Strongest 3L N/A is David Zs old motor with the touring car 2.5L heads/cams..now in a cougar (jjennings) making about 250 FWHP and 220+ torque IIRC.
Strongest 2.5 N/A is probably Demon SVT who made 187 FWHP before his headers/extra UIM porting/secondaries removal...he picked up over 2 MPH trap speed with these additions suggesting he is close to 200 FWHP (all bolt ons/no internal work). Stll more to do too..true duals, electric H2O pump, bigger injectors, light flywheel, more tuning etc. I would bet that 205-210 FWHP (250 crank HP or 100HP/L) possible without cracking the motor!!
We are not counting pure race cars here BTW..
