Dataloging Questions
10-25-2004, 04:15 AM
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Dataloging Questions
I know i'm a new guy here but I must state that I can't stand the format of this Board.
Since this 'Forum' doesn't update the most recent response i'm including my initial questions and the previous thread response below. ANybody ever used the VB type forum? Cause this is NERVE RACKING! (trying to sift through all these 'one liners'!
ORiginal Post
I have an OBDII 'Pocket Logger' from Digiatal Tuning for my Palm M100. I use this device primarily for my DSM (turbo FWD). ITs great I can log, airflow, timing, rpm, o2 etc etc.
I am able to connect and capture data with this OBDII logger connected to my NEW S4!.. The sample rate is only 10 samples per second. But in any regard I did a few runs and logged the 33.66 Lb/Min of Air Flow @ 6300 RPM
O2's showed .86V
Timing Advance = 11-14deg
. This is with a 1Bar (14.7psi) APR Chip. Bi-Pipe, stock exhaust.. I don't have a boost guage yet so I am assuming the car is making and holding boost as the airflow curve is flat accross the RPM band. Are these numbers in line with the type of data you guys are interpolating to Tune?
Thanks!.. I am very happy to find out that my pocket logger will connect to the S4. I just want to make sure i'm looking at these numbers in the right way.
Todd = S4 SLAVE (Jenny's (Ms.S4's Man)
Later
Answer:
your airflow shouldn't be flat across the rpm band
User account number (aid): 33927 Advertiser
Posted by Imolavirus::Infected on 2004-10-24 15:26:40
In Reply to: Dataloging Question posted by Ms. S4 on 2004-10-24 15:20:35
as the rpm's increase, the engine is going to need more air. We usually log our airflow in g/sec (grams/sec) and here is an example log of a 3rd gear WOT pull of my car
RPM'S G/SEC
2600 79.69
2720 94.42
2800 109.92
2960 125.86
3080 149.89
3240 174.5
3400 200.11
3640 222.17
3800 236.5
4000 246.44
4200 255.97
4400 264.22
4600 272.31
4800 277.81
5000 285.47
5160 291.31
5360 294.81
5560 296.75
5720 297.69
5880 302.58
6040 305.47
6200 304.03
6360 305.47
6480 308.03
6600 305.83
Buehn Engineering
Happy "early weekend option" Friday!!!
<PW in training.....professor is the little midget PEB>
2001.5 bumblebee Stg 3- S4
aim: jbuehn
msn: imolavirus AT msn DoT com
Thread:
Dataloging Question - Ms. S4 2004-10-24 15:20:35 (21 views)
your airflow shouldn't be flat across the rpm band - Imolavirus::Infected 2004-10-24 15:26:40 (10 views)
Ok.. Thanks.. Grams/per/sec? I adjusted the scaling of my graph and saw that the air flow was in fact scaaling with RPM..
My buddy (math guru) converted your Gram/per/esc 300 to Lb/min and got 40.6 lb.min. Not bad.. is that on stock turbos? i'm at 34.6/ lb min. so what other mods do you have that may be yeilding the higher flow? I'm at 1Bar with the APR chip. but havn't veryfied that with a boost guage.
Just to give some perspective. The single Turbo Big 28 or 16G, on aDSM (eclipse turbo/upgrade) flows 36 lb/s @ 19 psi. So now i've got two turbo's. Am I to assume each is outputting 19 lb.min to = a total flow of 36 lb/min @ X psi.
Honestly i'm used to looking @ lb flow or grams/per/REV.
What about the O2 Voltage? I showed .86-.88V WOT. Where are these cars 'happiest'? in regard to Air Fuel. ( I realize narrow band o2 is not the best way to tune)
What sort of Timing Advance is 'normal' for an S4 and should I be looking for instances of 'timing retard' to alert me of a lean or detonatiing condition?
Thanks
Todd
Since this 'Forum' doesn't update the most recent response i'm including my initial questions and the previous thread response below. ANybody ever used the VB type forum? Cause this is NERVE RACKING! (trying to sift through all these 'one liners'!
ORiginal Post
I have an OBDII 'Pocket Logger' from Digiatal Tuning for my Palm M100. I use this device primarily for my DSM (turbo FWD). ITs great I can log, airflow, timing, rpm, o2 etc etc.
I am able to connect and capture data with this OBDII logger connected to my NEW S4!.. The sample rate is only 10 samples per second. But in any regard I did a few runs and logged the 33.66 Lb/Min of Air Flow @ 6300 RPM
O2's showed .86V
Timing Advance = 11-14deg
. This is with a 1Bar (14.7psi) APR Chip. Bi-Pipe, stock exhaust.. I don't have a boost guage yet so I am assuming the car is making and holding boost as the airflow curve is flat accross the RPM band. Are these numbers in line with the type of data you guys are interpolating to Tune?
Thanks!.. I am very happy to find out that my pocket logger will connect to the S4. I just want to make sure i'm looking at these numbers in the right way.
