I have an 84 marlen renagede tunnel, It has a berk pump with a ss a/b impeller and a DPS inducer. The loader has been cut back so all four mounting holes are open. The shu has been angle cut so the round bitting edge is 5/8" and the back, just befor the rideplate is 1/2". About 2 degs. the motor is turning 5800rpm.
My problem is, when I floor it it takes off and runs hard, then throws the nose down and scares the shit out of me. The rideplate is up (toward the pump) 2 degs. I have a manuel place diverter on it, all the way up its better, but oviously im loosing alot with the pd up.
Should I put a 5/8 strait shu in it, or a 3/4 back cut one in it. I have two new 1" blanks that I am going to cut to fit and drill to my intake pattern. I dont want to much in it and flip it over, or spin it out on shut down. Has anyone ever messed with one of these boats? LOL I know Its the same as a mantra tunnel.