Cast iron Manifold vs Equal-Lenght

Hi before I want to say that my english is not perfect I'm a french-canadien ! To be simple I have an Accord 95 with a forge H22a, a Turbonetic cast iron manif. and aT3T4. My max power climb to 6K, stay to 6500rpm, after fall down dramatically. I know that it's not normal, and I aks myself if it's my manif that it doesn't flow enough? A costum Equal-Lenght could it be better and lay my engine push all the way to the cut-off? If you understant what I wright please answer ***
 

Uhm..
I kinda get what you mean.
Do you mean your torque just drops off power?
Whats your setup, fuel pump, timing control, etc.