who knows brakes???

[blusylver]

currently I a set of calipers with 4 28mm (112mm total) pistons and I can get a set of e36 front calipers which are 2 54mm (108mm total) piston. Im thinking about using the 4 pots upfront and the 2 pots on the rear. im not worried about mounting brackets because Ill fab some up. im using a full wildwood setup, and my masters are currently 1" for the fron and 3/4 for the rear. I have not ran brake lines as of yet due to not knowing which size line/MC im going to use.

the car has 600+ rwhp so I need it to stop. what front/rear ratio is best? what size MC should I use(I don't have a booster)?what size lines is best? I have done a fair amount of research and im just as confused now as I was before I started researching.


btw no abs either

[Danny]

I've heard of them. Don't think I've ever seen them though.

[blusylver]

lol, I was like wtf is he talking about.

[berlow94]

I'm happy with -3AN stainless or 3/16" line in my track car. What is your pedal to master cylinder reduction ratio? What kind of pads are you using? (What friction coefficient) How many pounds of force do you want to have to put on your brake pedal for threshold braking? Caliper brackets are one thing, but without hats how are you going to get rotors to fit the different size calipers.
When you say full wildwood setup are you talking about a Wilwood pedal box? I
'm about to convert my car to a dual master cylinder setup. No ABS Wilwood SL6 calipers up front and SL4's in the rear. Calipers are on radial mount brackets and rotors are on aluminum hats. Rotors are 11.75" X 1.25" 8-bolt HD slotted Wilwood rotors. You also have to think about some sort of e-brake for the rear.


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[berlow94]

On another note. BMW calipers use ISO bubble flare. Wilwood stuff is all 1/8" NPT. Another thing to take into account for the lines


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[blusylver]

[QUOTE=berlow94;4098247]I'm happy with -3AN stainless or 3/16" line in my track car. are you using that front and back. I have read that a lot of people use different size lines to get different volumeWhat is your pedal to master cylinder reduction ratio? im not sure, I believe it is 6:1. ill verifyWhat kind of pads are you using? (What friction coefficient) im worried about one thing at a time, pads will be after they are mounted and plummed. How many pounds of force do you want to have to put on your brake pedal for threshold braking? [COLOR="DarkRed"]I don't know, I want a stiff pedal. i have read that most people like it from 65-75lbs/COLOR]Caliper brackets are one thing, but without hats how are you going to get rotors to fit the different size calipers.
When you say full wildwood setup are you talking about a Wilwood pedal box?ya I
'm about to convert my car to a dual master cylinder setup. No ABS Wilwood SL6 calipers up front and SL4's in the rear. Calipers are on radial mount brackets and rotors are on aluminum hats. Rotors are 11.75" X 1.25" 8-bolt HD slotted Wilwood rotors. You also have to think about some sort of e-brake for the rear.


i don't need no stinken e brake, just put it in gear

thank you for the reply

[berlow94]

I would recommend same size line all around and then adjust your brake feel with master cylinder size, caliper size, bias bar, and pads with a different friction coefficient.
I hear ya about the e-brake, but god forbid something fails in your brake system, it's nice to have. Whenever I buy a new car one of the first things I do is all new e-brake lines and hardware.
Honestly the size of the brake lines shouldn't have any effect on pedal feel I don't think. Just changes the overall volume of the system. The brake feel is determined by the ratio of of fluid pushed at the MC to the fluid pushed into the calipers. The amount of fluid in between them shouldn't have any effect. Other then maybe a higher fluid boiling point.

Just curious what's your 600hp setup?


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[blusylver]

i have a built procharged ls6.

after looking into e36 325is calipers, i think im just going to go mazda rx7 all the way around. what ratio is the norm? i have yet to see someone state what they are doing, is it 60/40 70/30??