Hi Guys,
I tried to find this but cannot...
Can anyone point me to a page where it explains how to read the datalog?
I have the datalog from my run but not sure I am reading it right - ie/ Accel Load, Load, Decel, etc...
I want to work out exactly how much boost its showing and also at what RPM...
Eg, it shows 6320RPM and 200KPa - am I right saying that means 15psi of boost at 6320 RPM?
How do I know where 'boost' starts? eg/ It jumps from 3000ish RPM to 3800rpm...
At 3500rpm showing 56KPa, etc.
Just want to know what all the numbers, etc
Cheers,
Peter
How do I read the Data log?
Moderators: JeffC, rdoherty, stieg, brentp
Hi Brent,
Thanks mate... attached is the last datalog... on 100% its small - I had to go to 800% to read it properly... also had to add .txt so I could upload it.
Is that what you needed or an image of the MJ screen with the datalog open?
Peter
Thanks mate... attached is the last datalog... on 100% its small - I had to go to 800% to read it properly... also had to add .txt so I could upload it.
Is that what you needed or an image of the MJ screen with the datalog open?
Peter
- Attachments
-
- MJLJ_Log_2008-11-02_13.50.14.csv.txt
- MJ Output - 15psi 2nd, 3rd - uphill. Just breaking traction in 2nd.
- (4.24 KiB) Downloaded 446 times
Here's the breakdown of the data columns:
Timestamp - The time for that particular sample
RPM - RPM
Load - Load, in KPA or tps%
Advance - Ignition advance, in degrees
RPM_Accel - the rate RPM is changing, in RPM per sec.
Load_Accel - the rate the load is changing, in Load units per sec.
RPM_Bin - What RPM bin in the ignition map is active
Load_Bin - What Load bin in the ignition map is active
Aux Input - Auxiliary input value
Advance_Correction - The amount of ignition advance correction currently applied.
Mark_Interval - where you marked the datalog while driving "1" shows a mark
"Boost" typically starts when the absolute manifold pressure goes over the current atmospheric pressure, typically around 100-103 KPa.
You are correct in your assumption about correlating RPM and boost. That is the key benefit of datalogging- correlating and comparing the data points over time.
As an example, your datalog shows on the 2nd hard acceleration you went to about 184KPa in about 4.5 seconds from when you started, spanning about 1300 RPMs.
Hope this helps,
Timestamp - The time for that particular sample
RPM - RPM
Load - Load, in KPA or tps%
Advance - Ignition advance, in degrees
RPM_Accel - the rate RPM is changing, in RPM per sec.
Load_Accel - the rate the load is changing, in Load units per sec.
RPM_Bin - What RPM bin in the ignition map is active
Load_Bin - What Load bin in the ignition map is active
Aux Input - Auxiliary input value
Advance_Correction - The amount of ignition advance correction currently applied.
Mark_Interval - where you marked the datalog while driving "1" shows a mark
"Boost" typically starts when the absolute manifold pressure goes over the current atmospheric pressure, typically around 100-103 KPa.
You are correct in your assumption about correlating RPM and boost. That is the key benefit of datalogging- correlating and comparing the data points over time.
As an example, your datalog shows on the 2nd hard acceleration you went to about 184KPa in about 4.5 seconds from when you started, spanning about 1300 RPMs.
Hope this helps,
Last edited by brentp on Fri Nov 07, 2008 5:25 am, edited 1 time in total.