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Old 06-13-2019, 12:27 AM   #151
122power
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Quote:
Originally Posted by culberro View Post
Wilwood forged superlight internals (1.62 bore) in the front with 11.75" x1.25" rotors, and some dynalight 4 piston (1.12 bore) on 11x0.8" rotors out back.

MCs are 3/4" front and rear, with a Tilton bias bar added into the stock pedal box using a 6:1 ratio. I'd probably go 5.5:1 next time.

Stay tuned for a brake kit using these calipers from STS... they'll fit withing an OEM 16" wheel or most aftermarket 15" wheels.

There are some pictures of the pedal box and firewall plate in this album:

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Nice photos! Have a build thread? Always like your posts and info that you post up!
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Old Yesterday, 05:00 PM   #152
Duder
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More thoughts about brake boosters - I just found this Australian remote booster, the PBR VH44. No idea if this is a decent product or not but this (or something like it) may solve a few problems at once for me here. It would allow vacuum boosted brakes for simplicity's sake, without the need for any electric or electro-hydraulic boosting apparatus. The fact that it's de-coupled from the master cylinder would let me choose the best MC for the job in regards to volume ratios vs. the calipers. I think it may also be compact enough to hide it under the inner fender, ahead of the front wheel on the driver's side.



I'm writing this up now mostly as a reminder to myself to look into this more!
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Old Yesterday, 05:42 PM   #153
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That's interesting. So the remote booster just gets plumbed in-line from the master to the junction block? I'm also sort of always looking for good options to remove the stock booster.
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Old Yesterday, 06:12 PM   #154
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Jaguar did a similar thing with much of their 60's and 70's stuff.
Most familiar to me is the 3.8S/4.2S cars. They had a master on the firewall, then a remote booster and "solenoid" plumbed in to improve power.
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Old Yesterday, 06:25 PM   #155
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Won't you need 2 of the boosters to have power brakes on all 4 wheels?
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Old Yesterday, 08:51 PM   #156
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I'm guessing the master on the firewall is just a single circuit and its only job is to jab at the back of the booster, just like the rod directly from the pedal normally would, and then the master on the remote booster has a normal-ish F/R split. PBR is reasonably well known for pads, so it might not be garbage, lol. I wish I'd known of something like that back when I had a 140 I was dreaming about engine swapping
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Old Yesterday, 11:06 PM   #157
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The VH44 has been around since the 50's or there about's and continues to be used on a lot of older cars. There is a lot of info around on the net about them. You may need a larger booster though such as the VH40 which is similar but a bigger diameter and provides additional booster assistance.

PBR are well known in Australia and supplied brakes for a lot of cars built in the country back when that was still happening.
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Old Yesterday, 11:15 PM   #158
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I should add they are designed with 1 line in, 1 line out. When it comes to dual circuits there are a lot of things to consider but one option with appropriate sizing may be using a dual circuit master cylinder with only the front brakes going through the booster. Otherwise two boosters to do the two separate circuits.
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Old Today, 12:28 AM   #159
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Packaging can certainly be a challenge! I ended up running a relocated Hydroboost fed by a KRC pump on my E30 with good results. KRC also has a range of valves to play with for dialing in the amount of assist you like.



Bell cranks to relocate:



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Old Today, 01:02 PM   #160
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Whoa, thanks for all the feedback guys.

Ian - of course, and good point. The remote booster would indeed only work on one circuit. There may be something to the idea of boosted front / unboosted rear, if I end up going that way. I do like the remote vacuum booster idea because it eliminates another hydraulic circuit.

Volvo244GLE - good input; thanks for chiming in with the knowledge!

Tyler - yes, this gets plumbed in-line (in one circuit as others noted) with the output of the un-boosted MC feeding the inlet port of this remote booster. I wonder if any analogous dual-circuit remote boosters exist out there...

Nate - I remember seeing your bellcrank linkages but didn't notice (or internalize) the fact that you used hydroboost on the E30. I'll pick your brain more on that soon. In my project I have room for the MC on the firewall, and I think I have room for hydroboost there as well. I haven't seen any 3-valve 4.6 into 240 swaps other than mine but I know of several people here who've used hydroboost and had clearance for it with 2-valve and 4-valve 4.6 engines. How's the Smurf?
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Old Today, 01:46 PM   #161
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If you split the dual diagonal system into separate front and rear systems then it would be possible to boost just the front brakes but you may not have enough pressure to lock the rears. Using a dual master setup with a balance bar would allow you to properly size the master for the rear unboosted brakes.

The only dual circuit booster I've seen was on a Lancia Flavia Zagato that one of my customers owned and conned me into working on.

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Old Today, 04:18 PM   #162
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I will add my input. So far the hydroboost has gone in smoothly-ish for me. It just barely clears the heads and looks fairly normal in place. The mods that I did need to make to it were all simple - nothing major. A lot of it actually lines up quite nicely with the Volvo setup as well...pedal attachment, master cylinder final location, etc. That being said, I'm very not excited about the hydraulic lines. I just know they're going to leak...lol. With turbo manifolds, I'd be nervous. There really isn't much room in that area with the engine in place, as you know. However, if I've learned anything in my endeavors with my build, nothing is impossible!

I like the idea of trying a dual master cylinder unboosted setup like culberro's. It's compact, simple and completely out of the way. I think of the 2nd to last picture in that flickr album when I say that.

I'll be writing a post detailing how I did the hydroboost on my car in the next day or two. I plan on driving the car with no power steering or hydroboost for first drive. If it's tolerable, I'll leave it that way...
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Old Today, 05:12 PM   #163
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Quote:
Originally Posted by Duder View Post
Nate - I remember seeing your bellcrank linkages but didn't notice (or internalize) the fact that you used hydroboost on the E30. I'll pick your brain more on that soon. In my project I have room for the MC on the firewall, and I think I have room for hydroboost there as well. I haven't seen any 3-valve 4.6 into 240 swaps other than mine but I know of several people here who've used hydroboost and had clearance for it with 2-valve and 4-valve 4.6 engines. How's the Smurf?
Cheers! Happy to assist.

Lots of planning but not much physical progress so far with the Smurf. The associated pile-o'-parts is growing: Parts Car, Engine, Wheels, EFI, Brakes, Tranny, and Clutch are all there heckling me regularly! The time is nigh.
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