Brake BOOSTER - How necessary for street use ?

[thepeter]

personally from my point of view, I'd opt for a upside-down pedal box.

They are far easier to install, and mount securely to the frame, from an engineering point of view, as topside units require a bracket to be fabbed in most cars which leads to a 'sloppy' pedal feel in the end.

To me, pedal feel is usually improved from using the upside down unit. adjustibility is miles easier as well, and there is more replacement parts/cylinders available -especially the master cylinders, as Tilton/Willwood etc. all do aftermarket replacements which are commonly found on ebay and the like...

And also, as linden touched on, remote resoivoirs are even better, as kicking the res isn't the most inspiring thing to do - four letter words get shouted.

[The Real Roadrunner]

personally from my point of view, I'd opt for a upside-down pedal box.

They are far easier to install, and mount securely to the frame, from an engineering point of view, as topside units require a bracket to be fabbed in most cars which leads to a 'sloppy' pedal feel in the end.

To me, pedal feel is usually improved from using the upside down unit.

i personally think they feel weird compared to a top pivot setup, if braced correctly either is good.

floor mount can feel just as spongy if the floor isnt braced.

cheers
linden

[Disturbed1]

so are u allowed resivors inside the cabin??

[LeeRoy]

You arent meant to run gauges that use fluid inside the cabin hence ones using electonic senders so i would think that having brake fluid run inside the car may be an issue. Although in argument of the other side, a large number of new cars (01 onwards wrx) run brake lines inside the cabin so im not so sure.

[oldcorollas]

you aren't meant to run gauges with squirty hot or flammable liquid from engine into cabin .. hot oil or fuel aimed at your face is bad,...

at least kombis and probably many vans have res in cabin.. as there is nowhere else for it to go...

you could just ring engineer and ask

[SillyCarS]

isn't it the same guy that strted the thread asking for advice? and the same guy that doesn't even understand how a caliper compensates for rotor/pad wear? total fucktard

cheers
linden

You must spread some reputation around before giving it to linden again...

I tried to help him avoid being neg repped the fuck out, oh well

[The Real Roadrunner]

so are u allowed resivors inside the cabin??

yes, there is no rule against it and if you check out most vans you will find them under/behind the dash or attached to the column

cheers
linden

[skiddz]

new hiace's etc have a traditional booster and clutch setup

[o_man_ra23]

Wow, a quick flick through this and its amazing how abently has re-defined the laws of physics for us time to go back to school I guess.

Moving the clutch toward the pinion of the pedal will reduce effort. But in the same sentence, you will require more pedal travel to push the same amount of fluid. To then move more fluid you need to increase MC diameter, which increases effort, and your back to square one.

A friend of mine has an RT charger, and the brake pedal sticks out WAAAAY further than the other two, as it requires a lot more pedal travel to do the same job.

I think OC has spelt it all out pretty well, both in laymans terms, and in full scientific theory... didnt read in detail but I think you went back to first principles didnt you OC??

So, anyone who disagrees with what has been said, really needs to look at grade 5 leverage classes again (Yes, I mean the Grade 5 you were in when you were 10)

[oldcorollas]

first principles = geometry, and was trying to prove what you said simply
the whole pedal effort/travel/master cylinder size is a FIXED ratio you can muck aroudn with it, but if it is way off, then you need to change something else (bigger disc)

[SillyCarS]

now now kids play nice, not everyone can have a degree/phd in engineering

[skiddz]

no but one should listen to someone that has one

[o_man_ra23]

Stu doesnt have a degree in engineering... his is in science(metallurgy)... or do you have an engineering degree too Stu??

Or am I still drunk from uni (finished 2 years ago)??

[Mos]

now now kids play nice, not everyone can have a degree/phd in engineering

It's not really about playing nice. It's not even about degrees or not. It's about depth of understanding.

Those with less understanding should be grateful that people are trying to explain it to them rather than arguing against them. If you need to "look up" a formula, when someone else is deriving the formulas from first pricinciple chances are your understanding of the subject matter isn't as intimate as the person deriving them.

If you disagree with Stu chances are inventing your own laws of physics isn't going to get you very far... In case you're wondering Stu's not shy to argue a point, it just has to be sound reasoning.
A recent favourite attempted argument was "Newton's laws don't apply in drag racing"...

Mos.

[SillyCarS]

Pm'd

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