temperature variant 70 degrees vs 100 degrees
07-26-2007, 05:45 AM
#1
temperature variant 70 degrees vs 100 degrees Just curious about an estimate. How much do you think the SAE corrected hp/tq numbers ddifference would be on the DynoJet for the car in my signature below. The numbers shown in my signature are for dyno numbers recorded in early Spring of this year. The temperature was about 70 degrees.
Yesterday, the car was re-dyno'd in 100 degree weather ... just want to see what you think the hp/tq difference should have been.
Yesterday, the car was re-dyno'd in 100 degree weather ... just want to see what you think the hp/tq difference should have been.
07-26-2007, 07:02 AM
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It should be within 5 hp. The corrected factors take into account the temperature, pressure, humidity, and altitude if setup properly. The only reason I say 5 hp is because there may be some error in the dyno or calculation. Remember nothing is perfect there will always be some variation. I am sure though someone will say that they tend to make more in colder weather because the correction works better when scaling down then up.
07-26-2007, 11:26 AM
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Hey Jeb:
Like Sigforty stated, SAE correction formula would account for the temp/humidity differences, and "theoretically" should be identical.
Now your "uncorrected" HP would be ~3.2% less. For every +10f deg rise, you lose ~1% power, so in reality that 30 degree rise in temp is costing you about 12-13 HP/TQ in "real" power.
Hope that helps...WeathermanShawn..
Like Sigforty stated, SAE correction formula would account for the temp/humidity differences, and "theoretically" should be identical.
Now your "uncorrected" HP would be ~3.2% less. For every +10f deg rise, you lose ~1% power, so in reality that 30 degree rise in temp is costing you about 12-13 HP/TQ in "real" power.
Hope that helps...WeathermanShawn..
