Theres two issues here -
1st - does WALLACE quote RW 0r FW HP. ?.Heres a challenge for you - pump in the avge mph and weight of a stock 6.1 LX car of 107 mph @ 4300 lbs and see what HP you get......Im betting it will be the quoted factory Engine hp and nowhere near rwhp. :)
Most all calculator's use Flywheel horse power (Wallace does).But you forgot one important variable, that is altitude.I have to ignore that for my area, because attitude here is 2200 +. NHRA adjusts our clocks to 10:05 for the 9:90 class. When I use calculators, I ignore our altitude, and calculate it at sea level. Simple, we run 3 teethes slower here the sea level.And about 1-2 MPH slower.
But to be frank - I dont want to argue about calculators - the one I use came in exactly as per my Engine HP using weight/ Mph....so I dont think this debate has a future..... ;)
No argument from me, I just use them for approximates anyway, I sure wouldn't want go bragging to anybody how fast my car might be based on a calculator print out.
The point I was trying to make is, it does work for me, and isn't all that far off.
2nd - By corrupt - I meant that drivetrain losses vary from car to car - so why would I use Rear Wheel HP as a guide on whether my car is down on power?
Sorry, I should have mentioned the calculation numbers I use and been more clearer on RW vs FW HP.Yes, you are correct,there is no rock steady calculation to convert the numbers from RW to FW HP. But, if you know your dyno, have ran some cars using the real world weight,ET & MPH numbers, you can get a real percentage to work with. For my friend/sponsors dyno (which is a Dyno Jet) it is 28%-30% for my cars (his dyno is stingy).But all my cars have loose 5500 converters, where as my friends stick 451 is closer to only 18- 20 % or less.But it does cross over pretty close, and Wallace calculators are real close. Even when converting 1/8th to 1/4 mile.
AS YOU SAY - unless I can get quoted engine dyno HP....Track MPH and weight is my best tool which is why Im asking for examples -
I agree, but I also wouldn't discount Chassis dyno numbers either.Engine dyno numbers can be manipulated too. Real world is going to be the true answer, all the rest is just, well entertainment and dreaming in my opinion!
Unfo yours is so damn quick its not a lot of help ! LOL!!