I'm not sure whether this is the first step in trying to fix the vibration that occurs in some cars but i had my rear rotors machined (was told that it's bizarre that they needed to be machined) and it fixed the vibration for me! it usually occurred at 90+ km/hr and the bloke who machined them said they sometimes get slightly warped and will cause the vibration. Hopefully what I experienced and what's listed in this other forum will help someone out. http://www.300zxtt.co.uk/propvibes.htm
Good info Matt, but if you had used SEARCH on this forum, you would have found countless references to getting brake discs machined to help eliminate vibration. No need to look elsewhere.:zlove:
If it is just your rear rotors I suspect it is due to doing left foot braking burnouts. YOu might want to check on their thickness, and that of the pads.
The info has been refreshed I did a quick search on "brake vibration" and "rotors machined" but nothing was like what I described. O well least the info will be more recent for future searches. Thanks for the info on the left brake burnouts but I dont do them so not sure how long the rotors had groves (bought first z recently) if there is any constructive criticism on the way I posted feel free to pm me (first time posting in tech)
Matt. You posting is fine. Whilst the search function is a good tool to prevent comments I have no trouble answering if I have the time, or prove a link to the search tool if I don't. Chilli's just trying to help you. Anyway, if you take a photo of your rotor I'm can let you know. The desciption of the deep grooves doesn't support the notion it was not abused. Can I suggest that you check the thickness of the rear rotors to ensure that they are not under size. The guy machining them it is right that they are need machining as the mostllikely cause of warping cames from over heating, especially if the car is then stopped and allowed to cool. The wheels should be turned regulary if the brakes get that hot, to prevent inconsistent cooling where the pads are. How hot do they get doing these sort of burn outs, well check this youtube video. You will see a the end that this tool stops to cheer with his fellow apes, but the brakes are clearly red hot. I sure you understand that the area of the disk exposed will cool quicker that behind the calipers/pads as shuch this shrinks quicker and in turn pulls the disc out of alignment. Truth be known these disks will be stuffed, there will be cracks forming everywhere. Oh and also your wheel bearings might need to be checked as the heat soak can cause damage to tthe bearings or the grease to burn or leak out. Another issue with burn outs is the load that is placed on the engine, and lack of air flow. This increases the chances of over heating, noting you zed is new for you, please ensure you check your coolant system and engine's oil condition. Or, literally give it a once over. Maybe one of the qld locals that are knowledge might be able to help.
Thanks dieseldave Thanks for the wealth of knowledge but it doesn't really apply to my z (the rotors aren't cracked or thin) I gave it a major service (been 10 years so I wanted to be safer than sorry) while the rotors were machined and she's banging like a champion spark plug. Bought my aus spec 1990 with only 160k's, really clean and I suspect it's the 300th cause the Vin stock number says jn10rgz32a0000300
