Tip of the day
Discussion
I spent an awesome day yesterday at Keevil airfield. The morning started off VERY wet but dried up in the afternoon. The dry weather seems to have increased the G-force on the nearside rear enough to cause a bolt to shear off the hub! I was obviously trying hard enough. :)
I have learnt a good lesson. Remember to check your wheelnuts before a track day, especially if you have had a new wheel fitted recently! :o
I have learnt a good lesson. Remember to check your wheelnuts before a track day, especially if you have had a new wheel fitted recently! :o
Absolutly - and for the paranoid amongst us, take the wheel off and check that the red "marker paint" is still lined up between the hub nut and axle itself. The rears, especially on early cars, have been known to slacken off.
I always carry around by 60-300Nm torque wrench and the appropiate sockets on track days.
www.halfords.com/opd_product_details.asp?id=16588&type=0&cat=71 is what I have
J
I always carry around by 60-300Nm torque wrench and the appropiate sockets on track days.
www.halfords.com/opd_product_details.asp?id=16588&type=0&cat=71 is what I have
J
It does help if you have two other hands when you are examining your nuts, if only to hold onto the wrench whilst you do a visual inspection. 
worty said:
Was the problem your nuts were too tight or too loose I know both can be a problem
My nuts were fine thanks! The chances are that the wheels nuts were loose, but I don't know, cos I didn't check them!
The wheel in question was new and I have now been told that the paint on new wheels can compress which can then cause some play in the nuts.
Are there any other track day tips out there?
worty said:
Are there any other track day tips out there?
Try and stay on the black bits
1) If you have the standard steering wheel, buy some racing/driving gloves. The carbon bit gets very slippy when your hands get moist as mine do on track or hairy B roads!!
2) Oh, and get a piece of kitchen paper and fold it into a strip about 2 cm x 1 cm then use electricat tape to fix it onto the black fluid resevoir behind the drivers side next to the rear wheel. (others might know what it is) as it tends to spit out fluid on high G corners.
3) Get ready to realise just how bloody fast a Noble is compared to (in my case) an Elise or 2 which I used to own and think was fast!!
4) Thke deep heat to rub into your cheeks as you will have been grinning so much that they hert!!
5) ENJOY
GN
The black fluid container is the power steering fluid, and the problem is that high g changes cause the fluid to come out of the breather pipe.
As you say, duct tape warapped around the top half with kitchen roll makes an effective 'catch', or you can do what I do which is just bung up the hole each track day.
J
As you say, duct tape warapped around the top half with kitchen roll makes an effective 'catch', or you can do what I do which is just bung up the hole each track day.
J
joust said:
I have excatly the same... although it's tricky to find a deep enough socket - from Halfords came from somewhere else eventually. Oh - having said that - I think you can't get the hub nut tight enough with this wrench - the nuts do wear out and stop locking always a good idea to use tread lock on them as well...
>> Edited by gizard on Friday 26th August 09:52
>> Edited by gizard on Friday 26th August 09:59
gizard said:I got the 32mm(???) socket for the hub nut from Halfords at the same time.
I have excatly the same... although it's tricky to find a deep enough socket - from Halfords came from somewhere else eventually.
gizard said:Spec is 270Nm and that goes up to 300Nm. Once it starts slacking off you should get it changed with a good dose of loctite blue or better (the ones that set and require heat to get them off) as it seems that once it's loose it will always work loose.
Oh - having said that - I think you can't get the hub nut tight enough with this wrench - the nuts do wear out and stop locking always a good idea to use tread lock on them as well...
J
Slightly off topic perhaps but with all this talk about torque wrenches it's worth noting the larges inaccuracies that you can get with the mechnical torque wrench ... www.surebolt.com/NDT-NDE-EMAT-Ultrasonics.htm gives you the sort of idea.
Many years ago I used to work a company that sold ultrasonic torque wrenches. These gizmos measured how much the bolt actually stretched and provided a more accurate measurement. I think they were sold them to people working on nuclear power stations, so probably not that applicable to us!
--
Richard
Many years ago I used to work a company that sold ultrasonic torque wrenches. These gizmos measured how much the bolt actually stretched and provided a more accurate measurement. I think they were sold them to people working on nuclear power stations, so probably not that applicable to us!
--
Richard
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