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Hi Everyone, I am writing an app in this "vehicle data analytics for car enthusiasts" space that I think you will find very interesting. It uses the same Bluetooth ODB2 adapter approach but the software is built to be a lot smarter than existing apps in how it gathers, analyses, stores and presents data. It's born out of the exact same itch that PorscheTech3 has articulated many times in this post - I'm a data analytics software guy and a Porsche 911 owner. For anyone who is still interested in this thread (I am!) it would be great to share what I'm doing and get your thoughts on it.
Hi Everyone, I am writing an app in this "vehicle data analytics for car enthusiasts" space that I think you will find very interesting. It uses the same Bluetooth ODB2 adapter approach but the software is built to be a lot smarter than existing apps in how it gathers, analyses, stores and presents data. It's born out of the exact same itch that PorscheTech3 has articulated many times in this post - I'm a data analytics software guy and a Porsche 911 owner. For anyone who is still interested in this thread (I am!) it would be great to share what I'm doing and get your thoughts on it.
It's good to see a renewed interest in this subject after a year or so of non-perticipation..
Feel free to post your App developements here or to start your own thread , you have my support either way. I think a specific App will be very sucesssfull...
The information that can be gathered/analized/presented is the same as that from a Dyno in regards to Air-Flow ...
Air-Flow is the key ingrediant of an ICE engine ( esentially an air pump) in horsepower production ..
"Actual" horsepower production can be broken down into two catagories, " Potential" and "Efficiency"...
Potential::: The potential of any ICE engine to make horsepower is directly related to how much Air Mass flows through it..
Efficiency:: The efficiency of any ICE engine is determined by how well it uses the Air Mass that is avalible to it.....
Hi Everyone, I am writing an app in this "vehicle data analytics for car enthusiasts" space that I think you will find very interesting. It uses the same Bluetooth ODB2 adapter approach but the software is built to be a lot smarter than existing apps in how it gathers, analyses, stores and presents data. It's born out of the exact same itch that PorscheTech3 has articulated many times in this post - I'm a data analytics software guy and a Porsche 911 owner. For anyone who is still interested in this thread (I am!) it would be great to share what I'm doing and get your thoughts on it.
Got some Durametric data today, finally had several days of warm and sunshine got the streets scraped clear so i could get the car out for some runs... was good for both of us !
2007 3.8L Stock, 3rd gear pulls
Here's the data from four runs from MAF (hot film):
720.3, 727.0, 730.1, 734.2 kg/hr ... converted to:
200.1, 201.9, 202.8, 203.9 g/s
4,976' Elevation
44*F Amb air temp
46% RH
29.38 in/Hg (falling)
1.216 correction factor (from wallaceracing.com)
Resulting theoretical HP values: (MAF g/s * 0.75 * correction_factor)
324.43 Min
327.83 Mean
330.66 Max
Got some Durametric data today, finally had several days of warm and sunshine got the streets scraped clear so i could get the car out for some runs... was good for both of us !
2007 3.8L Stock, 3rd gear pulls
Here's the data from four runs from MAF (hot film):
720.3, 727.0, 730.1, 734.2 kg/hr ... converted to:
200.1, 201.9, 202.8, 203.9 g/s
4,976' Elevation
44*F Amb air temp
46% RH
29.38 in/Hg (falling)
1.216 correction factor (from wallaceracing.com)
Resulting theoretical HP values: (MAF g/s * 0.75 * correction_factor)
324.43 Min
327.83 Mean
330.66 Max
Thanks for posting your data.....your MHP is right on par !!
02 cab with 90 k miles. motor seems to be in very good condition. no soot and no noises. I've only put about 1500 miles on it. It has the agency power (i think) short tube headers and 200 cell cats. otherwise all stock. I did two pulls to about 6800 rpm and have the following data. 6768 rpm @ 241 g/s, 6560 @ 226.25, 6114 @ 235 second run....6752 @ 238.5, 6550 @ 228.5, 6133 @ 227 Atmosphere = 45 degree 29.79 inHg 71%
02 cab with 90 k miles. motor seems to be in very good condition. no soot and no noises. I've only put about 1500 miles on it. It has the agency power (i think) short tube headers and 200 cell cats. otherwise all stock. I did two pulls to about 6800 rpm and have the following data. 6768 rpm @ 241 g/s, 6560 @ 226.25, 6114 @ 235 second run....6752 @ 238.5, 6550 @ 228.5, 6133 @ 227 Atmosphere = 45 degree 29.79 inHg 71%
Updated the best I could.
