All Things Mk5 > Performance Modifications
Has my car been re-mapped?
coldcuppatea:
--- Quote from: Madone on April 07, 2016, 03:10:14 pm ---
--- Quote from: Dan_FR on April 07, 2016, 11:58:52 am ---Do not forget that almost all OBD logging using the MAP sensor provides absolute pressure readings, so you need to subtract approximately 1 BAR of atmospheric pressure to get the true positive 'boost' reading.
Subtracting approximately 14.7PSI from your readings sounds exactly like standard to me, with about 10psi peak settling down to around 6psi by the redline
post the data here if unsure
--- End quote ---
Spot on Dan, fell into the absolute reading myself many moons ago. That sounds like stock levels to me also
--- End quote ---
See post above. Absolute inHg and Boost PSI are different by 14.4 psi...
I'll try again on the way home and log both:
coldcuppatea:
Definitely boosting to 20+ psi / 71 inHg Absolute Manifold Air Pressure. So either it's been remapped or something is amiss. Couple of questions if anyone knows:
- Is there anything I can check that can cause the car to generate too much boost?
- Is there any way to find out what map is on it?
- Would it make sense to get it re-remapped so I know what is on it.
Thanks!
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AJP:
If it doesn't feel like 230bhp, you'll want to get that sorted anyway, whether it's got a remap on it now or not.
So yeah, if it was me I'd be getting it booked in for some software that you know is safe, and you know is giving you proper power. Any remap worth having should give you more like 245bhp minimum and upwards of 280lb/ft.
Just make sure you've got the usual suspects sorted prior to the remap - dv, pcv and cam follower.
Dan_FR:
I'm not convinced. What OBD tool are you using?
The turbo will not sustain 15+ psi at high rpm, even at higher stages of tune. You have an issue with your data logger I'm sure
coldcuppatea:
I'm using a WiFi OBD2 dongle and logging with OBD Fusion on iOS. I do have a Chinese ScanGauge copy kicking around somewhere. It doesn't log but might be worth me plugging it in and seeing what that says.
I think the suggestion of just getting some known software put on the car is probably sensible to be fair.
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