Todd = S4 SLAVE (Jenny's (Ms.S4's Man)
Later
Answer:
your airflow shouldn't be flat across the rpm band
User account number (aid): 33927 Advertiser
Posted by Imolavirus::Infected on 2004-10-24 15:26:40
In Reply to: Dataloging Question posted by Ms. S4 on 2004-10-24 15:20:35
as the rpm's increase, the engine is going to need more air. We usually log our airflow in g/sec (grams/sec) and here is an example log of a 3rd gear WOT pull of my car
RPM'S G/SEC
2600 79.69
2720 94.42
2800 109.92
2960 125.86
3080 149.89
3240 174.5
3400 200.11
3640 222.17
3800 236.5
4000 246.44
4200 255.97
4400 264.22
4600 272.31
4800 277.81
5000 285.47
5160 291.31
5360 294.81
5560 296.75
5720 297.69
5880 302.58
6040 305.47
6200 304.03
6360 305.47
6480 308.03
6600 305.83
Buehn Engineering
Happy "early weekend option" Friday!!!
<PW in training.....professor is the little midget PEB>
2001.5 bumblebee Stg 3- S4
aim: jbuehn
msn: imolavirus AT msn DoT com
Thread:
Dataloging Question - Ms. S4 2004-10-24 15:20:35 (21 views)
your airflow shouldn't be flat across the rpm band - Imolavirus::Infected 2004-10-24 15:26:40 (10 views)
Ok.. Thanks.. Grams/per/sec? I adjusted the scaling of my graph and saw that the air flow was in fact scaaling with RPM..
My buddy (math guru) converted your Gram/per/esc 300 to Lb/min and got 40.6 lb.min. Not bad.. is that on stock turbos? i'm at 34.6/ lb min. so what other mods do you have that may be yeilding the higher flow? I'm at 1Bar with the APR chip. but havn't veryfied that with a boost guage.
Just to give some perspective. The single Turbo Big 28 or 16G, on aDSM (eclipse turbo/upgrade) flows 36 lb/s @ 19 psi. So now i've got two turbo's. Am I to assume each is outputting 19 lb.min to = a total flow of 36 lb/min @ X psi.
Honestly i'm used to looking @ lb flow or grams/per/REV.
What about the O2 Voltage? I showed .86-.88V WOT. Where are these cars 'happiest'? in regard to Air Fuel. ( I realize narrow band o2 is not the best way to tune)
What sort of Timing Advance is 'normal' for an S4 and should I be looking for instances of 'timing retard' to alert me of a lean or detonatiing condition?
Thanks
Todd
10-25-2004, 04:52 AM
#4
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10-25-2004, 05:18 AM
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Cool.... Getting Brighter now... Any input on my tuning questions?
THanks for the tips on making it more user friendly. I still think Some Deliniation of information would be nice.. sepaerat areas for General Tech, Turbo tech, Suspension tech, Vendor tech, Smack Talk tech, Engine tech etc.. I'll Shut up now before I get Jenny 'banned' 
its all good..
anyway on to my questions.
Grams/per/sec? I adjusted the scaling of my graph and saw that the air flow was in fact scaaling with RPM..
My buddy (math guru) converted your Gram/per/esc 300 to Lb/min and got 40.6 lb.min. Not bad.. is that on stock turbos? i'm at 34.6/ lb min. so what other mods do you have that may be yeilding the higher flow? I'm at 1Bar with the APR chip. but havn't veryfied that with a boost guage.
Just to give some perspective. The single Turbo Big 28 or 16G, on aDSM (eclipse turbo/upgrade) flows 36 lb/s @ 19 psi. So now i've got two turbo's. Am I to assume each is outputting 19 lb.min to = a total flow of 36 lb/min @ X psi.
Honestly i'm used to looking @ lb flow or grams/per/REV.
What about the O2 Voltage? I showed .86-.88V WOT. Where are these cars 'happiest'? in regard to Air Fuel. ( I realize narrow band o2 is not the best way to tune)
What sort of Timing Advance is 'normal' for an S4 and should I be looking for instances of 'timing retard' to alert me of a lean or detonatiing condition?
Thanks
Todd
its all good..anyway on to my questions.
Grams/per/sec? I adjusted the scaling of my graph and saw that the air flow was in fact scaaling with RPM..
My buddy (math guru) converted your Gram/per/esc 300 to Lb/min and got 40.6 lb.min. Not bad.. is that on stock turbos? i'm at 34.6/ lb min. so what other mods do you have that may be yeilding the higher flow? I'm at 1Bar with the APR chip. but havn't veryfied that with a boost guage.
Just to give some perspective. The single Turbo Big 28 or 16G, on aDSM (eclipse turbo/upgrade) flows 36 lb/s @ 19 psi. So now i've got two turbo's. Am I to assume each is outputting 19 lb.min to = a total flow of 36 lb/min @ X psi.
Honestly i'm used to looking @ lb flow or grams/per/REV.
What about the O2 Voltage? I showed .86-.88V WOT. Where are these cars 'happiest'? in regard to Air Fuel. ( I realize narrow band o2 is not the best way to tune)
What sort of Timing Advance is 'normal' for an S4 and should I be looking for instances of 'timing retard' to alert me of a lean or detonatiing condition?
Thanks
Todd
