Turbo gauge question...
- Thread starter Jo3f1sh
- 18 comments
- 9,797 views
- 2,083
- FreedomWeasel
Pretty sure they're somewhat relative. If I recall correctly, the VW GTI only goes up 1/4 or a 1/3 of the meter, while my RS6 fills it nearly all the way.
I know my GTI has a rather small turbo, and low pressure, so this would make sense.
I know my GTI has a rather small turbo, and low pressure, so this would make sense.
- 103
- Fate, TX
- Jo3f1sh84
Hmm...well, I know that the stock boost pressure of a MKV GTI is 10 lbs. (I have a MKV GLI) but I can't remember if the dash values change from car to car, or if it's the same gauge for every turbo car...
Here's something I found...
If going by that picture, it appears that the gauge is representing about 1 bar of boost (14 lbs.) at that particular moment when compared to the display in the center dash...but if the GTI gauge only goes 1/3 of the way up, I guess that wouldn't really work...
I really wish they would've just put values there. Not like it makes a big difference, I just like to know how much boost my cars are running, plus it'd be a nice touch.
CivicInLake
(Banned)
- 461
im pretty sure its just moreso a percentage, most cars cannot hit 100% for more then a few seconds under very heavy load
- 2,083
- FreedomWeasel
I'll check when I get home, but as I said I'm almost positive that my RS6 shows near max boost all the time, compared to my GTI which gets around 1/3 boost all the time. If this is true, it wouldn't be a percentage, but a fixed gauge where the max value is a specific number, so lower pressure setups wouldn't fill the dial.
- 1,835
- Sherbrooke, Québec,
If only PD would let us adjust the boost pressure from car to car...
- 38
- specialedMPLS
isn't the RS6 just a pair of ko4s? shouldn't be boosting much more than the GTI in real life.
that could be done on GT4 if i remember right. they also had nitrous as well... which i think would be fun in that it would give drivers 1 good passing opportunity on the last lap.
- 38
- specialedMPLS
- 419
- South Yorkshire
- GTP_Thedeester1
I wouldnt worry about watching the boost guage tbh. Its mostly fixed to engine RMP....Fit a bigger turbo get more boost? Not always true. You have to alter the settings in the EM ECU to adjust the wastegate actuator...Then alter the settings in the EM ECU that restrict overboosting.
- 487
- PpR_Junkyardspec or GTP_Junkyardspec
- PpR Junkyard
The Turbo Gauge in GT5 is based on BAR measurement, from what I have seen.
- 103
- Fate, TX
- Jo3f1sh84
Not to get too far off topic, but it actually uses two KKK26's. The GTI uses one K03 turbo. The S3 uses one K04.
In stock form, an RS6 should actually only be hitting around 8 psi, which is actually less than the 10 psi that the stock GTI runs.
thedeester1
Well, i guess the main reason I was wondering about it is mainly for realism's sake. I mean, why put a boost gauge there if it doesn't really mean anything.
And while it's true a bigger turbo won't immediately give you more boost, it leaves room for the ability to run higher boost with the supporting hardware, and tend to be more efficient at higher RPMs (where smaller ones run out of breath). But I digress.
- 601
- ProjectTuning
With the spacing of the ticks on the gauge, I'm not sure it's supposed to represent any kind of actual measurement. From the screen above, it would make sense if the 12:00 position tick was 0 with boost to the right and vacuum to the left. Assume that each tick in boost was 0.5 bar and that's a proper boost gauge. The OE gauge in the Evo reads to approx 1.5bar (it's really some odd metric measurement, but is really close to bar), so that would make sense.
The issue is that the gauge flatlines when you're off throttle, meaning it doesn't seem to read vacuum. From this, we assume it's a pressure gauge only, which makes that large spacing between ticks to the left really odd.
My thoughts? It's just eye candy tied to possibly the throttle v. RPM and is linear, not dynamic like real boost (from a turbo at least) which will rise faster or slower and vary slightly depending on engine load. Basically, just coming up with a clever formula to apply to all cars with an arbitrary visual is much easier than basing values on what the real cars run and marking a gauge for each one.
The issue is that the gauge flatlines when you're off throttle, meaning it doesn't seem to read vacuum. From this, we assume it's a pressure gauge only, which makes that large spacing between ticks to the left really odd.
My thoughts? It's just eye candy tied to possibly the throttle v. RPM and is linear, not dynamic like real boost (from a turbo at least) which will rise faster or slower and vary slightly depending on engine load. Basically, just coming up with a clever formula to apply to all cars with an arbitrary visual is much easier than basing values on what the real cars run and marking a gauge for each one.
- 601
- ProjectTuning
Actually, to correct my post above, the gauge does show vacuum, so 0 being at 12:00 with 0.5 bar increments makes sense.
CivicInLake
(Banned)
- 461
The boost isnt 100% with just throttle it tends to build with rpms and engine load both I think. Either way, its showing that the engine is forced.
I always thought that when it didn't fill that meant the car was not turning enough RPM for the "High RPM" turbo. It seems that if you stick a medium turbo on it will fill, then goto the large and it won't. The higher the rpm car works best with high rpm turbo. For instance I can install a medium turbo and get more power than and quicker power on some cars than if I install the larger option.
CivicInLake
(Banned)
- 461
Yeah pretty much, the High RPM doesnt spool all the way on most cars but RPMS dont matter because even if its on a low RPM engine it still spools.
It doesnt scale with RPMs now that I think about it because if it did it would spool up in neutral (which i dont think it does, not 100%) But the difference with the medium and high rpm turbo I have to disagree because the torque is higher and torque curve is pretty close with the high rpm as it is with the medium or low rpm, torque just peaks a bit lower on those two.
so it is rpm and load together on the engine that build boost just like irl.
It doesnt scale with RPMs now that I think about it because if it did it would spool up in neutral (which i dont think it does, not 100%) But the difference with the medium and high rpm turbo I have to disagree because the torque is higher and torque curve is pretty close with the high rpm as it is with the medium or low rpm, torque just peaks a bit lower on those two.
so it is rpm and load together on the engine that build boost just like irl.
Pretty sure it does spool in neutral, well hmm brake full gas full, but maybe that is not true neutral because its always in 1st unless you have a clutch right?
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