Gman Posted October 30, 2016 Author Report Share Posted October 30, 2016 Ok will do this thanks for advice . Quote Link to comment Share on other sites More sharing options...
Gman Posted October 31, 2016 Author Report Share Posted October 31, 2016 Another thing that Ive noticed is these tyres are noisy... A lot louder then the budgets they replaced. I'm slightly disappointed by the noise levels to be honest. Quote Link to comment Share on other sites More sharing options...
Tony Posted October 31, 2016 Report Share Posted October 31, 2016 There should have been a performance sticker on the tyre highlighting the DB...... Nothing can be done to reduce the harmonics since it's the tread configuration that does it. Quote Link to comment Share on other sites More sharing options...
Gman Posted October 31, 2016 Author Report Share Posted October 31, 2016 Yes 71db . Quote Link to comment Share on other sites More sharing options...
Tony Posted October 31, 2016 Report Share Posted October 31, 2016 Did the tone change with the tyre pressures? Quote Link to comment Share on other sites More sharing options...
Gman Posted October 31, 2016 Author Report Share Posted October 31, 2016 Never really thought about it .. but yes I think they got louder/ difference tone with more pressure.. Quote Link to comment Share on other sites More sharing options...
Tony Posted November 1, 2016 Report Share Posted November 1, 2016 Then you're stuffed  The reason i asked if the harmonics changed was to see if the sound was a wheel bearing, Had it stayed the same then a bearing would have been a possibility. Quote Link to comment Share on other sites More sharing options...
Gman Posted November 1, 2016 Author Report Share Posted November 1, 2016 Pretty much thought that ... these tyres maybe going on the back.... great grip but not sure I can live with the noise. Going to swap the fronts first like you said will report back Thanks Quote Link to comment Share on other sites More sharing options...
Tony Posted November 2, 2016 Report Share Posted November 2, 2016 In truth the shop should have warned you they were noisy. Quote Link to comment Share on other sites More sharing options...
Rich Posted November 2, 2016 Report Share Posted November 2, 2016 They're only 1db lower than the Hankook's we have on the Lexus and I don't think they're noisy at all. 1db can't make that much difference so maybe the car isn't as well insulated, which means they can be heard more? Quote Link to comment Share on other sites More sharing options...
Tony Posted November 2, 2016 Report Share Posted November 2, 2016 Seemingly 1DB is enough, saying the DB's on some high end cars tyres is more than that without complaint. Quote Link to comment Share on other sites More sharing options...
Gman Posted November 3, 2016 Author Report Share Posted November 3, 2016 Yes I agree .. which is why I still think it's odd can't understand why they would be this noisy..  Just to clarify when I posted my front toe figures it may have looked like it was negative when in fact it was wasn't ... not sure if this makes a difference.  0.6mm Left 0.6mm right Total 1.2mm  I assume this is still ok and within spec .. to be fair the car tracks straight on the motorway . Quote Link to comment Share on other sites More sharing options...
Tony Posted November 3, 2016 Report Share Posted November 3, 2016 They should be negative..... At the moment the static 1.2mm becomes about a dynamic 2.4mm. Reason the static toe is negative is because of the drive. The bushings load dynamically hence the reason a FWD has a static negative. Quote Link to comment Share on other sites More sharing options...
Gman Posted November 3, 2016 Author Report Share Posted November 3, 2016 That's what I thought... so why was the garage telling me it's ok and within factory spec... ? Not sure where to go from here... can I adjust the toe to negative and if so how much? Cheers Quote Link to comment Share on other sites More sharing options...
Tony Posted November 3, 2016 Report Share Posted November 3, 2016 The same negative as it is positive... Tolerances are misleading because they are the dynamic gains and loss of that angle during the suspension bump and droop so it's preferred position is the middle of the tolerance. Quote Link to comment Share on other sites More sharing options...
Gman Posted November 3, 2016 Author Report Share Posted November 3, 2016 So if run 0.6mm negative both sides (toe out) I should have total - 1.2mm negative. In which case the front wheels will pull themselfs in resulting in a more middle position.. correct ? Quote Link to comment Share on other sites More sharing options...
Tony Posted November 3, 2016 Report Share Posted November 3, 2016 Spot on...... One we take any angles position we can then change toe or camber or whatever to alter the tyres grip limits. Hows this for an example, a car fully fitted with hardened bushings like Poll's needs zero toe because there's no compliance in the bushings. Quote Link to comment Share on other sites More sharing options...
Gman Posted November 3, 2016 Author Report Share Posted November 3, 2016 Cheers , yeah that makes sense. Really surprises me the amount of tyre/ wheel alignment center's that don't have a clue ... I will get the car on a ramp and dail in negative 0.6mm should help with turn in and general feel. Quote Link to comment Share on other sites More sharing options...
Tony Posted November 4, 2016 Report Share Posted November 4, 2016 As an instructor i trained instructors for some of the biggest tyre companies in the UK and i'm scared to say their knowledge in even basic chassis calibration is worrying since their understanding is what gets past onto the guys on the floor. The real problem is wheels alignment/ geometry isn't regulated which is odd given the consequences if done incorrectly. Quote Link to comment Share on other sites More sharing options...
Gman Posted November 4, 2016 Author Report Share Posted November 4, 2016 Yeah it's pot luck out there when it comes to alignment!!! Shame your so far away from me .. Front wheels swapped over this morning.. not driven the car enough yet to tell any difference. Spoke to my local garage about adjusting the toe and even the bloke in their was unsure about toe out / in and how it effects the front wheels when under load !!  I was assuming that if I adjust the toe by same amount but negative (0.6mm) this would be fine and not effect anything else ? Bloke in the garage was saying it depends on the camber of the wheels ? 🙄 ... Quote Link to comment Share on other sites More sharing options...
Tony Posted November 4, 2016 Report Share Posted November 4, 2016 Rubbish.... Toe is longitudinal and camber vertical both hold their own forces during the suspensions transition. Toe is a compliance angle with a desire to be zero dynamically so -1.6mm static should = -0+ dynamically.. Quote Link to comment Share on other sites More sharing options...
Gman Posted November 4, 2016 Author Report Share Posted November 4, 2016 That's what I thought and im no expert .. just joe blokes off the street . Looks like I may need to take it somewhere else , though most place's seem to think I'm talking rubbish and they know better . Why can't they do as I ask or understand. Quote Link to comment Share on other sites More sharing options...
Tony Posted November 4, 2016 Report Share Posted November 4, 2016 Because they don't know themselves.... Be sure you get a full geometry which will include the castor so we get a full image of the chassis. Quote Link to comment Share on other sites More sharing options...
Rich Posted November 4, 2016 Report Share Posted November 4, 2016 The align my car website might help you find someone better -Â http://www.alignmycar.co.uk/ Quote Link to comment Share on other sites More sharing options...
Gman Posted November 4, 2016 Author Report Share Posted November 4, 2016 Thanks , though I'm losing faith in most places. Not sure if it would be better going into Ford main dealer ..? Quote Link to comment Share on other sites More sharing options...
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