BMW E36 Track day car - Best brake and suspension setup

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  1. BMW E36 Track day car - Best brake and suspension setup 
    #1
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    Hi Guys,

    On Friday i took part in my first proper track day, an open pit lane at the new snetterton circuit. It was fantastic and i cant wait to do another one, however it did bring up a few areas needing improvement on the 325i.

    I dont want to increase engine power (yet) but want to sort the bareks and suspension.

    The car is currently running stantard except redstuff brake pads and abs removed and stainless brake hose from master cylinder to each calipers. However the brakes began to wilt v quickly and better stoppping pwoer is needed.

    Will the 330 brake conversion be up to the job? Or do i need 4 or 6 piston type?

    Suspension wise the car has kw variant 2 coilovers on the front and and kw rear shocks with lowered springs and standard anti roll bars.
    What is recommened? Im thinking eiback anti roll bars and all 4 height adjustable coilovers?

    Any opinions are greatly recieved as i need to have this lot sorted by the first week of april for my next track day!

    Thanks


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    When you say stainless, do you mean braided covered rubber lines?

    What DOT fluid are you using?

    Fade comes from boiling fluid or glazed pads.

    So you have options:
    A) Make it live with the heat, higher DOT fluid and different pad material
    B) Stop it getting hot, bigger disks, calipers so same braking working less hard, improve cooling etc.


    However if braking from high speed to a stop then cooling hardley helps as all the heat build up is in a few seconds.


    Most upgrades comprise an assortment of the above


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    yes that is correct, not cheap


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    Quote Originally Posted by Lloydie123 View Post
    yes that is correct, not cheap

    Braided over rubber will expand more than rigid lines so if that is what you have long runs of I would expect that to make them less sharp.


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    Sorry i was incorrect in my last post, they are not rubber covered brake hoses. They are stainless braided with a tougned plastic inner iirc, but dont hold me to that. But i know for sure not rubber.

    I beilieve car is running dot 3 if that is normal road stuff, however the system will need draining and rebleeding so new fluid can be used, what do you recommend?

    The problem with overheating brakes was the rears seemed to almost catch alight? this may be down to sticking calipers though im not sure, however the rear pads and front ones as well have had it really.

    Would a e46 330 brake upgrade suffice or is something larger required?

    Mnay Thanks


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    It shouldn't be running DOT3, standard was DOT4.

    A good racing fluid will be DOT4 too, either ATE super blue or Motul RBF600.
    They will be better then most if not all DOT 5.1s
    You can mix 5.1 and 4 if needed, but in your case, I'd assume you have regular DOT4 so even less of a problem.

    The blue dye in ATE superblue will also let you know when you've bled it through.

    The 330 brake conversion should be fine, most 4 pot upgrades are for street bling rather than actual use. I'd class pads as the most important link (provided you have decent fluid) and more important than fancy discs.

    The key to good braking is brake hard, fast and quick, you'll be wanting to have either max braking or no braking for most circumstances.

    Most overheating of brakes come from smooth street braking into a corner at 50-60% of max for a gentle stop, which means riding the brakes for a while, and just heating them up.
     
     

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    Yes i think you are right, its most likely DOt 4 fluid.

    I will look into doing the 330 brake conversion asap, and i think red stuff pads will be in order.

    The problem with the rear brakes is that under hard braking they were locking on and required the fluid to be let out and the rear brakes blocked of to prevent them setting alight. Is this a sign of kanckered calipers? or soemthing else?

    Regarding the suspension, do you have any recomendations? At the minute the car has kw coilovers and rear shocks with some un branded rear springs. And standard anti roll bars.

    Are eibach anti roll bars a good upgrade to reduc the roll in corners?

    Thanks


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    eibach or whiteline should be pretty good, especially if they are the slightly adjustable ones.

    max stiff can make the car a bit skittish. You'll need to sort out what's going on with the rears though, check for damaged or crimped pipes. The rears don't do much braking at all compared with the fronts.

    Have a good look at the caliper pistons to make sure they are getting corroded but it does seem like a restriction so you can pump extra fluid in under pressure, but it won't relax under it's own steam.
     
     

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    Thanks again.

    I had read good reviews of both eibach and whitline, so i will be ordering front and rear set of them, and for good measure will replace the link bars as well.

    Hopefully this will reduce the roll into corners, as it was causing the car to feel slightly unstable. Will powerflex bushes be a worthwhile upgrade as well, i had a set on my 318is a while back and helped alot but do they hack track abuse?

    Are rear coilovers a good upgrade, i was looking at the gaz gold kit. the car has a full weld in cage which goes to the turrets and across them so i think the car can take them, but are they needed?

    Thanks

    Lloyd


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    If the rear turrets are reinforced, you could use true rear coilovers, but even the BMW race cars used a separate shock and spring.

    Don't order any roll bar link rods until you know what comes in the roll bar kit. They often include them, and they can be a different design and size.
     
     

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