Fordmods Logo

Stopping Distance from 100km 

 

Page 1 of 2 [ 21 posts ] Go to page 1, 2  Next

 
 Post subject: Stopping Distance from 100km
Posted: Sun Jan 14, 2007 1:26 am 
Getting Side Ways
Offline

Age: 29

Posts: 486

Joined: 23rd Sep 2005

Ride: EB S1 3.9L Bush basher

Location: Perth
WA, Australia

Find a flat road you wont slip on and pick a point to stop as hard as you can from 100k's then estimate (im gonna step it out) how long your stopping distance was. Try to do it with cool pads (no prior hard braking). I am just wondering if my stopping distance is normal, better or worse than it is meant to be. Will do it 2moro and post results

 

_________________

I dont care how fast your car is, mine goes faster through the bush.

Top
 Profile  
 
 
Posted: Sun Jan 14, 2007 1:29 am 
Getting Side Ways
Offline
User avatar

Age: 28

Posts: 5889

Joined: 2nd Mar 2006

Gallery: 5 images

Ride: '14 Grand Cherokee

Location: Port Lincoln
SA, Australia

mine for the EA is around 45-50m i think

 

_________________

11/93 ED OPT20 GLi | Full Boat Spec

Top
 Profile  
 
 
Posted: Sun Jan 14, 2007 1:31 am 
Getting Side Ways
Offline

Age: 29

Posts: 486

Joined: 23rd Sep 2005

Ride: EB S1 3.9L Bush basher

Location: Perth
WA, Australia

is that all standard brakes? or something special?

 

_________________

I dont care how fast your car is, mine goes faster through the bush.

Top
 Profile  
 
 
Posted: Sun Jan 14, 2007 1:40 am 
Getting Side Ways
Offline
User avatar

Age: 28

Posts: 5889

Joined: 2nd Mar 2006

Gallery: 5 images

Ride: '14 Grand Cherokee

Location: Port Lincoln
SA, Australia

lol ok maybe 60m, i have standard brakes but there brand new and new tyres

 

_________________

11/93 ED OPT20 GLi | Full Boat Spec

Top
 Profile  
 
 
Posted: Sun Jan 14, 2007 1:52 am 
Getting Side Ways
Offline
User avatar

Age: 30

Posts: 3737

Joined: 22nd May 2006

Ride: BF F6 Tornado - #0077

Location: Bendigo
VIC, Australia

i have slotteds and el gt rims with rda standard pads. i'll have a crack next time i get a chance. do i get to use abs?

the idea is that brain needs to process the red light in front. come on to the brake, begin to brake, brake more when they relise they're in trouble, heat the pad and rotor and not break traction with the ground. plus, large open mags (esspesially in the wet) are a problem with brakes getting cold at highway speeds.

i had el snowflakes with plastic liners in them and they'd cook the brakes something shocking! squeezed the pad so much it mushroomed over the pads!

 

_________________

** For Sale ** http://www.fordmods.com/ford-parts-for-sale-f17/assorted-e-series-parts-t124697.html

F6 Tornado 2006 Build

Is it about sex? The engine in my car? Or a cure for cancer?
No?

Then f**k off

Top
 Profile  
 
 
Posted: Sun Jan 14, 2007 4:08 am 
Getting Side Ways
Offline

Age: 29

Posts: 486

Joined: 23rd Sep 2005

Ride: EB S1 3.9L Bush basher

Location: Perth
WA, Australia

fiftyone wrote:
do i get to use abs?


how can you not use ABS?

Im not testing reaction time, I know im slow, lol, just seeing if the car can compensate for that :)

 

_________________

I dont care how fast your car is, mine goes faster through the bush.

Top
 Profile  
 
 
Posted: Sun Jan 14, 2007 1:05 pm 
ACT Cruise Moderator
Offline
User avatar

Age: 36

Posts: 6275

Joined: 24th Nov 2004

Ride: '06 BF GT-P

Power: 293 rwkw

Location: Canberra
ACT, Australia

ABS will make your result worse.

Try to apply as much pressure as possible without ABS activating, you'll stop significantly sooner.

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

Top
 Profile  
 
 
Posted: Mon Jan 15, 2007 11:41 pm 
ACT Cruise Moderator
Offline
User avatar

Age: 36

Posts: 6275

Joined: 24th Nov 2004

Ride: '06 BF GT-P

Power: 293 rwkw

Location: Canberra
ACT, Australia

Some times from my GT-P

0-60-0mph in 9.282s
0-100-0kph in 9.705s

60-0mph in 128.2ft
100-0kph in 41.92m 3.55s

Times a different because 60mph isn't the same as 100kph (actually 62.1mph)


As for ABS vs. Threshold Braking
Image

The green line, is a foot to the floor emergency brake. ABS kicks in and it is obvious where it does as the deceleration force, backs off several times. While the ABS is pulsing the brakes on and off, each time they're off you're NOT slowing down. So the distance travelled (and the time as seen on the graph) to stop in increased.

