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I activated the turbo boost Gauge in the cluster of my 2020 Macan 4 cyl turbo. Wanted to know what the max boost in bar would be in normal mode and sport mode?
Initially I set the max to 1.6 bar for both normal mode and sport (anyone wanting to do this it can be done through PIWIS 3 in engineering mode or I think there are a few aftermarket alternatives that work too - like launch etc)
Anyway, it seems to reach the 1.6 max fairly quickly on acceleration so I need to up it but not sure what to max it out at? Anyone know?
I checked a few logs from the JB4 which shows ecu boost before the added boost is layered on. It seems the max numbers range from 14.5 - 16psi. Around 1 to 1.1 bar seems reasonable for the factory levels.
I checked a few logs from the JB4 which shows ecu boost before the added boost is layered on. It seems the max numbers range from 14.5 - 16psi. Around 1 to 1.1 bar seems reasonable for the factory levels.
Thanks, so then 1.6 should be plenty of graph for standard? I'm slightly confused by it though I've set it to max 1.6 now I can't remember if I've seen it go to 1.6 or not. Might have to set it to PSI and then watch what it gets.
Out of curiosity what's JB4? New to Macan (not new to Porsche) but these newer cars are vastly different to the older ones I'm used to!!
Thanks, so then 1.6 should be plenty of graph for standard? I'm slightly confused by it though I've set it to max 1.6 now I can't remember if I've seen it go to 1.6 or not. Might have to set it to PSI and then watch what it gets.
Out of curiosity what's JB4? New to Macan (not new to Porsche) but these newer cars are vastly different to the older ones I'm used to!!
I can't see it getting above 1.6, even if you are operating in dense, cool air at sea level. My readings are at sea level but probably a bit more humid and warm here in Florida.
The JB4 is a piggyback tuner. They have been around for a couple of decades, started on BMWs and expanded from there, a reputable company. My current tune is adding a peak of 7.5 psi over stock and it really wakes up the engine to add more performance to the base model.
I can't see it getting above 1.6, even if you are operating in dense, cool air at sea level. My readings are at sea level but probably a bit more humid and warm here in Florida.
The JB4 is a piggyback tuner. They have been around for a couple of decades, started on BMWs and expanded from there, a reputable company. My current tune is adding a peak of 7.5 psi over stock and it really wakes up the engine to add more performance to the base model.
Thanks, I might look into the JB4 although its my wife's car so I probably wont do that much to it.
For the gauge, it seems to get to the full graph under acceleration so I might up it to 1.8 and see what happens. Ideally if it doesn't show 'full bars' then 1.6 would be the absolute max.
Thanks, I changed both to 1.6 guessing that the boost being greater in sport vs normal mode must only be for the S/GTS/Turbo.
Any thoughts on the max being 1.6? Might up the scale to 2.0 and see what happens to the gauge.
Max boost is always the same in any drive mode for any trim/engine. The drive modes only change transmission and throttle settings from a drivetrain perspective.
I think 1.6 is too high based on my data but it's not the first time I've seen an OE boost gauge not lining up with an external boost gauge. 1.6 bar should not be needed on a modern 2.0 to create the mediocre stock power levels. For example, the GLA45 AMG uses 27.5 psi (1.9 bar) on its 2.0 to get to 382hp. It shouldn't be much more than 1.1 bar as I am seeing to get to 250-260hp on the EA388.
Max boost is always the same in any drive mode for any trim/engine. The drive modes only change transmission and throttle settings from a drivetrain perspective.
I think 1.6 is too high based on my data but it's not the first time I've seen an OE boost gauge not lining up with an external boost gauge.
Interesting that there is both max normal and max sport that can be changed if the boost stays the same regardless of mode. Might keep looking into it, I can definitely feel like there is more boost happening at full acceleration when the gauge shows 1.6.
Thinking about this some more I could put PIWIS 3 into data logging and record the boost pressure as I drive and see the results. Might do that so we have some data points.
Interesting that there is both max normal and max sport that can be changed if the boost stays the same regardless of mode. Might keep looking into it, I can definitely feel like there is more boost happening at full acceleration when the gauge shows 1.6.
Thinking about this some more I could put PIWIS 3 into data logging and record the boost pressure as I drive and see the results. Might do that so we have some data points.
It may be a carryover from a 911 or other engine where the transmission settings can increase max hp by more rpm.
If the power curve creates more hp at 6500 rpm than 6000, then sport mode that shifts at 6500 vs. 6000 in normal mode would create more power due to the shift points and boost may creep requiring a higher boost limit on the gauge. Not the case in the Macan 2.0 that peaks much sooner, but possibly on other engines.
Definitely worthwhile to log, I haven't logged in any mode but Sport +.
It may be a carryover from a 911 or other engine where the transmission settings can increase max hp by more rpm.
If the power curve creates more hp at 6500 rpm than 6000, then sport mode that shifts at 6500 vs. 6000 in normal mode would create more power due to the shift points and boost may creep requiring a higher boost limit on the gauge. Not the case in the Macan 2.0 that peaks much sooner, but possibly on other engines.
Definitely worthwhile to log, I haven't logged in any mode but Sport +.
I had thought the same thing perhaps an engineering carryover from other model lines. Mine doesn't have sport+ but I can log and see what boost pressure I get. I'll post the results when I have them.
Okay so in both Sport and Normal mode with the max set to 2.30 the gauge doesn't get past 2.2 so that's the max it will reach. Outside temp was 18 degrees C.
Okay so in both Sport and Normal mode with the max set to 2.30 the gauge doesn't get past 2.2 so that's the max it will reach. Outside temp was 18 degrees C.
That makes sense, the stock ecu is using absolute manifold pressure (which includes about 1 bar of atmospheric pressure on top of actual turbocharger boost) for the boost readings so that can include variations for where the vehicle is operated.
Below is an article that references VW using it so I assume its the same for Porsche.
Okay so first run max 2.209 bar that's all I could get without breaking the law!
I'll try one more time in normal see what I get and I'll do a sport mode run just in case.
Here's normal mode max I recorded:
Is that pressure in absolute or gage? I suspect absolute which would make it 1.2 bar gage which makes more sense. I suspect the readout in the car is gage pressure, not absolute.
09-20-2024, 10:08 AM
2020 Macan 2.0T Max factory turbo boost?
