AHFS One more Time

[RPinoski1]

Hi Bruce,
Are you refering to the correction factor back to sea level for each particular track or some other factor? I don't see any other factors listed except the one below from the NHRA site.

NHRA ALTITUDE CORRECTION FACTORS

Stock & Super Stock

Convert to Sea Level

Track Name Alt ET MPH
Boise, ID 2700 .9679 1.0339

This was copied from the NHRA site.

Just trying to understand the AHFS. It appears the AHFS has a few gray areas for interpretation.

[Bob Mulry]

Hi Rich,

Let me take a shot at it.

Lets decide to take the generator out of the back of your race car and step all the way down on the gas pedal to go fast..........

You take your car, a SS/HA with a10.90 sea level index and you go to a LODRS at Las Vegas and run a 9.40 on your ET slip which would be a corrected back to a Sea Level run of 9.171. Three things would happen first you would get the SS/HA record at a 9.171, second you would get a 3.25% horsepower increase for running a 9.40 on and 10.90 index which is 1.50 under the sea level index and last but not least there would be people looking to kick your butt for more horsepower on the 327.

Later in the year, after all the smoke clears from your new record, you go to decide to go to a LODRS race at Denver and run a 9.80 on your ET slip, which is .1.10 under the sea level index. Two things would happen, first you would reset your old record of a 9.171 with a new record of a 9.090, second you would NOT get a 3.25% horsepower increase because the run was only 1.10 under the sea level index and not 1.40 under.

This also applies to National events, which have an Altitude Correction, with regards to having to run more then 1.40 under the sea level index to get a 3.25% horsepower increase.

So take out that generator and have some fun,
Bob