last time i had the car dyno'd i forget to tell the guys at the shop to use SAE, so they had it on STD.....weather conditions weren't really favorable so i was just wondering if there's a way to convert to SAE given all the variables and STD factor.....this is just to satisfy my own personal curiosity, nothing of grand importance though
General Zod
Pooperscooper said:![Image]()
where: cf = the dyno correction factor
Pd = the pressure of the dry air, mb
Tc = ambient temperature, deg C
The pressure of the dry air Pd, is found by subtracting the vapor pressure Pv from the actual air pressure.
Edit: I have no idea what that means.
Physcrometrics...Pd=Pv-Pa
Those numbers differ depending on your altitude and %RH and temp (amount of water vapor per kg of dry air). I don't have my book with me now, it is at school. I'd be able to tell you those numbers to a close approx if you can wait till early next week.
Joe
ok thanks Pooperscooper and whitecoug
whitecoug, i already have the correction factor....1.08....that was on the dyno sheet.......so calculating it is not the problem.....is it just a matter if simply multiplying my numbers by the CF to get SAE numbers? or is there some other calculation you need to do with the CF to get SAE?..that's what im wondering
whitecoug, i already have the correction factor....1.08....that was on the dyno sheet.......so calculating it is not the problem.....is it just a matter if simply multiplying my numbers by the CF to get SAE numbers? or is there some other calculation you need to do with the CF to get SAE?..that's what im wondering
There is APPROX 4-5% difference between SAE and STD corrections on a dynojet. Take dyno numbers with a grain of salt.
A-Train
A-Train
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