MK7 "Random / "Stupid" Questions Thread"

[EpicTech]

as Diggs said, P&B means it's been tuned, but easiest way to see is go WOT and look at what boost pressure is. Stock is like 8 psi I think....I may be wrong on the exact number, but it's LOW

The factory gauge display shows absolute pressure though, or at least mine did. When stock I saw it go up to like 28-29. Converted to actual I think it was like 14 or so.

 

[swcrow]

The factory gauge display shows absolute pressure though, or at least mine did. When stock I saw it go up to like 28-29. Converted to actual I think it was like 14 or so.

okay yeah I think you're right......stock on the gauge was absolute so subtracting 14.7 iirc, would give you something like that.....

 

[Subliminal]

if it's spinning tires at 50mph it's tuned

 

[Superfreak]

okay yeah I think you're right......stock on the gauge was absolute so subtracting 14.7 iirc, would give you something like that.....

So I’ve been thinking about this from time to time and trying to figure out my actual boost at my altitude. I believe that I’m at 10.8 ambient psi (relative to temperature) where I live, so do I subtract my total PSI from 10.8 to get an accurate boost psi?

For reference, I use this calculator and use psi, F°, and ft to calculate the altitude that I was logging at. Seems to be really accurate and easy. https://www.mide.com/air-pressure-at-altitude-calculator

 

[Diggs24]

It's in your logs....

https://datazap.me/u/superfreak/5-degrees-brrrr?log=0&data=7-14

 

[EpicTech]

I see 31 pounds of boost. Jeezus that must be fun, mine is at like 26 and its a friggin rocket lol.

 

[Superfreak]

It's in your logs....

https://datazap.me/u/superfreak/5-degrees-brrrr?log=0&data=7-14

Yeah that’s where I got it from. Tuner noticed the altitude and I figured out how, but is it that easy? Subtract ambient from total and get actual boost?

 

[Superfreak]

Sometimes hits 33 down near Denver altitude. It’s a hoot.

 

[Diggs24]

PUT-ambient=boost

 

[Diggs24]

Sometimes hits 33 down near Denver altitude. It’s a hoot.

Max Pressure Ratio table has a cap on it so you don’t overspin the turbo as elevation increases.

 

[Kent42]

Hi! I paid attention to the stock and to the tune on FL motors throttle position floating? should not be 80% as on preFL CYFB?
It worsens dyno?
https://datazap.me/u/kent42/log-1680699192?log=0&data=0-1-2-7

 

[Diggs24]

Hi! I paid attention to the stock and to the tune on FL motors throttle position floating? should not be 80% as on preFL CYFB?
It worsens dyno?
https://datazap.me/u/kent42/log-1680699192?log=0&data=0-1-2-7

Probably hitting airmass setpoint. If you hit this it will start closing the throttle body.

https://datazap.me/u/diggs24/60-130-847?log=0&data=3-4-17

 

[Kent42]

Probably hitting airmass setpoint. If you hit this it will start closing the throttle body.

https://datazap.me/u/diggs24/60-130-847?log=0&data=3-4-17

Okey thanks, I’ll check. do you think a covered throttle cuts power? 100-200 8.4 now

 

[Kent42]

Something like this)

 

[Diggs24]

Correct. The "Mass air flow setpoint for torque intervention" tables need to be moved up.