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slipkknotfan
03-13-2007, 12:31 AM
when you turboo your car how do you keep the vacuum brake booster?
murda-c
03-13-2007, 01:12 AM
don't hit the brakes while boosting?

you should be off the throttle when you're on the brakes anyway...
KeWLKaT
03-13-2007, 02:22 AM
what he said.

dont worry about it. never had a problem myself.
OH_Beta_Accent
03-13-2007, 08:58 AM
There's a check valve in the brake booster so it'll build it up while off boost, but yeah if you were constantly boosting and braking at the same time, you could theoretically loose the vacuum assist on your brakes.
slipkknotfan
03-13-2007, 02:03 PM
thanks for answers. been thinking about that for a long tinme.
Cypher
03-13-2007, 09:24 PM
when you turboo your car how do you keep the vacuum brake booster?

what?
05xd
03-13-2007, 09:32 PM
what?

Exactly what I was thinking!?!?!?
Cypher
03-13-2007, 09:41 PM
glad i'm not the only one!
KeWLKaT
03-14-2007, 12:54 AM
comon guys he is asking about how the booster gets its vacuum to assist....
extremeaudiowa
03-14-2007, 01:11 AM
I didnt realise while boostin the engine does not produce vacuum......

I guess it makes sense really but never really worried about it...

How do factory turbocharged vehicles combat this issue
KeWLKaT
03-14-2007, 01:41 AM
dude you dont boost CONSTANTLY

whens the last time you had the right foot accelerating and left foot on brake

as soon as you let go of the gas for 0.00000001 seconds it goes back to vacuum
extremeaudiowa
03-14-2007, 03:05 AM
Righty then......

Interesting......

Im going to do some more research on this.....
KeWLKaT
03-14-2007, 03:19 AM
what you thought a turbo car constantly produces boost?
05xd
03-14-2007, 06:56 PM
^^^^^That would be a dream lol
Boosting at idle ahhhhhhhh
evan938
03-14-2007, 08:04 PM
^^^^^That would be a dream lol
Boosting at idle ahhhhhhhh

not very far from a dream...they call it a s-u-p-e-r-c-h-a-r-g-e-r
Cypher
03-14-2007, 08:39 PM
not that much boost and you don't see it with a bypass valve.

i had my left foot on the brake and right on the gas today when messing with the work trucks :D
extremeaudiowa
03-14-2007, 08:47 PM
No not at all....

I thought with boost it pressurised your cylinders, not the plenums and **** where you get vacuum and stuff.... To be honest i basically never thought of it till now
ricerrx7
03-14-2007, 09:19 PM
Do you know how an engine works? You get vacuum because the pistons are sucking the air out of the intake manifold. You need two things to create vacuum; Movement and restriction. The movement comes from the pistons, the restriction comes from the throttle plate. When you start "boosting", it fills the intake manifold with positive pressure. This then forces air into the cylinders rather than letting them suck the air in.
Keyan
03-14-2007, 09:44 PM
If you are really that concerned about it, install a one-way check valve into the brake booster line.


problem solved.
ricerrx7
03-14-2007, 09:54 PM
^Every vacuum operated brake booster system already has one installed. Problem solved...
Cypher
03-14-2007, 10:59 PM
This then forces air into the cylinders rather than letting them suck the air in.

thus FORCED INDUCTION.... YAY!!!
ricerrx7
03-14-2007, 11:04 PM
Funny how that works, huh?
WytchDctr
03-14-2007, 11:32 PM
I think this was a legitimate question from someone that doesn't fully understand whats going on inside of an engine. At least as far as air pressure under different situations. If we where all experts why even have this board at all?

As far as not hitting the gas and brake at the same time.. no one can heal-toe here? lol.

(^-being a smartass... I hope no one is heal-toeing running around town ha. If its a boosted car Id hope it would see a track at some point)
extremeaudiowa
03-14-2007, 11:54 PM
I think this was a legitimate question from someone that doesn't fully understand whats going on inside of an engine. At least as far as air pressure under different situations. If we where all experts why even have this board at all?

As far as not hitting the gas and brake at the same time.. no one can heal-toe here? lol.

(^-being a smartass... I hope no one is heal-toeing running around town ha. If its a boosted car Id hope it would see a track at some point)

Thanks someone that agrees with me.....

I understand the engine and how it works as i said in a previous post but i never really thought about it. The only Boosted car i have owened was a series 3 RX7 with a 13B turbo.

But thanks for the replies I will think before i post on this board again and get abused for asking an honest question
SuperGLS
03-14-2007, 11:55 PM
Come on guys, the question wasn't bad.

Let's try to limit the sarcastic comments when someone is trying to learn something.

EXD is a friendly place, let's keep it that way.
cclngthr
03-15-2007, 12:18 AM
Come on guys, the question wasn't bad.

Let's try to limit the sarcastic comments when someone is trying to learn something.

EXD is a friendly place, let's keep it that way.

Exactly.
KeWLKaT
03-15-2007, 02:53 AM
As far as not hitting the gas and brake at the same time.. no one can heal-toe here? lol.

(^-being a smartass... I hope no one is heal-toeing running around town ha. If its a boosted car Id hope it would see a track at some point)

Yeah I love doing it all the time, but still, I said "left foot on brake" ;) and you dont boost on heal toe (not much anyways)

and since the one way valve is there it "keeps" the vacuum for a little while