Construction Zone
Don\
Welcome! Log In Register

Advanced

Install a turning brake ?

Posted by B85 
john vanlandingham
John Vanlandingham
Mega Moderator
Location: Ford Asylum, Sleezattle, WA
Join Date: 12/20/2005
Age: Ancient
Posts: 13,993

Rally Car:
Saab 96 V4



Re: Install a turning brake ?
November 05, 2015 10:42AM
Quote
northcoast
Yes, there is a stock proportioning valve located on the codriver strut tower.

Thank you.

OK 10 days after it was asked we have an answer...

Randy--knowing the piston sizes front and rear of what you have and since we've all have many times set up cars with just Master and those sizes and we know that that works very good on gravel in terms of F/R balance..plumb around it. One line from master to handbrake to T to rear calipers; same on front: one line to T to front calipers.
minimal mods, and simplifying..

Now the rears will lock sooner than otherwise and it reduces the need for yanking on the handbrake..



John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.
Please Login or Register to post a reply
autronic
Chris Dale
Infallible Moderator
Location: Newcastle Australia
Join Date: 11/05/2015
Age: Possibly Wise
Posts: 11


Re: Install a turning brake ?
November 05, 2015 01:56PM
If you are still running a stock diagonal split hydraulic system you may want to convert to a front /rear setup with pedal box for brake balance
Please Login or Register to post a reply
B85
Randy Wefel
Professional Moderator
Location: Glendale,AZ
Join Date: 05/24/2014
Age: Ancient
Posts: 12

Rally Car:
98 Forester


B85
Re: Install a turning brake ?
November 05, 2015 06:39PM
Well ! Looks like I will be putting that off for now.

With the Subaru system their are two rear brake lines after the valve. Re-pluming will need to be done . So I will table this idea for now.

Thanks for all the input !
Randy



"Oh, RALLY !
Please Login or Register to post a reply
autronic
Chris Dale
Infallible Moderator
Location: Newcastle Australia
Join Date: 11/05/2015
Age: Possibly Wise
Posts: 11


Re: Install a turning brake ?
November 05, 2015 09:25PM
For the GC Impreza I modified the factory park brake lever with a spring so that the pawl is held in the disengaged position. Remove the release button and spring, lengthened the factory rod and machined a flanged "knob". Operation is now fly off and the park brake can be applied by pushing the flanged knob forward. Keep the brake shoes adjusted.

Adustment of the system is critical to have this function well. Here in NSW,Australia retaing the factory park brake makes the brake test for registration simpler.



Edited 1 time(s). Last edit at 11/05/2015 11:05PM by autronic.
Please Login or Register to post a reply
autronic
Chris Dale
Infallible Moderator
Location: Newcastle Australia
Join Date: 11/05/2015
Age: Possibly Wise
Posts: 11


Re: Install a turning brake ?
November 05, 2015 09:28PM
Adjustment is to be done at the handbrake shoes, not at the 6mm nut on the park brake lever.
Please Login or Register to post a reply
B85
Randy Wefel
Professional Moderator
Location: Glendale,AZ
Join Date: 05/24/2014
Age: Ancient
Posts: 12

Rally Car:
98 Forester


B85
Re: Install a turning brake ?
November 05, 2015 09:58PM
Thanks for the idea, Chris. I will look into that.

How long have the shoes lasted ?



"Oh, RALLY !
Please Login or Register to post a reply
autronic
Chris Dale
Infallible Moderator
Location: Newcastle Australia
Join Date: 11/05/2015
Age: Possibly Wise
Posts: 11


Re: Install a turning brake ?
November 05, 2015 10:07PM
I have not fitted a new set yet on either the GC Impreza turbo or BC Liberty turbo.

If you are using the park brake alot you may well have issues with overheat and excessive
wear. Both cars fitted with DCCD center diffs with micro switch to open the diff when pak brake activated. I have no experience with this setup for VC center diff tho it should work well with a stock
4kg VC.
Please Login or Register to post a reply
B85
Randy Wefel
Professional Moderator
Location: Glendale,AZ
Join Date: 05/24/2014
Age: Ancient
Posts: 12

Rally Car:
98 Forester


B85
Re: Install a turning brake ?
November 05, 2015 10:18PM
Now that would be a tight track !

Just a quick jab then on with the show. It might work for the mean time.



"Oh, RALLY !
Please Login or Register to post a reply
Anders Green
Anders Green
Elite Moderator
Location: Raleigh, NC
Join Date: 03/30/2006
Age: Midlife Crisis
Posts: 1,476

Rally Car:
Parked



Re: Install a turning brake ?
November 20, 2015 07:17AM
Ok, all the prep/build in this thread has missed the most important part.

