Originally Posted by Phillip J. Fry
id take real over paper any day. was giving my opinion that doing this isnt the same as a real dyno so dont waste too much time.
whats your trap speed and 1/4 time?
A real dyno typically guesses your gear final ratio by using RPM pickup and roller speed. With the transmission slipping it throws them off. Here we know our final ratios from factory specs and tyre size.
Originally Posted by RooTBeeR
Yeah, i'll try to get some pulls on my way home to convert.
My rpm end up being way off for some reason though when I do the conversion.
As do mine sometimes. It's because it's slipping. Use a smaller/larger tyre size until the RPM at redline is closer to the real one. THe logged RPM should be higher in the midrange. Remember to copy and "paste values" in excel over the original RPM
For those who don't know how, you can use Airboy's spreadsheet
to make it easier.
1. Open spreadsheet,
2. Import Data -> select your log file
3. Click Filter WOT (Data)
4. GO over to acceleration sheet, Clear data
5. Over the yellow section, enter gear ratio to get Engine to Speed number (mine was 110, yours prob 99.9 USDM ratios). Enter this number in the white section, cell N9. Enter the weight and your weight also.
6. Check the Auto option in the green box. Then click clear data, click grab headers, click get data, then click calculate acceleration.