obd eleven boost gauge ?

[Matt2408]

I tried to find what data I need to look at when using the gauge feature in obd eleven but not sure. and I able to find my boost gauge via obd eleven ?

Sent from my SM-G950U1 using Audizine mobile app

[Spawne32]

live data under engine control, charge pressure actual value

[Matt2408]

live data under engine control, charge pressure actual value

great really want to see the psi my cars at

Sent from my SM-G950U1 using Audizine mobile app

[Spawne32]

great really want to see the psi my cars at

Sent from my SM-G950U1 using Audizine mobile app

In OBDeleven you will have to subtract 14.7 from whatever reading you get in PSI.

[Matt2408]

In OBDeleven you will have to subtract 14.7 from whatever reading you get in PSI.

so I got about 2200hpa which is like 2.2 bar or 31 psi - 14.7 is still over 16 psi. should I believe that is that accurate ?

Sent from my SM-G950U1 using Audizine mobile app

[Spawne32]

so I got about 2200hpa which is like 2.2 bar or 31 psi - 14.7 is still over 16 psi. should I believe that is that accurate ?

Sent from my SM-G950U1 using Audizine mobile app

Tuned? Depending on the tune level, yeh 16psi is about a stage 1.

[Matt2408]

Tuned? Depending on the tune level, yeh 16psi is about a stage 1.

I looked through the graph and it maxed at about 13.7 - 13.8psi. the car is stock as far as I know no intake, catless. precious owner said he did no power mods maybe the owner before that but I'm unsure is 13.8 possible stock

Sent from my SM-G950U1 using Audizine mobile app

[Spawne32]

I looked through the graph and it maxed at about 13.7 - 13.8psi. the car is stock as far as I know no intake, catless. precious owner said he did no power mods maybe the owner before that but I'm unsure is 13.8 possible stock

Sent from my SM-G950U1 using Audizine mobile app

Sounds about right for stock, i think stock boost levels are somewhere between 12-14psi.

[Matt2408]

Sounds about right for stock, i think stock boost levels are somewhere between 12-14psi.

ok thanks for the help.

Sent from my SM-G950U1 using Audizine mobile app

[Novarider]

I thought stock psi was 16 and tuned was 20?

[old guy]

I thought stock psi was 16 and tuned was 20?

It all depends upon which generation EA888 (1, 2 or 3). The range is from .6 bar (8.7 psi) to 1.2 bar (17.4 psi): Clicky click-1®. More info about different engine options: Clicky click-2®

[Novarider]

It all depends upon which generation EA888 (1, 2 or 3). The range is from .6 bar (8.7 psi) to 1.2 bar (17.4 psi): Clicky click-1®. More info about different engine options: Clicky click-2®

B8 have gen 2 right?

[old guy]

B8 have gen 2 right?

Correct for the US versions. What I find interesting though is that the stock boost on my 2013 A5 CAEB is slightly over 16 psi. Confirmed by both VCDS and TorquePro. Apparently there are a lot of different variations of the EA888.

[irobb]

I figured out how to log boost with obdeleven but not too sure how to convert the data into psi with the csv file in excel. Can anyone help?

Do I take the values like below and convert then subtract 14.7?

1 hPa = 0.0145037738 psi
1 psi = 68.9475729318 hPa

[bhvrdr]

I figured out how to log boost with obdeleven but not too sure how to convert the data into psi with the csv file in excel. Can anyone help?

Do I take the values like below and convert then subtract 14.7?

1 hPa = 0.0145037738 psi
1 psi = 68.9475729318 hPa

Its 14.5psi. Take hpa or bar and multiply it but first you have to subtract ambient pressure which at sea level is generally around 1 bar or 14.5psi.

So if a person saw 2400mbar youd subtract the ambient 1000mbar and multiply the remaining 1.4bar x 14.5psi

Mike

[Novarider]

(Charge air pressure - ambient air pressure(980 for me) )*0.01450378911491

[Smac770]

The ambient psi is going to vary with altitude and other factors. Just look at the actual charge pressure when you're sitting idle in park and that is your current ambient.
The charge pressure measure in the ECU is an absolute measure, not like a gauge measure, or "boost", which is pressure above ambient. Thus why you're having to make the subtraction to find your boost value (in hPa).

From what I can find, B8.0 in the US used only the CAEB 211PS (208bhp) motor. B8.5 used a mix of CAEx gas only and CPMx flex fuel engines, with CAEB and CPMA at 211PS (208bhp) (2013) and CAED and CPMB at 220PS (217bhp) (2014-2016). But they are all EA888 Gen2 with AVL (audi valve lift).
CAEB should max out around 10.5-11 psi boost.

[Novarider]

So is it 10-11, 13-14 or 16?

I had previously read 16 was stock and stage 1 was 20 psi

After searching people report anywhere from 14-17 on a stock tube.

Now I have no idea if my tune is activated.