Quote
B85
Their was one turn this weekend that I could not get the rear end to come around.

(emphasis added)

One turn people. One turn. How about we first consider:

1) Seat time. Seat time. Seat time. Then 100 times more seat time.
2) Did that turn even make a difference? As in, was the driver in question out of the next place up by the amount of time we would guess might have been lost in the turn? Because if that's not the case... screw it, just drive more and have fun. smiling smiley

Anders



Grassroots rally. It's what I think about.
Please Login or Register to post a reply
hoche
Michel Hoche-Mong
Godlike Moderator
Location: Campbell, CA
Join Date: 02/28/2006
Age: Possibly Wise
Posts: 1,124

Rally Car:
Golf, Golf, RX-3



Re: Install a turning brake ?
December 04, 2015 01:04AM
Well, for FWD, in all the events I've done I can think of exactly two corners where I wished I'd had a turning brake, and one of those is on a stage that isn't run any more. Both were on narrow hairpins where I didn't have enough room to wag the back end before the corner. It might be useful to have one for rallycrossing, I guess.

For AWD, it doesn't really buy you much unless you have a center diff that can go open when you haul on it. Otherwise all it does is slow the whole car down, which you already have a pedal for.



Self-righteous douche canoe
Please Login or Register to post a reply
B85
Randy Wefel
Professional Moderator
Location: Glendale,AZ
Join Date: 05/24/2014
Age: Ancient
Posts: 12

Rally Car:
98 Forester


B85
Re: Install a turning brake ?
December 04, 2015 08:48AM
Yep, I get the drive,drive,drive, part.Think I will go out a set up a turn see what I can learn.

And I may look into the stock parking brake turn ?

Not being a Rally drive and not being a AWD racer, it was hard to get the car to rotate. So I will do some more driving and see what I can learn.



"Oh, RALLY !
Please Login or Register to post a reply
NoCoast
Grant Hughes
Super Moderator
Location: Denver, CO
Join Date: 01/11/2006
Age: Settling Down
Posts: 6,740

Rally Car:
Merkur



Re: Install a turning brake ?
December 04, 2015 04:30PM
Sometimes a hydraulic handbrake is a by product of a different improvement, the ability to adjust brake bias.
A stock Subaru 06-07 WRX 4 pot/2 pot brake setup has ~70% front brake bias.
Reducing that bias by increasing rear brakes can be done by running a shittier compound in front or installing a bias valve, which if you are rerunning brake lines, you may as well put in the hydro brake. It also makes U-turns on transits faster, which is important when you stray 5 or 6 miles the wrong way because your codriver was snoozing.



Grant Hughes
http://rally.build
Denver, CO
Please Login or Register to post a reply
B85
Randy Wefel
Professional Moderator
Location: Glendale,AZ
Join Date: 05/24/2014
Age: Ancient
Posts: 12

Rally Car:
98 Forester


B85
Re: Install a turning brake ?
December 04, 2015 04:47PM
"It also makes U-turns on transits faster, which is important when you stray 5 or 6 miles the wrong way because your codriver was snoozing." That's funny Grant !



"Oh, RALLY !
Please Login or Register to post a reply
B85
Randy Wefel
Professional Moderator
Location: Glendale,AZ
Join Date: 05/24/2014
Age: Ancient
Posts: 12

Rally Car:
98 Forester


B85
Re: Install a turning brake ?
August 23, 2016 11:31AM
Been working on the car and went for a test.





Next got a chance to do some time on a new track. FUN !







"Oh, RALLY !
Please Login or Register to post a reply
john vanlandingham
John Vanlandingham
Mega Moderator
Location: Ford Asylum, Sleezattle, WA
Join Date: 12/20/2005
Age: Ancient
Posts: 13,993

Rally Car:
Saab 96 V4



Re: Install a turning brake ?
August 23, 2016 02:07PM
Quote
B85
Been working on the car and went for a test.





Next got a chance to do some time on a new track. FUN !



OH MAH GAWD


Dontcha know?

You drove in a car with a cage and so you must be dead now..All the crusty sea-dogs are unanimous that if you have a cage in a car, you will crack your head open...Its decided... Don't even hafta be in an accident--because banging your head into cage-bas is lethal, but banging head in the steel of the car isn't.

Such a sad fate.



John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

www.rallyrace.net/jvab
CALL +1 206 431-9696
Remember! Pacific Standard Time
is 3 hours behind Eastern Standard Time.
Please Login or Register to post a reply
Sorry, only registered users may post in this forum.

Click here to login