When ET and MPH Are Not a Match?

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Another twist to it all, which is normally the opposite of most cars that could do with some improvement on the chassis is if your car 60ft's real good, like say a 1.26 60 on a 9.90 your probably only gonna go in the 129>131mph range and will throw your fwhp mph/weight calcs out. On a lesser chassis that would be in the 135+ mark and a 60 in the 1.38 range, thats the only time the Wallace calcs aren't as accurate as they were based on your average good leaving car.
 
Agree with JBurch . there is a formula in the MP books called "Minimum et for a given speed". What they are saying e.g. If your car runs ,say, 115-116 mph and your et is 12.50 , you have a problem . Based on a chassis that is 100% efficient .

You see numbers similar to that on modern muscle cars( Challengers, etc) that are heavy with not much gear.
Absolutely nothing is wrong, they were engineered that way. By nature they are heavy and leave soft, and make thunder( MPH) in the backhalf.
Likewise you will see stock/ superstock stuff that will run( as an example) 10.50 at 120 mph.
Nothing wrong, just the available/ limited horsepower is being put to fully flogged out use.
 
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