R33 Boost/power Loss Problem.

[tmc_2]

Hi guys,

I have just purchased my second r33 turbo. The fisrt one had every problem you could think of so i am acustomed to the world of skyline with problems.

I have this stragne problem. my r33 has a dual stage turboXS boost control with swithc in cabin, podfilter, zorst and forged aftermarket pistons, GFB dual BOV .

When i florr it on low boost 7psi it revs out first strong then hit secodn and it dies in the sarse, the car has no pick up and o nthe boost guage it does not seem to be baking boost.

Now the same thing in high boost and it goes hard as it should.

I took apart the first stage of the boost contorler and their is no problem with that, the bov is calibrated fine.

I am guessin git has something to do with the turbo? maybe a sticky waste gate flapp? any ideas guys?

[Munkyb0y]

my mate's s15 does the same thing. also has 2 stage b/c with in cabin switch.

his makes strange noises at 8psi, but it's all good at 11psi.

It's got me fked. I suggest the b/c may be the issue.

Will let you know if he sorts his issue out.

[tmc_2]

I doubt how the boost control caould affect this, given the effects of connecting the intake pressure pipe directly to the wasste gate actuator then also testing it with out the pipe connected should give u an idea of waste case scenairo of if ur boost controller was blocked or leaking too much air. this leaves me to guess its not the boost controler but the actual waste gate actualor or waste gate flap?? does that make sence?