Peformance calculators????
07-18-2009, 07:27 PM
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Peformance calculators????
My car weighs 3400pds with me in it. It is rwd. auto transmission. After reveiwing my datalog pull from 0-100 mph...it did it in 12.13 sec.
I have been street tuning and havent been on a dyno in over a year.
I'm trying to figure out what my hp/tq is and maybe a 1/4mile estimate from this data. Does anyone know of any caclulators to find this out?
I have been street tuning and havent been on a dyno in over a year.
I'm trying to figure out what my hp/tq is and maybe a 1/4mile estimate from this data. Does anyone know of any caclulators to find this out?
07-18-2009, 07:58 PM
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Re: Peformance calculators????
Yeah, go to a dyno. Estimating power from datalogged figures is really crude at best, and there are too many variables to get an accurate estimation. If you have output graphs of your acceleration in each gear and some other parameters, you can do some rough integration and figure some of the stuff out with some fudge factors. I'm assuming that you probably don't have a datalogging setup with the sophistication needed to do that though.
Last edited by Fabrik8; 07-18-2009 at 08:02 PM.
07-18-2009, 08:07 PM
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Re: Peformance calculators????
Basicilly I'm trying to get a rough estimate...I have a set of heads at the shop being pp and adding bigger valves...also going to be specing a cam once we get the flow numbers. Just trying to figure out what type of gain I will see once the new setup is complete.
Thanks though
07-18-2009, 08:11 PM
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Re: Peformance calculators????
No...all I have is a x-cal2 witch can datalog ceratin pids gathered from the obd2 port...nothing fancy. The sct live wire has the programs you speak of.
I could get the dynolicious for my ipod touch but fuck that....haha
I wouldnt spend 10 dollars on that garbage
I could get the dynolicious for my ipod touch but fuck that....haha
I wouldnt spend 10 dollars on that garbage
07-18-2009, 08:20 PM
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Re: Peformance calculators????
You had ignition problems with 318/326 on a V6? That's kind of...odd..
Last edited by Fabrik8; 07-18-2009 at 08:23 PM.
07-18-2009, 08:26 PM
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Re: Peformance calculators????
Plug gap was at .045 with 12psi through a supercharger. Running autolite 102's
I have switched to a ngk tr-7 gapped at .033 with msd coil and wires.
When it dynoed it would not let me pull past 5k. 318/326 is low for my setup....it should be at 350 with my cam in it now. Looking for over 400 with the new h/c/i
edit: after reviewing my old dyno datalogs it reved to 5220rpm and spark curve was zig zaging. My cam is speced for the stock heads off the shelf comp cams 210/216 .5lift with a 112 lobe sep(gnx specs). The new cam is going to be something like a 224/230 .55lift 114 lobe sep. plan to run 14psi with a 340nozzle water/methanol 50/50 with an extremelly safe 15* commanded timing curve.
I have switched to a ngk tr-7 gapped at .033 with msd coil and wires.
When it dynoed it would not let me pull past 5k. 318/326 is low for my setup....it should be at 350 with my cam in it now. Looking for over 400 with the new h/c/i
edit: after reviewing my old dyno datalogs it reved to 5220rpm and spark curve was zig zaging. My cam is speced for the stock heads off the shelf comp cams 210/216 .5lift with a 112 lobe sep(gnx specs). The new cam is going to be something like a 224/230 .55lift 114 lobe sep. plan to run 14psi with a 340nozzle water/methanol 50/50 with an extremelly safe 15* commanded timing curve.
Last edited by StarCityKid; 07-18-2009 at 08:49 PM.
07-19-2009, 05:16 AM
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Re: Peformance calculators????
About the only thing you can do with the data you've got is a straight kinetic energy calculation. 3400lb car at 100mph is about 1.54MJ. Average power required to do that in 12.13 seconds is about 170hp. Sorry, I can tell you were expecting more.
Of course, this excludes far too many factors to be the least bit accurate or useful, which is why nobody uses it. Your engine probably has a lot more power than this. If you can find the aerodynamic properties of your car (Cd and frontal area) and know someone with an iPhone or HTC Smartphone with accellerometers, you can get programs that will measure your accelleration curve and calculate your horsepower with reasonable consistancy. By which I mean, you'll still only have a rough guess to your hp (and won't know exactly how much hp it is without a dyno run), but you CAN use this to compare before/after when making mods.
Of course, this excludes far too many factors to be the least bit accurate or useful, which is why nobody uses it. Your engine probably has a lot more power than this. If you can find the aerodynamic properties of your car (Cd and frontal area) and know someone with an iPhone or HTC Smartphone with accellerometers, you can get programs that will measure your accelleration curve and calculate your horsepower with reasonable consistancy. By which I mean, you'll still only have a rough guess to your hp (and won't know exactly how much hp it is without a dyno run), but you CAN use this to compare before/after when making mods.
Last edited by sjfehr; 07-19-2009 at 05:24 AM.