How do you read boost on Inst panel
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Boost observed on the display is relative to conditions on the engine:
IE: More load on the engine, more boost commanded to accommodate torque requested by the driver. So observed boost commanded is a factor of RPM, Throttle Command, Ambient Air Pressure, Load on the Drive Train (are you pulling uphill), etc. etc. etc.
Your question can not be answered as a linear equation.
You can ease your way up to to 80 MPH, and never observe any boost command.
Or you can leave the car in 4th gear at 60 MPH, then slam the throttle all the way to the floor and observe full boost command.
IE: More load on the engine, more boost commanded to accommodate torque requested by the driver. So observed boost commanded is a factor of RPM, Throttle Command, Ambient Air Pressure, Load on the Drive Train (are you pulling uphill), etc. etc. etc.
Your question can not be answered as a linear equation.
You can ease your way up to to 80 MPH, and never observe any boost command.
Or you can leave the car in 4th gear at 60 MPH, then slam the throttle all the way to the floor and observe full boost command.
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20,170 Posts
The boost indicated is controlled by the ECM. Its based on producing torque of 260 ft pounds. The ECM modulates boost to product that target torque. Boost is a by-product of air density, humidity etc. For example 18 PSI at sea level equates to 23 PSI at 5000 feet.
Boost is not directly related to RPM. Once the minimum RPM is attained to spin up the turbo the amount of boost pressure sent to the intake is based on demand.
Boost is not directly related to RPM. Once the minimum RPM is attained to spin up the turbo the amount of boost pressure sent to the intake is based on demand.
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Somebody's got the permagrin . . .
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Ya I'm not sure it's really beneficial, unless to tell you that everything is working properly?What is the main reason to show the boost numbers? If the car did not have that display and something was wrong, you would still know by how the car is driving!the important part is"step on accelerator, car goes fast" lol . I keep my display on Boost because it's fun to watch(I guess)
Bert
Bert
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I keep my display on temperature - ever since I had the overheating issue (solved with the valves, but always wanting to keep an eye on it).
The boost isn't going to tell you much, although I had to switch my display to US units because although I grok both imperial and metric, except for boost, which I wanted to read when switching to GMPP tune. For some reason, boost in kilopascals does not compute for me.
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Ya I forgot about that. our sol is from the states so MPH and MPG and PSI
Bert
Bert
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I don't grok kilo pascals or litres, give me PSI and MPG (I presume it's US gals though).
I normally keep it on temp since ONCE (I know of) it hit 240. When using the turbo, I probably should not be trying to see the sun washed out display...
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I could never see it for long while driving.....eyes on the road! When I got the GMPP tune I wanted to keep an eye on the boost which led me to get the DDM Gauge pod. Had a boost and air fuel ratio gauge installed and can now watch at eye level!:thumbs:
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Or this... :devil:
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Ya that is a cool boost meter, top notch as is all of TomatoSoups installs. There is a thread, I knew i've seen it before and it took me a little bit to find it.
Solstice Custom Boost Gauge - show and tell
Bert
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But really, is there a reason to watch the boost number? (I mean besides visual stimulation?)
Help an N/A guy out, okay?
lol
Help an N/A guy out, okay?
lol
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No .
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Thanks soup. I'm less stimulated, but satisfied.
Not sure if that's good or bad.
Not sure if that's good or bad.
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