Calculating HP and Lbft

[CIVICUK]

Does anyone know of a formula to help work out what my current HP or lbft torque output my car is running at?

Im self tuning and wondered if i can produce an excel document by using my flash pro logging data i.e AFM g/s or something so i can predict out comes say if i changed my AFR target or added a bigger maf housing

If anyone knows of a software or excel document i can use that would be great!

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[ivanCivix]

I used virtual dyno. It's quite accurate and useful especially to look for changes and not absolute numbers

 

[hobby-man]

I used virtual dyno. It's quite accurate and useful especially to look for changes and not absolute numbers

How accurate is it? Have you done a virtual dyno run then a real dyno and compared?

 

[ivanCivix]

I didn't.

But if you take one of the base maps you’ll see similar numbers like those reported in the real dyno.

Anyway it's easy to use, all you need is a wot log.

 

[CIVICUK]

I used virtual dyno. It's quite accurate and useful especially to look for changes and not absolute numbers

I did use this one time but my version stopped working and i cant find a link to download it from.

Do you have a link at all ?

 

[ivanCivix]

https://barnhill.bitbucket.io/public/setup.zip

 

[CIVICUK]

https://barnhill.bitbucket.io/public/setup.zip

Thanks i have created a car profile for my non si and ive uploaded a csv of 3rd gear pull but its asking me to pick a gear.. if i pick 3rd gear it comes out like 60whp!

, and also work out the barometer ... do you know how this is calculated?

 

[ivanCivix]

I guess your car profile is wrong. Send me the csv and i will try it tomorrow. Do you have 17 inches wheels?

 

[CIVICUK]

I guess your car profile is wrong. Send me the csv and i will try it tomorrow. Do you have 17 inches wheels?

I guess your car profile is wrong. Send me the csv and i will try it tomorrow. Do you have 17 inches wheels?

thank you. i have 18inch rota alloys 235/40/r18
i weigh about 200 lbs if need this.

 

[ivanCivix]

I had to clean the file you provided. I suggest to start logging when you are already in the 3rd gear if you don't want to manually clean the file.

Anyway this sounds like stock tune numbers. Is it correct?

 

[CIVICUK]

I had to clean the file you provided. I suggest to start logging when you are already in the 3rd gear if you don't want to manually clean the file.

Anyway this sounds like stock tune numbers. Is it correct?

Thank you for clearing up the file to only show 3rd gear i wasnt sure on how to do this.

Yes so i only have base calibration available for my ecu so i copied tables for the +3psi calibration and decided to give this a run.

I could only get to 5000rpm on my pull and peak i think is 5500 so i think i was hitting 18psi of boost, is this correct?

So does that make my horsepower at the crank as 197.8hp ?

 

[ivanCivix]

You were WOT from 2500 to 5300 rpm and hit 18.3 boost max. If we consider a 15% loss, we can say that should be around 198 hp. I may suggest to remain wot till 6k for more accuracy around peak hp

 

[CAPTS]

mind to share the gear ratios?

 

[ivanCivix]

You can easily find gear ratios online, keep in mind that 2020 version has slighty different values.

Anyway tomorrow i will post all my configuration here. Feel free to write if you think some value is wrong

 

[CAPTS]

Here's mine. need to find more accurate drag coefficient, frontal area & the appropriate ratios for CVT & final drive for MT those figures are easily available. the figures are quite close to actual.