Today I was driving and went WOT at about 50 miles an hour. My torque app showed PSI at 15.7. I have never seen it this high usually has been maximum of 12.X. Is this normal? I just recently logged and sent to unleashed where torrie updated my tune. Maybe I didn't log properly? What is te maximum PSI you guys have seen?
15.7 PSI reading on my torque pro app today
- Thread starter REDSHOCGO
- Start date
Running 4+, 12.X lbs. is my historically usual high with a rare low 13 lbs. on occasion. Usually a short blast of high torque lower rpm nets me a higher boost reading. Very recent higher than normal of over 13 coupled with not grin inducing performance, and a top of the gear belt like squeak proved to be a vacuum leak at the high pressure fuel pump sensor. Threw a code for a over boost condition according to the dealer. With the leak fixed my boost is lower now mostly 11 to 12 lbs. but the car runs soooo much better! The grin is now back on my face for sure.
Needmoreboost
New member
Unleashed 14-15 psi is the norm. 
IHeartGroceries
New member
We are talking sustained boost here, right? Not spiking?
And an Unleashed tune targets boost at 14-15 lbs?
I thought this was above what is generally conceived as the max, sans WMI.
Sent from my SM-N900V using Tapatalk
And an Unleashed tune targets boost at 14-15 lbs?
I thought this was above what is generally conceived as the max, sans WMI.
Sent from my SM-N900V using Tapatalk
dmharvey79
New member
I've seen readings in the 15s on Torque too, sustained readings tend to be in the 12 or 13 range though.
D
DJE624
Guest
I have lost faith in torque. At least as far as computing boost goes (so far). I think the only way to get a true boost read is with a mechanical gauge.
dmharvey79
New member
Based on the data logs I've done so far it seems pretty accurate (save logs to the Torque site and then go there to pull them up, it is pretty cool). All of the measurements are coming directly from the ECU right?
D
DJE624
Guest
Right, and from what I know, the ECU does not have an actual boost signal. Torque is computing KPA minus BP equals PSI (whatever that is). I want a gauge that will be mechanically operated and tied directly into the right vac line.
IHeartGroceries
New member
Mechanical gauge is definitely the best way to go.
Sent from my SM-N900V using Tapatalk
Sent from my SM-N900V using Tapatalk
I would expect a mechanical gauge to be more accurate than a ECU based gauge for measuring boost. However, wouldn't the ECU based gauge still be useful in establishing a baseline and for comparing different tunes? Also, would it be useful for comparing values at different RPM or throttle openings?
I am still trying to get my head around the boost numbers I am seeing with my Aeroforce gauge.
When I first installed the gauge, I saw a spike of 13.6 but I have NOT been able to duplicate it since. It must have been a fluke or some weird set of circumstances. Last night, I did a couple of WOT runs. In 1st gear, WOT caused the boost to literally jump to 12.1 and it stayed there until the shift when it dropped to about 9. Through most of 2nd gear, it showed 10.6 -10.9 - but no higher. It again dropped at the shift to 3rd. I didn't go to the top of 3rd because I was not in Mexico. Doing some pulls in manual mode 6th gear from about 1500 RPM only showed about 7 PSI.
With my tune, I seem to get more boost in 1st gear than in the higher gears. It also seems to maintain the higher boost all the way to 6200 RPM - at least in 1st and 2nd. Again, I don't know how accurate this is. The car is running great so I am not complaining. Is this behavior consistent with what you guys see with other electronic boost devices?
When I first installed the gauge, I saw a spike of 13.6 but I have NOT been able to duplicate it since. It must have been a fluke or some weird set of circumstances. Last night, I did a couple of WOT runs. In 1st gear, WOT caused the boost to literally jump to 12.1 and it stayed there until the shift when it dropped to about 9. Through most of 2nd gear, it showed 10.6 -10.9 - but no higher. It again dropped at the shift to 3rd. I didn't go to the top of 3rd because I was not in Mexico. Doing some pulls in manual mode 6th gear from about 1500 RPM only showed about 7 PSI.
With my tune, I seem to get more boost in 1st gear than in the higher gears. It also seems to maintain the higher boost all the way to 6200 RPM - at least in 1st and 2nd. Again, I don't know how accurate this is. The car is running great so I am not complaining. Is this behavior consistent with what you guys see with other electronic boost devices?