[Smac770]

Engine Repair manual for my 2009 CAEB motor says checking the wastegate actuator, should start to move around 4psi boost and be fully traveled (10-12mm) around 10.5psi boost. Logging charge pressure actual shows very brief peaks (for one or two sample at most) in the low 25.x psi, where my ambient is typically 14.2 psi. So for my stock B8 2009 CAEB, 10.5-11 is what I see and what the factory docs imply it should be.

[old guy]

Engine Repair manual for my 2009 CAEB motor says checking the wastegate actuator, should start to move around 4psi boost and be fully traveled (10-12mm) around 10.5psi boost. Logging charge pressure actual shows very brief peaks (for one or two sample at most) in the low 25.x psi, where my ambient is typically 14.2 psi. So for my stock B8 2009 CAEB, 10.5-11 is what I see and what the factory docs imply it should be.

I don't disagree, and all the information I can find supports your findings. But the data that I can pull from my 2013 A5 CAEB indicates otherwise???

kPa in my location is 995 millibar (14.4 psi). I am seeing a maximum boost request of 2130 millibar (30.9 psi). Actual charge pressure at that request is typically around 2134 (30.95 psi).

Subtract atmospheric kPa from the requested boost (2130mb - 995mb = 1135mb) and you come up with a requested boost of 16.5 psi.

When I run TorquePro I also see boost pressures around 16 psi.

Disclaimer: I purchased my A5 used with 30k miles on the clock. It has been to the dealer twice for the stupid auxiliary water pump recall. Both times they relashed the ECM so I assumed that any aftermarket tune on my A5 would have been overwritten??

Some additional info: When I set my Neuspeed Power Module to +5 psi is see boost levels around 20 psi on TorquePro. When I set the NPM at +8 psi I see boost levels around 22→23 psi.

[Smac770]

Can't speak for a B8.5 2013 car. But I will see requested charge pressure as high as mid 30s. I think whoever wrote the code messed up something. If I'm sitting at 14.2 and floor it, the requested charge pressure shoots to mid 30s (basically, max minus current and then that difference added on top of max), and then as the actual charge pressure approaches the design max, the requested boost drops by the same amount, until they meet at around 24-25. I have no idea what the point is of having a requested that's far beyond the capable max.

But I have had the oil consumption fix, with the ECU update to use the later PCV. Maybe the update was just a complete reflash of the final CAEB (2013) programming and the 2013 CAEB actually tries to go to 16 boost. I've seen other B8 A4 request charts show it shooting up to 25 charge pressure or so and sitting there waiting for actual to come to it, so mine does seem out of norm vs that.

I wonder if you have the 702L/Q/S (B8.0) or 702R/703N/R/S (B8.5) turbo part. Adding nearly 50% boost for no extra hp seems really odd for an already in place motor. I wonder what's actually different between the two turbo lines.

[Smac770]

old guy, is your 2013 A5 a CVT or manual tranny? Wondered why CAEx (plastic manifold) was still around in B8.5, and what I find seems to imply they kept using those on the CVT and manual tranny cars, no idea why.

[old guy]

It's a B8.5 CAEB 6-speed manual with a 10/12 build date. (plastic manifold). It has the latest revision tensioner but not the latest revision chain. It seems to be somewhat of a hybrid between the earlier and the later versions.

[Adams-Allroad]

My audi is 2013 allroad 2.
0t cpma stage 2 APR
I use both vcds and torque.
Vcds I think need to convert boost.
All Group not reading
G, group 115 I think was boost.

Torque get readings of 40 psi

Any think help me with , setup.

[old guy]

In order to use TorquePro to monitor boost you have to have the vehicle profile and vehicle settings set correctly. Vehicle weight, fuel type and engine displacement. Select boost calculation method. In advanced settings make boost adjustment for atmospheric pressure for your location. You may have to adjust the volumetric efficiency slightly to account for the turbo vs a NA car.

[Adams-Allroad]

Vehicle profile
Engine 2.0
Weigh 1820kg
Fuel petro
Boost adjustment -14 psi
Drag coefficient 3.1

[old guy]

Try changing your boost adjustment to 0.0 since you are essentially at sea level in Toronto.

Go to OBD2 Adapter Settings and make sure MAP is selected as the Boost Calculation Method. Make sure Faster Communication is selected. Also select "Don't calculate MPG/Fuel" to speed up data transfer.

Let's see what you get.

[Adams-Allroad]

Thank you

Will test

[Nick4929]

So is it 10-11, 13-14 or 16?

I had previously read 16 was stock and stage 1 was 20 psi

After searching people report anywhere from 14-17 on a stock tube.

Now I have no idea if my tune is activated.

I have a 2014 2.0t with a stage one tune and I just used my OBDeleven live data while doing some pulls. I peaked at 2400 hbar so minus the 1000 for ambient and then multiplied the remaining 1400 by 14.5 it equals 20psi at peak boost with a stage one APR tune. I also have a down pipe and bigger in take on the way

[Nick4929]

So if a person saw 2400mbar youd subtract the ambient 1000mbar and multiply the remaining 1.4bar x 14.5psi

Sorry I multiplied by 1.4 not 1400*