The red line, is the same situation, but done with threshold braking*. Note at one point (about 18.5sec) I applied to much pressure and the ABS kicked in. Notice how it only takes 7.5 seconds to stop without ABS (no locked wheels either), but nearly another 4 seconds to stop with ABS.


*threshold braking, using your foot to vary the brake pressure so that as much pressure as can be applied before wheels lock up. This is the most efficient way to stop, as you haven't locked a wheel so you can still steer away from danger, and ABS isn't pulsing the brakes off because you've applied to much brake pressure (and locked a wheel).

Times taken from a G-Tech Pro RR, on a closed private road. I don't suggest testing your brakes on a public road.

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

Top
 Profile  
 
 
Posted: Tue Jan 16, 2007 12:47 am 
Getting Side Ways
Offline

Age: 31

Posts: 3893

Joined: 15th Nov 2004

Gallery: 24 images

Ride: BF MKII V8 Fairmont Ghia

Location: Perth
WA, Australia

nice work datamine.

between you and stockstandard i don't think there isn't a graph you guys haven't produced :D

 

_________________

2007 Steel BF Ghia MKII V8 - 19" GTP's + Superlows

Top
 Profile  
 
 
Posted: Tue Jan 16, 2007 3:35 am 
Getting Side Ways
Offline

Age: 29

Posts: 486

Joined: 23rd Sep 2005

Ride: EB S1 3.9L Bush basher

Location: Perth
WA, Australia

about 55m in the end so i am happy with that

 

_________________

I dont care how fast your car is, mine goes faster through the bush.

Top
 Profile  
 
 
Posted: Tue Jan 16, 2007 12:41 pm 
Getting Side Ways
Offline

Posts: 558

Joined: 6th May 2006

Location: cbd melb.
VIC, Australia

ya nice work...
Top
 Profile  
 
 
Posted: Tue Jan 16, 2007 1:10 pm 
Getting Side Ways
Offline
User avatar

Posts: 681

Joined: 3rd Apr 2005

Gallery: 24 images

Ride: BF MKII Ghia

would wheel size affect stopping distance because of larger or smaller rolling diameter or its that insignificant that it wont make a difference

eg 20' mags with standed brakes

oppose to 14" stock rims
Top
 Profile  
 
 
Posted: Tue Jan 16, 2007 6:46 pm 
ACT Cruise Moderator
Offline
User avatar

Age: 36

Posts: 6275

Joined: 24th Nov 2004

Ride: '06 BF GT-P

Power: 293 rwkw

Location: Canberra
ACT, Australia

I'd say tyre size would be more important - actually the contact patch - how much thread is touching the road.

Another thing to think of is, brake cooling. Big open wheels will keep your brakes cooler - this will help fight fade and keep the fluid from boiling (= very bad), but may mean you're pads never get up to their best operating temperature. Or you're some ricer with 20" dinner plates with no air flow at all to the brakes, after one stop your brakes have faded severely.

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

Top
 Profile  
 
 
Posted: Wed Jan 17, 2007 12:25 am 
Getting Side Ways
Offline

Age: 29

Posts: 486

Joined: 23rd Sep 2005

Ride: EB S1 3.9L Bush basher

Location: Perth
WA, Australia

how do i change from standard dot4 to silicone based fluid? and is it worth doing? Also what are good pads for a heavy breaker? Should I get Bendix (RRP130ish) for $70 or Ferodo Excel's for $31?

 

_________________

I dont care how fast your car is, mine goes faster through the bush.

Top
 Profile  
 
 
Posted: Wed Jan 17, 2007 6:41 pm 
ACT Cruise Moderator
Offline
User avatar

Age: 36

Posts: 6275

Joined: 24th Nov 2004

Ride: '06 BF GT-P

Power: 293 rwkw

Location: Canberra
ACT, Australia

What kind bendix?

On my EL, I preferred Lucas brand 'green' pads.

 

_________________

1998 DL LTD in Sparkling Burgundy, daily, 302W, stereo, slow - 97.5rwkw
2006 BF GT-P in Ego, mods. 293rwkw - 12.427@109 - 0-1000m 24.838@221

Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 2  [ 21 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: No registered users and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Thu Dec 14, 2017 5:37 pm All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names