UK Karting - Notice Board (General Karting) : Re: New brake seals and now really stiff

Notice Board (General Karting)

Re: New brake seals and now really stiff
Posted by 'Mart247' on 16 Jul 2014 @ 15:17

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Mart247Joined: August 2012
Total Posts: 6
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As it was explained/sold to me by the oil company who supplied the lubricants for the factory bike race team back in the day;
DOT 5 (silicone) is better in terms of paintwork damage (important on bikes given the amount of painted plastic on them & any accident normally ripped a reservoir off so it went everywhere !
It has a lower boiling point V�s DOT 3-4 but also as correctly stated above wasn�t as good in compressibility terms, quite important at the extremes of performance !
However it didn't absorb water as quickly over time in service (not relevant to anything race wise) but more importantly in a race situation when it did 'boil' it didn't degrade as quickly. DOT 4 boils at x degrees, but as it re-absorbs the moisture it then means it degrades again therefore will boil again at say half x degrees, and so on, hence it gets worse rapidly in a race/day.
DOT 5 has a much slower degrade after overheating or through natural moisture absorption.
The seal swelling is certainly true with different DOT�s.
Most new volume selling cars run DOT 4 because .. it�s cheaper and more easily available to us owners for home maintenance. Working for a vehicle manufacturer I can assure you that�s the case.
Given it seems the original problem has been solved, which was the reason for posting, maybe not too relevant but all adds to the knowledge base for a paddock bar debate !

Message Thread:

New brake seals and now really stiff by 'nichop' (15 Jul 2014 @ 23:25)

Re: New brake seals and now really stiff by 'nilocshooting' (16 Jul 2014 @ 9:01)

Re: New brake seals and now really stiff by 'd-i-y71' (16 Jul 2014 @ 10:30)

Re: New brake seals and now really stiff by 'nilocshooting' (16 Jul 2014 @ 11:42)

Re: New brake seals and now really stiff by 'd-i-y71' (16 Jul 2014 @ 13:29)

Re: New brake seals and now really stiff by 'davidmc' (16 Jul 2014 @ 13:39)

Re: New brake seals and now really stiff by 'faster' (16 Jul 2014 @ 13:57)

Re: New brake seals and now really stiff by 'davidmc' (16 Jul 2014 @ 14:35)

Re: New brake seals and now really stiff by 'Mart247' << You are here!

Re: New brake seals and now really stiff by 'nichop' (16 Jul 2014 @ 18:14)

Re: New brake seals and now really stiff by 'bt3962' (17 Jul 2014 @ 3:15)

Re: New brake seals and now really stiff by 'iant' (17 Jul 2014 @ 19:14)

Re: New brake seals and now really stiff by 'nichop' (17 Jul 2014 @ 22:17)

Re: New brake seals and now really stiff by 'iant' (17 Jul 2014 @ 23:14)

Re: New brake seals and now really stiff by 'Ditch' (18 Jul 2014 @ 0:47)

Re: New brake seals and now really stiff by 'CharlieCadet' (18 Jul 2014 @ 10:10)

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