I have a friend with a whipple cobra, I wanted to get some input for people who may be more familiar with a 2.3's capabilities. But anyway, with an aggressive street tune, how much power/torque to do you think that a 2.3 whippled cobra (stock motor) pushing between 18-20 psi on a 93 tune could make?

My guess is 610/560.

 

More or less, you are correct....

 

yep somewhere a little over 600 hp is possible.