Quote:
Originally Posted by JANNETTYRACING
There are a multitude of Correction factors across the globe.
A correction factor only exists to give a standard day for your Region, so when you test in the winter or test in the summer you get the same numbers.
Superflow has been the go to Dyno testing equipment for all forms or racing for over 30 years and has established STP as correct for the US North America.
We Measure Actual numbers with a Torque sensing strain gauge then correct for the Day.
Our actual number and corrected number are within 1% on the day I ran the test, I don't consider 1% an inflated number.
If anything SAE is overly conservative showing Low numbers compared to Actual measured HP and TQ.
STP is backed up by Track results time and time again, I have collected data from this dyno and backed them up at the track for over 13 years now.
STP numbers are as REAL world as it gets.
Many Dynojets read 10% too high regardless of what correction factor they apply.
This is why you see so many high dyno numbers with Low MPH at the track.
I am also collecting Air flow data that also backs up our Dyno numbers, 1 lb of air per minute produces 10 crank HP.
This car is flowing 46.65 lbs of air per minute, X 10 = 466.5 crank hp.
It is also pulling a vacuum above 4000 rpm so a CAI Cold air kit is going to add some power for sure.
Anything else I can answer for you feel free.
Thank you for asking many people want to know.
Ted.
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Nice detailed response but it's unreasonable for you to say it doesn't overinflate numbers because you back them up with track numbers. How can you claim to know what a track time should be based off a given whp number?
STD/STP are always higher because it is based off a colder temp, 60* iirc. Why would you base the HP numbers at 60 degrees when most summer street tires start to lose their grip at that cold temp?
SAE is based off 75 degrees and while it doesn't give users the warm fuzzy feeling of a higher number IT IS the standard of automotive manufactures.