I know what you are talking about. Got the same problem with mine. It is at Lrp now for repair. It acted exactly the same way you describe, right out from the box.
Hope I get a functional one back so I can try what I aimed for.
BTW, I run a Futaba 4PK and still got the problem.
For the moment i have a Speed passion LPF and it is soooooo sloooow. I get past easily on the straight from other guys running 7.5t with Lrp speedos and what not.
