Did I calculate this right?

[BlueBeemer]

Just bought a new car, switching from German machines to Japanese, and thinking about running ST3 next year.

 

I calculate it this way:

 

Non OEM aero = -.5

255 tires = +.4

weight 2650 = -.3

 

Total = -.4

 

Soooooo I can run ST3 with a max 9.4 power to weight ratio, correct?

[sperkins]

Yes as long as there are no other modifiers like AWD, FWD etc. to consider.

[BlueBeemer]

So my car can now run in ST3 at 9.3-1 ratio???

 

Non OEM aero -.4

255 tire +.3

2650 -.2

 

Also.........if running a NON dot approved tire (slick) is the same +.3 as a dot approved tire, why wouldn't you run a full slick?????

[BlueBeemer]

Nevermind, just found the ST excel calculator. Great tool!

[kbrew8991]

Why wouldn't you run a full slick?????

you can get that credit for a narrow/narrower slick, but, you also have to take the hit for non-DOT construction tire as well.

 

Since they come in all sizes it could be a net of:

-0.7 for big slicks (-0.7 for construction, +/-0 for size)

-0.4 for medium slicks (-0.7 for construction, +0.3 for size)

+/- 0 for narrow slicks (-0.7 for construction, +0.7 for size)

 

also just try and beware of confusing RAW hp/weight and Adjusted hp/weight. They're two different animals Like the difference between a cow and a steak on the plate.