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Old 10-06-2018, 07:09 PM   #1
StreetForged
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Default 1990 240 hydraulic handbrake

I have the lever already Installed, but am wondering if there are any nuances I should be aware of before attempting to do this job. All I need to do is T off from the master cylinder rear line into the handbrake, then T off again back into the two rear lines, correct? This is a single caliper setup, non ABS car. I also have a proportioning valve I was considering installing before the handbrake for burnouts. Are there any issues that come to mind with this plan?
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Old 10-06-2018, 09:28 PM   #2
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I have the lever already Installed, but am wondering if there are any nuances I should be aware of before attempting to do this job.
What size is the piston on the handbrake?

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All I need to do is T off from the master cylinder rear line into the handbrake
Not a T, just a single line.

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then T off again back into the two rear lines, correct?
Yes, and remove the stupid factory valve thing


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This is a single caliper setup, non ABS car. I also have a proportioning valve I was considering installing before the handbrake for burnouts. Are there any issues that come to mind with this plan?
I guess you could try, the the usual way to do it is to put a line lock on the front brakes.
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Old 10-06-2018, 11:36 PM   #3
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how psi stock cna support?


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Old 10-07-2018, 02:04 AM   #4
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Trying to tie into the stock Volvo dual triangulated brake system will be a nightmare. I run a dual caliper setup on my drift 740 and I've never looked back. Super simple to do, and you won't die if you get it wrong.
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Old 10-07-2018, 02:22 AM   #5
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Trying to tie into the stock Volvo dual triangulated brake system will be a nightmare. I run a dual caliper setup on my drift 740 and I've never looked back. Super simple to do, and you won't die if you get it wrong.
Simple is good..
2 rear calipers is for all an awful lot of people going a lot of sideways in much trickier conditions enough to somehow manage fine..
And plumbing 2 calipers in the rear is simpler than plumbing 4.
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Old 10-07-2018, 10:10 AM   #6
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This again.

Ken Block have one so I need one.
R.I.P. Paul Walker.

"If you spend your money wisely, you can build yourself a hydraulic hand braking system for under $250."

I spent around 25$ for mine.
Took the handbrake from a ford (guess who had this idea first) and the clutch master from a Datsun 1979 (like 8$ on Rockauto).

A little bit of work to make a bracket, remove all the unessesary Volvo brake lining nonsense, and tadaaaaa!
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Old 10-07-2018, 11:46 AM   #7
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Old 10-07-2018, 11:57 AM   #8
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Sounds like a winner.
I know we had this discussion before and I know you are not a fan of removing the OEM brake proportioning valve, but when I removed it (a while ago actually), I've put a manual proportioning valve (or reducer) on the rear line. After ****ing around a bunch on gravel, snow, and even asphalt, I was suspicious about the brake bias without the OEM proportioning valve, but not in the way you might think.

I actually think that the brake bias is too much toward the front (locks up WAAAAAAAY to early (especially on snow).

John tried to fool around on his 240 and had the same feeling.

A bit later, Eric Ewert (smart kid from Calgary who rallys a 240) came to John with the same suspicion.

Then SOMEBODY pointed out that in this book : How to Prepare the Sierra for Motorsport , they say to put an adjustable reducer valve on the line that goes to the front calipers.

I mean, we can't confirm anything, but there is food for thought here.
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Old 10-07-2018, 12:24 PM   #9
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I have 2 calipers in the back with each additional being controlled by a separate Volvo brake lever

Op post pictures of your whip
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Old 10-07-2018, 01:10 PM   #10
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Old 10-07-2018, 01:12 PM   #11
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Ya right I have expounded many times about the possibility of recombining the Volvo junk pile to acheive the desired results, but it seems y'all would rather spend big money on racing parts at summit that don't fit the cars and then spend inordinate amounts of time adapting the american stuff to an european system.

Carry on....
I'm not following.
Who is spending money on what...how...when... Summit?

Que?
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Old 10-07-2018, 01:16 PM   #12
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I'm not following.
Who is spending money on what...how...when... Summit?

Que?
Get off his lawn
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Old 10-07-2018, 01:38 PM   #13
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Old 10-07-2018, 02:17 PM   #14
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Just BBK & rip that ish out!
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Old 10-07-2018, 02:20 PM   #15
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See your insults and raise you a proper taunting.

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Old 10-07-2018, 02:28 PM   #16
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Oh yeah?

Thake this:

"How you English say, I one more time-a unclog my nose in your direction, sons of a window-dresser! So, you think you could out-clever us French folk with your silly knees-bent running about in dancing behavior! I wave my private parts at your aunties, you cheesy lot of second hand electric donkey bottom biters."



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Old 10-07-2018, 03:14 PM   #17
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Inb4 French and English piss on 240 partout
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Old 10-07-2018, 03:18 PM   #18
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Old 10-07-2018, 05:00 PM   #19
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Dual diagonal is the spawn of the devil incarnate himself!
Ken...You know the old saying "Horses for courses"?

Or "different strokes for different folks"?

Or this from one of the greatest films EVER.
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Old 10-07-2018, 05:52 PM   #20
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Dual diagonal is the spawn of the devil incarnate himself!




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Ken...You know the old saying "Horses for courses"?

Or "different strokes for different folks"?
Nonsense! The horses designed by some limey in the last century were the pinnacle of all the horses!
Despite the fact that they themselves abandonned this horse design, as everybody else did, is revolting! Everybody should go back to those horses for ever!


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Or this from one of the greatest films EVER.

That is one good movie.

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Old 10-07-2018, 08:29 PM   #21
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Old 10-07-2018, 09:01 PM   #22
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^

On a serious note they make load sensing proportioning valves, as well as the Volvo rising rate style...
Well, I learned something today.

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And aftermarket adjustable proportioning valves, so surely there must be something going on with the brake bias that has caught the manufactures attention.


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To be fair there is also some measure of redundant safety with a front / rear dual circuit system.
Nobody here is denying that.



I'm not saying that you absolutely need to remove all this stuff etc.

I'm simply saying that if you need to modify it for a reason or another (and you vaguely know what you are doing) you can do without, but you need to be more vigilant.
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Old 10-07-2018, 09:14 PM   #23
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I have one of those on my Toyota just like that picture
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Old 10-07-2018, 09:16 PM   #24
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Old 10-07-2018, 09:27 PM   #25
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Ya the Toyota thing is pretty clever, not only does it account for the static load carried, it adjusts in real time as the axle bias changes under hard braking.



True but my point stands [at least I think it does] that a shrewd recombining of various OE junk piles can outperform a bunch of store boughten racing stuff not only dollar for dollar but in actual real world usage.
Absolutely!

I think I need to specify, both me John and Eric have the stock calipers (in the case of me and Eric, just good pads. Works good to me. And I agree, most people I see ****ing with brakes just makes a mess of everything (never considering piston size in relation to the master etc.)

It's annoying.

That being said, I think that my point still stands also : the 240 brake bias should be shifted a little to the rear brakes (if you want to improve performance).

I'm suspecting that the stepped master have something to do with this, I need to take one appart and measure stuff.
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