Quote:
Originally Posted by sr71bb
Well guys,
I have competed in almost all the groups that are here in my area EXCEPT for NASA so.............
The question I have is their classing rules in with the TIME TRIALS are COMPLETELY confusing.
They mention the AVG HP numbers that are associated with the different classes and TT1 for example infers that you have up to 740HP. TT2 supposed limit is 540HP. The HP is quoted as being the AVERAGE HP .
Well It also says you must upload a DYNO chart with data points every 50 RPM to document your average HP???
So SOMEONE tell me please that is a NASA guru EXACTLY how all of this works???
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Lol, I can relate with what you're going through. It's actually kind of simple but at first it's very confusing.
It works like this, NASA goes by power to weight, so establish that first by going to a shop that has a DYNOJET only.
1. Get a dyno done according to the NASA format here
https://nasa-assets.s3.amazonaws.com...m--3-14-22.pdf
2. Find out what modifications you are running and test them out here:
https://form.jotform.com/drivenasa/s...ification-form
Example:
A camaro SS 1LE making ~ 400 HP weighing in at 3800 lbs(minimum weight with driver). Gives you a power factor of 3800/400 = 9.5 lbs per HP.
Now by nasa rules if your car is over 3750 lbs you get an adjustment of .50 for your weight. That brings you from 9.5 per HP to 10 per HP, which will place you in TT3.
So first find your power to weight, once you have that number apply your adjustments. TT3 is 10 to 1, TT 2 is 8 to 1 etc.
Other modifications tthat will make a big difference are tires you run (Hoosier R7, A7 = 0 mod, street tires will give you up to +1.6)
For your average HP calculation you can reference this filled out form to see what they mean, from a guy that runs ST3
https://drive.google.com/file/d/1XJU...kq1wXa79f/view
You basically take the MAX HP from the 50 increment table, and then go up and down by 250 RPM, 500RPM from that max HP value, use those values to calculate average. Hope I didn't make you more confused. If you reference the google drive link above it will make a lot more sense.