Ok, this is mostly hypothetical. I didnt look up specs on the 2011 mustang but just say its exactly the same weight as my 2005 gt and the stock engine for the 11 gets 412hp and say I got a supercharger that put me exactly at 412 hp. which would be faster considering they have the same hp/tq and same weight but one is supercharged and one is not, or would they be the same?and by faster i mean 0-60, 1/4

 

They would be the same

 

The supercharged car would be faster IF you assume good traction. This is because the torque curve is flatter and more area under the curve = faster times. Peak number don't mean that much and torque is what gets a car moving (at least at the stock Mustang weight). Area under the curves is what matters.

 

+1. Assuming very, very same conditions, such as tire size, gearing, traction/suspension components, then the supercharged car would perform better.

"Area under the curves is what matters." Ugh, thought I was done with Calculus for the day.

 

+2 with all the times PEAK hp numbers are thrown at us we neglect the entire rpm band.

 

so would the answer be the same if say instead of 412 hp, the 2011 got cams and all bolt ons and just say it moved to 475 hp and you made the supercharged engine 475 hp and everything was the same conditions would the supercharged one still be better? (I'm just picking random hp numbers and gains)

 

and you also have to remember the 412 is to the crank, whereas with a supercharger you are getting 412 to the ground, so the super would be faster

 

The Torque curve on a Supercharger will be much flatter than N/A 5.0 .. I say the S/C car will be quicker.

 

The details will matter.

It's still a matter of finding the curve that has more area under it for the rev ranges that you use in each gear.

If you can provide better "guesses" with respect to peak torque, peak HP, and the rpms that they are developed at, I might be able to come up with something using an acceleration spreadsheet (it has a curve fit subroutine that writes a torque curve formula, which seems to work reasonably well).

It would probably be best if you use HP and torque curve shapes that are similar to dyno charts that people have posted, for both NA and the same form of FI that you have in mind to estimate the rpms.


Norm

 

All you do with cams and [most] bolts ons (Intake, exhaust) is give the motor more power at the upper rev range, so actually you're making the distance between the two cars even greater because as said, the supercharged motor will just have more torque at the low-mid range.