Hitting the brakes @ 170
Thread Starter
Evolving Member
Joined: Dec 2005
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From: The moon
Hitting the brakes @ 170
Hey would the brakes work if the engine stopped running @ 170 MPH on an evo x? Or would you lose all stopping power? 
The reason i ask is because one of my friends has a 69 camaro with a wellwood braking system on it. And he was trying to tell me it had 3 boosters on it, so the brakes would work perfect if the engine failed at high speeds.
Sorry for the dumb question in advance...i tried the search it didn't return anything helpful...
The reason i ask is because one of my friends has a 69 camaro with a wellwood braking system on it. And he was trying to tell me it had 3 boosters on it, so the brakes would work perfect if the engine failed at high speeds.
Sorry for the dumb question in advance...i tried the search it didn't return anything helpful...
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Joined: Jul 2007
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From: the land between lancer and evo
lol if its a wide open road let the hand brake rip and assume the praying position.
I am sure you will lose some hydrolic power, You got one good stomp, but if you let up on it and pump again I am sure it will not be effective.
Good question, I dont think anyone has asked that one
I am sure you will lose some hydrolic power, You got one good stomp, but if you let up on it and pump again I am sure it will not be effective.
Good question, I dont think anyone has asked that one
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Joined: Apr 2004
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From: Western North Carolina
The vacuum booster is there to decrease the force that you have to apply to the brake pedal to activate the brakes. Most cars have enough reserve for at least one application after the engine shuts off. Even if it didn't, the brakes would still work, but you'd have to apply much more force to the pedal to get the car to stop.
In other words, it might take both feet, but the brakes would work just fine. For questions like this, I recommend the "How Stuff Works" website or a Google search. Depending on members of this board to answer your questions may get you some interesting answers.
http://auto.howstuffworks.com/auto-p...ower-brake.htm
In other words, it might take both feet, but the brakes would work just fine. For questions like this, I recommend the "How Stuff Works" website or a Google search. Depending on members of this board to answer your questions may get you some interesting answers.
http://auto.howstuffworks.com/auto-p...ower-brake.htm
The vacuum booster is there to decrease the force that you have to apply to the brake pedal to activate the brakes. Most cars have enough reserve for at least one application after the engine shuts off. Even if it didn't, the brakes would still work, but you'd have to apply much more force to the pedal to get the car to stop.
In other words, it might take both feet, but the brakes would work just fine. For questions like this, I recommend the "How Stuff Works" website or a Google search. Depending on members of this board to answer your questions may get you some interesting answers.
http://auto.howstuffworks.com/auto-p...ower-brake.htm
In other words, it might take both feet, but the brakes would work just fine. For questions like this, I recommend the "How Stuff Works" website or a Google search. Depending on members of this board to answer your questions may get you some interesting answers.
http://auto.howstuffworks.com/auto-p...ower-brake.htm
Thread Starter
Evolving Member
Joined: Dec 2005
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From: The moon
This. You'll lose vacuum pressure but the brakes will still work fine. You'll just have to put some muscle into it. If you really want a treat for your passengers, drive a car without power brakes for a week, then take a ride in a modern car. You'll accidentally put them through the windshield.
you should get one prolonged pedal push. let off and you won't believe how much force you will need to get the brakes you expect. iow the seat back may break.
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From: somewhere testing various tires, brakes, and suspensions.
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From: Texas
coming from experience you will have brakes for longer than you think. here is the simple physics. the booster will hold for 2-3 pumps then it will be hard but still work pretty well this car has great brakes. now if you engine dies but your still in gear and the motors turning over even if all the electrical is dead your brakes will work like normal. the engine will still create vacuum. I have 2 project cars one street car and the other drag car. I lost going the engine going down the drag strip had 2 good pumps and on the 3rd was getting hard but seem to hold coming off about 130mph. ran my street car for months without a booster was 50-70% more pressure but any normal male could stop the car. very hard for my wife to press but able to slow the car moderately. alot of modded cars have backup booster reservoir even when driving , you have poor boost with the engine because of the low idle, they dont create enough boost. but as others have mentioned you want have to worry to much since the EVO only does about 155 mph and mines is modded some. if the speedo is right
Last edited by mksevo; May 24, 2009 at 07:26 PM.
coming from experience you will have brakes for longer than you think. here is the simple physics. the booster will hold for 2-3 pumps then it will be hard but still work pretty well this car has great brakes. now if you engine dies but your still in gear and the motors turning over even if all the electrical is dead your brakes will work like normal. the engine will still create vacuum. I have 2 project cars one street car and the other drag car. I lost going the engine going down the drag strip had 2 good pumps and on the 3rd was getting hard but seem to hold coming off about 130mph. ran my street car for months without a booster was 50-70% more pressure but any normal male could stop the car. very hard for my wife to press but able to slow the car moderately. alot of modded cars have backup booster reservoir even when driving , you have poor boost with the engine because of the low idle, they dont create enough boost. but as others have mentioned you want have to worry to much since the EVO only does about 155 mph and mines is modded some. if the speedo is right
