R33 Big Boost Drop With Profec B Ii?

[WLD747]

Heres the story. Before getting my Profec B II, i use to run a turbosmart gated bleed value which use to hold boost perfectly at 12PSI. Now with the EBC the boost is very strong and quick but runs out of power at 5550 rpm with 0 PSI boost on an aftermarket boost gague?

My mods are: standard turbo and computer. Front Mount Cooler, Exhaust and Pod Filer (under guard).

could my prob be because my wastegate springs are weak? or do i have a bad boost leak somewhere?

Thanks in advance.

AK

[Steve]

did you remove the plastic bung from the NO outlet on the solenoid?

I ask cos i know a guy who did the same thing and had a similar problem. The EBC should hold boost very well, have you checked all your settings are correct - there are a few on the Profec BII.

If it is bringing boost up, strongly, I would be surprised if it is a boost leak.

[WLD747]

i removed all the plastic bits except the one on NC, which is for external wastegates.

did you remove the plastic bung from the NO outlet on the solenoid?

I ask cos i know a guy who did the same thing and had a similar problem.  The EBC should hold boost very well, have you checked all your settings are correct - there are a few on the Profec BII.

If it is bringing boost up, strongly, I would be surprised if it is a boost leak.

[WLD747]

my settings for the profec b ii are:

SET 40%

GAIN 25%

START BOOST @ 0.85

[Steve]

So you have the hole (NC) still bunged? NO and COM plumbed to the boost line/wastegate

if so that is your problem, I couldnt remeber whether its NC or NO, but this is exactly the problem my mate had.

[Steve]

Oh, if you have a look at page 1 (I think) of the instructions, it says to remove ALL the plastic bungs from the solenoid:)

EDIT: also, beware if you have left a plug in, and then remove it, as your boost will run alot higher than you currently have it set, so be ready to adjust down a bit.

[WLD747]

sounds right, im gona try it when i finish work. But could this cause the problem?

[Steve]

yes, refer to my first post:)

the solenoid bleeds air through the NC, or the NO, depending on which way you have it set up. If you have one plumbed to the gate, and the other shut, all the boost pressure will go to the gate.

This is how they work, by pulsing a differing amount of boost pressure to the wastegate, firstly a small amount so that boost builds quickly then once the desired boost has been reached, it will bleed more air so the wastegate stays open the desired amount

[WLD747]

hey steve your were spot on with the plastic plug theory. It fixed my profec b and now it boosts perfectly to redline.

thanks mate your a lifesaver

cheers

Amit

[Steve]

welcome:)

[DJ_L3ThAL]

yep, had the same prob wit mine wqhen i did mine