brakes Will An E46 M3 Brake Master Work For Me?

[DaveBMX]

Hi guys running volvos on the front and trying to sort out the MC. My car is RHD and has dual boosters. i cant afford an e9, e12 MC so looking at others

 

found these

 

http://www.ebay.co.uk/itm/BMW-E46-3-SERIES-318i-2003-FACE-LIFT-MASTER-BRAKE-CYLINDER-03-3508-8478-1-B232-/271200691921?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item3f24d226d1

 

looks ideal for fitment but cant find a bore spec however it is for a vastly larger car than the 02

 

*edit appears to be 22.20 mm

 

 

and thee 46 m3

 

http://www.ebay.co.uk/itm/BMW-E46-M3-BRAKE-SERVO-AND-MASTER-CYCLINDER-34-33-2228986-/360746473328?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Plat_Gen%3AE46%7CCars+Type%3AM3+3.2&hash=item53fe2a5770

 

i would of course chuck the booster.

 

specs are 25mm bore for front brakes and 20mm for rears.

 

would this make the car seriously biased to the front until i upgrade to rear disks?

 

*edit found that the e36 m3 cylinder is the same shape however is 25mm throughout but again are quite expensive

 

 

 

regards

 

 

Dave

Edited October 22, 2013 by DaveBMX

[M3M3M3]

80's 750i MC is 25mm front and rear and fits perfectly.  25mm is a bit big for 2002 stock or "volvo" configurations.  will result in a pedal that is way too hard.  i run it in my car, but i have bigger wilwood calipers all around.

[DaveBMX]

Thanks mlytle will see how much they go for on ebay. Im finding it difficult to find a mc bigger than the stock 22mm in the uk thats not expensive.

Regards

Dave

[73touring]

The Standard RHD master Cylinder is plenty for the setup you decribe  and the reality is if you were to go for a boosterless system you really want a smaller master cylinder, Ive beeing toying with something simular using a volvo 240 brake junction box and the volvo 15mm master to decrease the pedal effort if I go down that route.

[DaveBMX]

Thanks 73touring i didnt know that! From other sources its always seemed that for bigger brakes i need a big cylinder. If i can find my original cylinder i might give it a try

Dave

[TobyB]

Start with your original.  It will work.

 

If you hate it, THEN it's time to try something different.

 

But I wouldn't recommend a stepped master unless you do the math for it...

 

t

[DaveBMX]

Hey thanks Toby i found my original MC so will do exactly like you said!

 

 

regards

 

Dave

[M3M3M3]

Start with your original.  It will work.

 

If you hate it, THEN it's time to try something different.

 

But I wouldn't recommend a stepped master unless you do the math for it...

 

t

agree.  as i mentioned, bigger cyl dia will mean more force to push pedal.

[DaveBMX]

makes sense as you need more force to push the greater volume of fluid through in the same time period. Will stick on the original and let you know how it works.

 

 

 

Dave

[DB]

I have been running big brakes with the standard master cylinder and it was fine. The only time I found any issues with it was when I ran a few track days when I would run the usual 5-6 laps then I'd line up straight away for the next group (that way you'd get a few extra sessions in the day )  Even then with hot brakes it was only a little extra travel. Never a problem.

[73touring]

If your own master cylinder is leaky a pug 405 master cylinder is a good option apperently