Originally Posted by xr2wishy

well i believe there is a tear in the diaphragm in the external wastegate, i blew down the limiting pipe earlier and it didn't resist much, i set the EBC to zero and it's holding 1BAR just fine, no surge very strong power, the cam changes have actually made it pull better too, so worth a bit of effort in that respect, although a little laggier by 100rpm or so.

voltage is mega erratic though, but put some lag factor into ecu to help smooth it's operations out a little. there is an electrical gremlin that has plagued me for a long time, somewhere in the old loom is a problem, but that could be a goose chase and a half.

in the instructions for the gizzmo it said to start the duty low and set the gain as high as possible and in most circumstances this is the highest setting. or words to that effect, so that's what i did and not had issues with surge until this turbo was fitted (obvs a wastegate issue though in this case now).