Wastegate Flap Hitting Split Dump.

[B0oStEr]

I'm trial fitting a split dump to my 2530, before they both go in my car, to see how they fit up.

At the moment the flap hits the dump flange limiting it's movement but it may be opening enough.

Can anyone tell me how many degrees the wastegate shaft needs to rotate as the flap fully opens?

[gtst25]

Guess it depends on how little boost you want to run.

With my 2835pro s kit the wastegate hits the dump too which I thought was a bit dodgy but I've never tried to run less than 15psi so I wouldn't know how it will go on lower boost settings.

Shouldn't be a worry although with my old stock turbo setup with custom dump the wastegate could open as far as it wanted.

Is your dump a HKS one?

[gt-t_r34]

its not one of those china copies is it? ive heard a few people conplaining about those hitting the waste gate.

[paulr33]

i would be worried that if the flap can make contact upon opening that theres a chance it could get stuck open somehow, and then youll drastically loose pressure everywhere

[B0oStEr]

It is the same combination split dump/ frontpipe that batmbl sells.

It seems to open about 60 degrees before it hits the flange which may be further than the actuator allows it to open so I think that it will be ok.

My main concern is that the flap partially obstructs the wastegate outlet hole in the flange but if this was a problem then I doubt HKS would use this design as they do.