Some people post atmospheric corrections and some don't. Some add HP calculations after an assumed 0.75 efficiency. I have not recorded those things because the reporting is sparse. For many, there just isn't a complete data set.
If I get time, I might look up a reliable source for the atmospheric correction, and add a line for that. Any advised references? I would just want it to be from the same source for everyone. It would give a more apples-to-apples comparison point.
Update for new headers, 997 airbox, Soler throttle body and removed screens from deck lid. Runs today, 1 and 2 nearly identical. 2 pulls per run. All 4 runs peaked above 921 kg/hr at 7,000-7,200 rpm. 3rd gear. Durametric data.
3.8L rebuilt with Nickies, some head work, etc ; with 200 cell TG cats, Soler throttle body enhancements, Agency headers? (the ones on sale cheap last year), TG mild sport cans and Softronics tune. Helmholz delete, 997 airbox. 5w40 oil. Optimum engine and oil temp.
7,200 rpm; 917 kg/hr or 254.7 g/sec uncorrected for MSA; 277.4 g/s corrected.
277.4 / .75=370 theoretical ponies.
Ignition time 17.4-17.7 before limiter cut
Previous run was 239.3/270.7 MSA=361 hp. Ignition time was 15.75-16.1
So my assumption is the engine likes the improved intake breathing and exhaust exit.
And my 0-60 time dropped from 4.3 to 4.2. Wheee!
@hatchetf15 Can you clarify your before/after runs here? I didn't see a separate post, and I can't figure out what the exact setup was for each. What hardware was on the "Previous Run" (239.3g/s), and exactly what was added or modified for this run (254.7g/s)? What were the temperature/atmospherics of your "Previous Run". So as of now, it's not on the table. Thanks!
Yes this is the newest weather correction designed by Patrick Hale specifically for Motorsports, much much newer than SAE........from the Wallace Racing Calulators page... http://www.wallaceracing.com/weather-corr.php
@hatchetf15 Can you clarify your before/after runs here? I didn't see a separate post, and I can't figure out what the exact setup was for each. What hardware was on the "Previous Run" (239.3g/s), and exactly what was added or modified for this run (254.7g/s)? What were the temperature/atmospherics of your "Previous Run". So as of now, it's not on the table. Thanks!
Sure thing! The first run wasn’t submitted since I was trying out how to get the correct fields and data and update rates from the Durametric while driving. After I figured all that out, I did data runs on a later date. On practice pulls I had not installed Soler and Agency Power parts.The following is, indeed, the proper list for the data you posted to the chart:
3.8L rebuilt with Nickies, some head work, etc ; with 200 cell TG cats, Soler throttle body enhancements, Agency headers, TG mild sport cans and Softronics tune. Helmholz delete, 997 airbox. 5w40 oil. Optimum engine and oil temp.
More Durametric data from today, after having done the TB + Plenum + new air filter upgrade, this was on the way back from a 40 mile round trip... so there may still be some adaptation time/miles required. 2007 3.8L TB+Plenum, 3rd gear pulls
Here's the data from two runs from MAF (hot film): 204.78, 205.53 g/s
4,976' Elevation 53*F Amb air temp 24% RH 30.00 in/Hg (rising)
1.226 correction factor (from wallaceracing.com)
Resulting theoretical HP values: (MAF g/s / 0.75 * correction_factor) 335.97 Best run
This is still old gas from late fall... i wonder if that has anything to give to this game.
Albeit same gas as last time i ran these tests before the intake mods.
Last edited by delirium45; 02-04-2023 at 08:09 PM.
Reason: added link to mods thread
01-05-2023, 09:11 AM
