Qtr mile or ENGINE dyno results

:burnout:

Uhcoog1 said

Looks like you are right - the wallace uses flywheel hp. It appears to use the Patrick Hale formula that also was used for the old Moroso speed slide. It's the same formula all the other internet hp to 1/4 calculators use, just a lot of them give the same output as the wallace when using rwhp, not fwhp.

I couldn't find anything definitive about if patrick hale built the formula for engine hp - but I'm sure that's the case.


Emil - what does Mike's duster trap? And what's the weight of the car with driver?

Click to expand...

I thought we were gonna disagree - but glad you see it differently.

Fwiw I agree that driveline will effect MPH....but not so that it'll show 50hp variation.

You're also right about Moroso and Hale.

Where most people come unstuck with these calculators is they use the "ET" variable to calculate their Hp - As discussed....ET is so variable, when Huntingdon, Hale and Fox developed their formulas, the ET factorial was by far the least consistent

So plotting for a formula, the hardest factor to average out was ET.

Hence, when tuning for power - we use mph and weight......NOT ET and weight.

Hope Im not telling you something you already know...but for others benefit......

If you want to read about WHY these calculators work on Engine HP - this link is a great read.....especially the first few paragraphs.

Dont let the Math put you off....the most important stuff is right at the start.

http://www.stealth316.com/2-calc-hp-et-mph.htm