second opinion and confirmed rotor warped. Now waiting for a replacement set. Link to post Share on other sites More sharing options...
Driver57 Neutral Newbie July 12, 2011 Share July 12, 2011 On 7/12/2011 at 4:31 PM, Threeleggedman said: It's a strong pulsating effect. The steering wheel gets unsteady. I have stopped driving my car until I get it fixed. Sought a second opinion and confirmed rotor warped. Now waiting for a replacement set. If rotors are new from 2 months ago, a cheap fix will be skimming them. BTW what BBK and rotors are you using ? Link to post Share on other sites More sharing options...
Vtim 3rd Gear July 12, 2011 Share July 12, 2011 On 7/11/2011 at 4:21 PM, Threeleggedman said: Hi All, I am on 4-pot BBK for 2mths plus. Over the past 2 weeks, whenever I brake normally at high speed around 90km/h, I feel a strong plusating vibration to the steering wheel. The mechanic says that's the ABS kicking in due to the pressure from the BBK. The same does not happen at normal speeds below 70km/h. Is this normal? Or is it my tyres that are not grippy enough? They are at 7000kms and 1yr old. How can I solve the issue? Thanks Don't think it's ABS kicking in, did you install slotted rotors? I suspect the rotor may be warp. Link to post Share on other sites More sharing options...
Clrex Neutral Newbie July 13, 2011 Share July 13, 2011 Beside the steering wheel, did you also feel it from the brake pedal? It kind of grinding feel and you can also hear it, if it just vibration on the steering wheels, possibilities are like what bros here had said its due to warped rotor. It could be the also pad warped or wear off, wheel bearings and lyres. Link to post Share on other sites More sharing options...
Aeromania 1st Gear July 13, 2011 Share July 13, 2011 On 7/11/2011 at 5:29 PM, Threeleggedman said: Rotors are new. I'll check the rest. Didn't have this problem when I got the set 2 mths ago. Strange. Rotor not warped 2 months ago and now different leh. Maybe u do too many excessive brakings also can warp the rotor one leh. Link to post Share on other sites More sharing options...
Larlee Neutral Newbie July 13, 2011 Share July 13, 2011 2 months only and rotor wrap? a little too fast and something is wrong, can't expect to keep changing rotor every 2 months right? Link to post Share on other sites More sharing options...
Threeleggedman 3rd Gear July 16, 2011 Author Share July 16, 2011 On 7/12/2011 at 8:53 PM, Vtim said: Don't think it's ABS kicking in, did you install slotted rotors? I suspect the rotor may be warp. Yup. Slotted rotors ↡ Advertisement Link to post Share on other sites More sharing options...
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