[Diy_efi] Wind resistance calculator - FYI

[Scott Campbell.]

Hugh,

You may enjoy reinventing the wheel, and that is OK, but for us lazy types there is a nice little program called StreetDyno:
http://www.tweecer.com/StreetDyno/

and another one called RoadDyno:
http://www.charm.net/~mchaney/roaddyno/dyno.htm

They do lack your AFR correlation though.

Scott.

Hugh Keir wrote:

> Here is a great set of worked calculations that take you through it step by
> step.
>
> http://members.home.net/rck/phor/06-Speed.html titled The Physics of Racing,
> Part 6: Speed and Horsepower
>
> I have been using them to produce a spreadsheet to calculate BHP, torque etc
> using a datalogged RPM and vehicle speed signal.
>
> The density of air changes with humidity / pressure which I also added to
> the calculations.
>
> I also have a column for AFR from my DIY wideband to look for the best
> acceleration against which AFR
>
> My spreadsheet is 95% finished, I still have some problems with the numbers
> in the dyno sheet.
>
> What have you used to obtain your datalog?
>
> Hugh


_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi