I am currently chasing a goal 300 hp and an a high 11 with a d16a6 in a 89 hf.

Does anyone know if this has been achieved with an hf/std/cx manifold before? Or if its possible.

My current understanding of turbo manifold design is that equal length tubular designs only cooridinate pulses to spool earilier. The rest comes down to volume and flow correct?

I would also like to keep a cast manifold simply for durability. I've seen and read about way too many cracking/breakign stories with tubular units.

If ya'll could provide opinions on the feasibility of this goal I'd greatly appreciate your input.

Tony