Boost Gauge sensor Install Questions
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 2,100
Likes: 52
From: Massapequa Park, NY [This is Not an EXIT]
Boost Gauge sensor Install Questions
I would greatly appreciate if someone could explain how the boost sensor reads pressure.
I'm About to install my boost gauge and to my understanding it is installed as: I run a 3/16 line from the brake booster T to the Blow off Valve, I run another T from that line to my boost sensor.
Is this a correct way to do this? I Do not understand how the sensor can get a boost reading, what does the brake booster have to do with incoming boost?
I'm About to install my boost gauge and to my understanding it is installed as: I run a 3/16 line from the brake booster T to the Blow off Valve, I run another T from that line to my boost sensor.
Is this a correct way to do this? I Do not understand how the sensor can get a boost reading, what does the brake booster have to do with incoming boost?
Race Director
Joined: Jan 2003
Posts: 14,285
Likes: 0
From: Houston, Tx Got traction?
CI 5-6-7-8-9-10 Veteran
St. Jude Donor '07-'08
That's a very large vaccuum line. The Boost gauge simply reads vaccuum. Plus it's a pretty close vaccuum line to the grommets in the drivers footwell, so its pretty easy spot.
Chris
Chris
Instructor
Joined: Jul 2004
Posts: 227
Likes: 6
From: Houston TX
That is the correct way to do it.
Your brake booster is hooked up to the inlet manifold.
During normal driving it sees a vacuum, which when decelerating is used to assist braking.
Under WOT your manifold (and the brake booster) is under pressure.
This is what your gauge is reading. The booster hose is used as a convenient source for boost gauges, waste gates, blow off valves and boost controllers etc...
Don't use your brakes at WOT, they won't work so well and what's the point...
Your brake booster is hooked up to the inlet manifold.
During normal driving it sees a vacuum, which when decelerating is used to assist braking.
Under WOT your manifold (and the brake booster) is under pressure.
This is what your gauge is reading. The booster hose is used as a convenient source for boost gauges, waste gates, blow off valves and boost controllers etc...
Don't use your brakes at WOT, they won't work so well and what's the point...
Originally Posted by Villain C5
I would greatly appreciate if someone could explain how the boost sensor reads pressure.
I'm About to install my boost gauge and to my understanding it is installed as: I run a 3/16 line from the brake booster T to the Blow off Valve, I run another T from that line to my boost sensor.
Is this a correct way to do this? I Do not understand how the sensor can get a boost reading, what does the brake booster have to do with incoming boost?
I'm About to install my boost gauge and to my understanding it is installed as: I run a 3/16 line from the brake booster T to the Blow off Valve, I run another T from that line to my boost sensor.
Is this a correct way to do this? I Do not understand how the sensor can get a boost reading, what does the brake booster have to do with incoming boost?
Thread Starter
Melting Slicks
Joined: May 2003
Posts: 2,100
Likes: 52
From: Massapequa Park, NY [This is Not an EXIT]
Originally Posted by maskell
That is the correct way to do it.
Your brake booster is hooked up to the inlet manifold.
During normal driving it sees a vacuum, which when decelerating is used to assist braking.
Under WOT your manifold (and the brake booster) is under pressure.
This is what your gauge is reading. The booster hose is used as a convenient source for boost gauges, waste gates, blow off valves and boost controllers etc...
Don't use your brakes at WOT, they won't work so well and what's the point...
Your brake booster is hooked up to the inlet manifold.
During normal driving it sees a vacuum, which when decelerating is used to assist braking.
Under WOT your manifold (and the brake booster) is under pressure.
This is what your gauge is reading. The booster hose is used as a convenient source for boost gauges, waste gates, blow off valves and boost controllers etc...
Don't use your brakes at WOT, they won't work so well and what's the point...
Supporting Vendor
Joined: Jul 2003
Posts: 6,486
Likes: 2
From: http://www.mphparts.com 800-364-1975
Originally Posted by muncie21
Sheer speculation on my part, but I'm guessing there's a check valve somewhere between the brake vacuum reservoir and the vacuum/boost line
As noted above, the brake booster LINE sees both boost and vacuum (it's connected to the intake manifold) but the check valve prevents the reservoir from seeing boost.
Le Mans Master
Joined: Jun 2003
Posts: 5,409
Likes: 0
From: Kentucky basketball is life the rest is just details
Amazing that I've had that on there for three years and never noticed where it connects. I just changed the plugs/wires today and while I was in there finally looked at it. It is plumbed into the brake booster.
Yes, I'm not that bright.
Yes, I'm not that bright.
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Premium Supporting Vendor
Joined: Mar 2001
Posts: 5,241
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From: Knoxville Tennessee
Originally Posted by maskell
Under WOT your manifold (and the brake booster) is under pressure.
This is very wrong.
Supporting Vendor
Joined: Jul 2003
Posts: 6,486
Likes: 2
From: http://www.mphparts.com 800-364-1975
Originally Posted by BLOWNZO6
I guess you are technically right...
FWIW when your booster is not under vacuum, you will know it... pedal pressure required to actuate the brakes is significantly increased. I had an issue where my check valve popped out and I almost could not stop the car in time for the traffic light... scary. Point is, it doesn't boost up with the rest of the manifold, or you'd really, really know it.
