fhalperformance
New member
Now you just gota do some stopping distance tests to see how it performs to stock. Sounds excellent
Custom front and rear big brake kit
- Thread starter gt4rcdude
- Start date
Denver_whiteST185
New member
Meurz":3u090u4z said:
Well, they are for stopping in a shorter distance since they apply more force over the same amount of time (unless you lock up the wheels), along with heat dissipation and other benefits. Tires and most abs systems DO make a big difference, but that’s kind of a moot point since those will make a difference to regular brakes and BBK's. Our ABS system is a different story, since i see it as junk. i found i could brake more actually and stop quicker with it disabled.
Meurz
New member
I hope you never have to do that in a REAL emergency situation cause you'll crash your car. I did many advanced driver courses, some with the CS, some on a skid pan, but no matter how much you train, you'll always react differently when you're on the road and you're actually heading into a big crash. Then you don't think, but stamp on the brakes, lock up, etc...Denver_whiteST185":3dibg26g said:
Well that's my view anyway.
Denver_whiteST185
New member
Meurz":1vedbynw said:I hope you never have to do that in a REAL emergency situation cause you'll crash your car. I did many advanced driver courses, some with the CS, some on a skid pan, but no matter how much you train, you'll always react differently when you're on the road and you're actually heading into a big crash. Then you don't think, but stamp on the brakes, lock up, etc...Denver_whiteST185":1vedbynw said:
Well that's my view anyway.
During the winter of 06-07, Denver had 4 major snow storms (the largest was well over 2.5 feet with up to 10 ft drifts, look at my gallery for a photo of my car buried) and had over 2 months of consecutive days with snow covering the roads since most side roads weren't plowed due to the amount of snow from the first big storm.
I drove my car all but one day during that. Given i did have some really meaty snow tires, and i drove within my means, but my ABS was deactivated the entire time. i found when i was braking hard, if my car felt the slightest bump it would activate the ABS and i would loose all of my pedal feel.
Now, newer cars with new ABS systems are extremely useful for more than just ice. I'm just saying that the stock ABS system on our car is in my opinion, garbage, wet or dry.
bozo-merlin
New member
Simba":qxqg7lxk said:
the calculation is right
single pot needs to move 2x in order to make contact on both side of the rotor whereas opposite pots on a 4 pots move only once each, that's why you could compare
single pot area x2 vs 4 pots total area, or simply single pot area vs 2 pot (on the same side) total area
floating caliper need to move twice to make contact on each side, that's what a trackday friend of mine explain me a long time ago, and that's really logic
fhalperformance
New member
Youre right about the tires but bigger brakes can cause any number of changes in stopping distance in good or bad ways. I can show you how you improved/hurt your braking abilities, and is the only real test I can think of for brake efficiency in a comparative way.
Denver_whiteST185
New member
Meurz":tt512grq said:Fair point, I agree with you regarding snow/ice. We don't have that over here that much (specially not on the roads)
On dry tarmac, I still think ABS can/will save you.
maybe something was up with my ABS, but on dry roads if i was braking hard and i hit even the smallest bump, it would activate and i would loose all my pedal until i let up and i reapplied the brakes.
bozo-merlin":1l241657 said:Simba":1l241657 said:
the calculation is right
single pot needs to move 2x in order to make contact on both side of the rotor whereas opposite pots on a 4 pots move only once each, that's why you could compare
single pot area x2 vs 4 pots total area, or simply single pot area vs 2 pot (on the same side) total area
floating caliper need to move twice to make contact on each side, that's what a trackday friend of mine explain me a long time ago, and that's really logic
Bingo.
I wish I had tested the OEM brake system with these new wheels and tires before I upgraded the brakes. It just worked out that I did it all at once. I was able to lock all wheels with the OEM setup, ABS disabled. The limiting factor was adhesion. I can tell you the new system is easier to modulate as I had to panic brake tonight. The stop was from 75mph. The brakes were consistently awe inspiring throughout the entire deceleration. AOL keyword consistent all the way down.
As a motorcyclist I'm used to threshold braking and I've had the ABS system interfere more than once. It's a crude system that may save your bacon in a panic, but it's no match for a 4 channel independent system. It has lengthened more than one stop.
The ABS almost cost me a fence post and a bumper the other day....
had my son in the car, goofing on my long gravel drive..
punched it in first, just as I started a corner, to get a good drift going to give my son a thrill...
We drifted the corner, but had to much speed coming out, and I started to brake, and the ABS on the rough loose gravel would not allow for any braking...
I stopped trusting/using the ABS at that point and tried to modulate myself, but kept getting the ABS interupt...
Stopped litteraly <----> this close to the fence post at my gate!!
Not cool...
Time to diable mine...
And BTW... I love this brake setup you have...
$$$ needed and I will do very similar....
had my son in the car, goofing on my long gravel drive..
punched it in first, just as I started a corner, to get a good drift going to give my son a thrill...
We drifted the corner, but had to much speed coming out, and I started to brake, and the ABS on the rough loose gravel would not allow for any braking...
I stopped trusting/using the ABS at that point and tried to modulate myself, but kept getting the ABS interupt...
Stopped litteraly <----> this close to the fence post at my gate!!
Not cool...
Time to diable mine...
And BTW... I love this brake setup you have...
$$$ needed and I will do very similar....
CMS-GT4":2a6rf5s1 said:
Front OEM caliper is 2.25" diameter for a total of 3.97 sq. in.
Wilwoods at 1.62" diameter X2 for a total of 4.12 sq. in. Part no#120-8465L & R
Rear OEM caliper is 1.37" diameter for a total of 1.47 sq. in.
Wilwoods at 1.00" diameter X2 for a total of 1.57 sq. in. Part no#120-9706
Updated the post!
bozo-merlin
New member
I don't remember ST205 piston size (i think it's 1.73") but with the front and rear 205 caliper on a 1" ABS version MC and no ABS i easily burn the tyres when brake half the pedal even on dry road.
The gt4rcdude choice is keeping the same piston area from stock in order for ABS to work near to standard
The gt4rcdude choice is keeping the same piston area from stock in order for ABS to work near to standard
You know.. the only thing we'd really need are the caliper brackets and the brake lines..
Any chance your buddy at the machine shop would be willing to make a batch of these and make them available to us?
The calipers, rotors, and machining of the stock rotors can all be done by the individual - the hardest part of the whole thing seemed to be getting the fitment down and getting the bracket correctly sized up along with the brake lines..
Any chance your buddy at the machine shop would be willing to make a batch of these and make them available to us?
The calipers, rotors, and machining of the stock rotors can all be done by the individual - the hardest part of the whole thing seemed to be getting the fitment down and getting the bracket correctly sized up along with the brake lines..