stock vs ta49

[turbo buicks]

i know the stock turbo's "sweet spot" is somewhere around 18-20 psi and that after ~23 psi its efficiency drops and its just blowing more hot air than anything. what is my ta49's "sweet spot" and at what psi does it begin to lose efficiency?

 

[turbosam6]

I would say 24-25 psi would be max in its range, but I'm not totally sure. Might be able to push it harder.

 

[325DR]

When I had my TA49, I was running 12.20's @111 on drag radials with 24psi. I have run as much as 27psi with NO knock, but never at the track. It was pulling very very hard at 27psi over 24. I could tell a difference for sure.