How much boost should I be getting?
- Thread starter Depraved
- Start date
Are you tuned? If not, it's possible that Torque Management is limiting your power output on 91 octane by pulling boost. I have yet to see a info of a comparison of boost pressure on a stock tune on different octanes. You should be peaking around 12-15 psi on a stock tune near sea level at moderate ambient temps.
If you are tuned, you likely have a boost leak. Check all of your boost side connections. Which tune are you running?
14 Sonic LT 1.8A MBM
If you are tuned, you likely have a boost leak. Check all of your boost side connections. Which tune are you running?
14 Sonic LT 1.8A MBM
Last edited:
Trifecta tunes are tuned on 93 E10, based on feedback from their tech support. As you run lower octane, it will detune to protect internals and it will pull boost and timing accordingly. Running 93 will allow for additional boost by eliminating knock.
If you don't have a boost leak... Try running 93, check and/or replace your spark plugs, also check for proper gap, clean your MAF sensor....
How many miles on the engine?
Original turbo?
What is the normal ambient temp and humidity where you live?
What level of Trifecta tune do you have? Can you send them a few logs for feedback?
14 Sonic LT 1.8A MBM
If you don't have a boost leak... Try running 93, check and/or replace your spark plugs, also check for proper gap, clean your MAF sensor....
How many miles on the engine?
Original turbo?
What is the normal ambient temp and humidity where you live?
What level of Trifecta tune do you have? Can you send them a few logs for feedback?
14 Sonic LT 1.8A MBM
Depraved
New member
Apparently 16psi is within the typical range, so it looks like everything's fine. I'm going to run 93 next fill up to see if anything changes, but it looks like I'm doing alright.
To quote Trifecta:
Thanks for the update. Yes, you will typically see 16-21psi depending on environmental conditions, fueling, etc. Remember, boost is not the deciding factor here. Boost is relative. Timing, air:fuel ratio, and other parameters are all factored in to achieve the power/torque goal.
To quote Trifecta:
Thanks for the update. Yes, you will typically see 16-21psi depending on environmental conditions, fueling, etc. Remember, boost is not the deciding factor here. Boost is relative. Timing, air:fuel ratio, and other parameters are all factored in to achieve the power/torque goal.
Depraved
New member
What would be the best way to do that?
Depraved
New member
Oh I actually have torque. That's how I was checking the boost levels. I'll give that a try later tonight and report back.
ScarabEpic22
Member
Boost is simply a part of the overall power equation for our engines. If the ECM asks for (simple example) 180ft/lbs at 4000rpm and can deliver that with 16psi, it won't increase boost to 17psi.
Depraved
New member
I understand that part. However, everyone I've seen post about their tune has said that they've hit 20-22 psi. It didn't make sense to me that everyone else's vehicles would need 20-22psi to reach 180lb-ft whereas mine could do it with 16psi.
I just wanted to know if anyone else was in my situation where they were only hitting 16psi. If other people were also holding at 16psi, then I wouldn't have any cause for concern.
Depraved
New member
Do you know what the PID is for the ECM estimated torque?
nickalltogether
New member
2705 I believe.
Depraved
New member
Hm, I'm probably putting it in wrong. When I add a custom PID it's asking for OBD2 Mode and PID. Do I just put 2705 in?
nickalltogether
New member
Not sure. That's the number vcm scanner gives me
Depraved
New member
Okay, turns out I'm not actually running at 16psi. I had the gauge calibrated wrong. With it calibrated I was hitting 19.4 peak, which is much more in line with what I was expecting at sea level.
I'm still interested if anyone can find the right PID number for the torque app though.
I'm still interested if anyone can find the right PID number for the torque app though.
