The point that’s trying to be made about the converter is........ the OP is basing the engines power output by the cars performance data.
Many things affect the cars performance other than the power output of the engine.
The converter being probably the next biggest player.
If the converter sucks(and many do), the cars performance will be way off, making the power output appear to be low.
This is where having dyno tested the motor is probably the most valuable.
If the motor made 550hp.......... but the car is running 450hp ET’s........ you know where not to spend any money.
On the motor.
Of course, without the dyno....... the builder is “assuming” that magic combo of parts “should” make 550hp....... but without testing, who knows?
Maybe it’s actually only making 450hp(or 475, or 500, or 600??).
The question as to whether there is sufficient valve spring load to maintain valvetrain control to the RPM they’re turning the motor would have been answered as well.
