Vacuum servo on turbo engine

To the inlet manifold?

Where else?

normally, the servo has pretty strong non return valve in it anyway.

You only use the brake when off the throttle. When off the throttle the inlet will be at vacuum.

So you've never heard of left foot braking and heel'n'toe?

on some cars it is essential to get the back end round on hairpins, because the handbrake works on the wrong end of the car.

My old (purple) 19 used the standard pipe with a valve in it. The new one doesn't need a vacuum cos of the bendix ABS setup, that'll be me looking forward to many a complete brake failure then!

Don't know about Bendix stuff particularly, but normally, inplace of a standard servo there is a braking accumulator sphere in there with an ABS system. Although, the GT4 has ABS and a Servo.

Exactly the same place you normally do. The engine is only under pressure when you're on boost - it's a vacuum the rest of the time, just like a normally aspirated engine.

Obviously you'll need a one-way-valve in the pipe though, so it doesn't get pressurised :)

Neither of those are applied by normal folks :)

It's hardly essential :)

If you need the handbrake to get round a hairpin, then your car is broken :)

Google for pug 405's and ford scorpios loosing brakes completely and you're sure to get plenty of info.

Basically if anything goes wrong with the system (be it a sensor or what not) it jumps into safety mode which shuts down the brakes altogether. In theory its supposed to leave enough pressure to get you to the nearest garage, in reality it lasts about 4 presses.

Get yourself a vacuum pump off a diesel :)

Sorry?

Or you're making up time on the chap in front of you in something turbocharged or V6'd when you have an old school pushrod...

What he said.

Whilst you're braking, then there'll be plenty of vacuum from the inlet manifold.

"DervMan" wrote in news: snipped-for-privacy@individual.net:

Every car over 2 years old I have ever driven has such a weak handbrake it would never lock the rear wheels when driving! In my yoof I have tried to stop a moving car with the handbrake, lets just say if it was an emergency you might as well jump out!

Will

in news:Xns95F85EAE1D844willreeveorguk@212.159.2.85, Will slurred :

Um. The handbrake in my 12 year old 205 will happily lock the rear wheels, however the braking effect you get then is only about 25% of what you would get by locking both front and rears, so it's not a good way of stopping.

If you apply the handbrake when you are cornering hard, then the rear wheels are closer to thier limit of grip and it takes much less force to lock the wheels - a gentle tug is enough to start the back end swinging out on a damp roundabout.

Thanks for input one and all.

but he's just cruising gently, well within the safe limits of his vehicle.

It's easy to lock the back up when it's only got 35% of the cars weight on it to start with and braking transfers weight away from the rear wheels. With a CofG height to wheelbase ratio that gives a large and quick transfer, it's even worse. Now try it with a properly balanced car with 50/50 weight distribution, low CofG and a decent wheelbase to reduce speed and amount of weight transfer.

You will be a whole lot safer with a with a properly balanced car, that's further away from the limit of rear wheel adhesion. I'm sure there would be far fewer holes in hedges and flowers round random trees than I see these days, if cars had proper balance. Even reducing the speed limit from NSL to 40mph hasn't stopped accidents on one road I know. Now it has 4 cameras in 2 miles and high grip surface on the braking zones and though the bends - I bet that there will still be fatal accidents just like there was when it only had 2 cameras. When it had a NSL driving the whole length at 60mph in my old RWD Celica didn't kill me, didn't even cause any "moments". Why has it killed 5 in 5 years at slower speeds in small (tall and short) and I suspect FWD cars? In one case the newspaper reported that police had said "speed was not the issue" - bet they didn't have a photo from the camera just 50m before the bend. Does 5 star NCAP rating protect you from 40mph sideways into a tree? The current side impact test is a big flat concrete block at about 30mph - slower and nothing at all like a tree. If they made the test match the actuality they would wind up with no moveable openings in the vehicle side, structures like the fedal impact bumper all around the waistline, along with mandatory crash helmets and neck braces to be worn in cars.

LOL.

You'd be right, except, where are all the near and perfect balanced cars? Years ago the weight distribution was measured by many magazines, but not any more (so it seems).

Hmm. Okay the limits would be higher but once the limit has been exceeded, would it not be "worse?"

Perhaps. We'll never know.

It is not the vehicle's fault, it's the lack of skill, care and attention of the driver that's at fault. Presumably you would have been okay in something tall, narrow and front wheel drive?

The royal we could argue about this all week (and I'm sure we have, heh!). Rightly or wrongly and for whatever reasons, the majority of cars are front wheel drive. But I'm sure somebody could stuff a perfectly balanced, super-grippy, docile-at-the-limit car no matter what wheels were driven.

Replacing airbags with six inch steel spikes is my solution... :)

They're coming out of the BMW factory every single day, and have been doing for many years !

:)