Stock BOV Leak-Fix Mod pics.

[Cubes]

Some have reported good results some havn't.

I've decided to do the mod again since I am running a bit more boost up in the higher rpm's due to my bodgy wastegate mod that reduces the wastegate travel. I'll let you all know if it makes boost in the higher rpms as previously the way the wastegate was setup it would hold boost perfectly.

Theoretically it should creep boost the higher the rpm's go IF the re-circ leak was causing some boost drop. This is only the case with the way I have setup my wastegate hence reduced travel so boost is forced to be made.

I recessed the hole a little so the top of the screw would sit flat. As not to accidentally lift the bov on one side hence leaking out the side of the gasket.

The screw I used was a good ol' short stubby computer case fan screw.

While I was there I checked the piping to see how coated with oil it was.

Suprisingly after 160,000km's (90,000km's of hard 1bar+ boosting, currently 1.1bar 16-17psi) its all pretty clean. Slight bit of oil on the bov its self however the piping is rahter clean. Well compared to 95% of the other R32's I have seen.

[Cubes]

I have noticed the following since the mod:

1. Boost is definately much much quieter. Similiar to a car that has a stock airbox.

2. Appears to feel like it has a little more guts down low.

3. Boost appears to be a little lethargic when first starting to make boost - this could be due to not hearing the psssssshhhh as boost comes up.

4. This mod only appears to be of benifit when running 15+ psi.

5. Boost does creep up like I thought.

6. Constantly hits boost cut now Time to fiddle again.

7. Changing from first to second when accelerating moderately some times is a little rough.

Think thats it.....

[sweetr33]

no, i did this mod along time ago, i run 13psi and noticed the difference straight away. Boost to me came on harder and the blow off valve venting sound changed to a harsher noise good mod.

[Cubes]

Boost does come on harder just the initial boost build from 2-3k which is around max 5psi unless i'm giving it stick.

How are the aftermarket re-circ bov's setup? Do they have this recirc bleed type hole?

[sweetr33]

to be honest i havent a clue champ. I have blocked that hole off but now am having trouble with the bov opening by itself on full throttle just from to much pressure in the intake pipes. Seems to be releasing when it feels like it

[Jay95R33]

How are the aftermarket re-circ bov's setup? Do they have this recirc bleed type hole?

I don't think they have Joel, well the TurboSmart one that a mate has got hasn't.

I've always wondered if a aftermarket plumb back would give the same feeling as this BOV mod does....

J

[rev210]

the mod doesn't make your car any faster unless it affects the boost holding characteristic.

[Cubes]

It definately does hold boost easier up top now.

I've had to back the boost off so it doesn't boost cut.

I didn't notice any difference at the lower boost levels though (13psi @7000rpm) as it would hold 13psi at 7000rpm easily anyway.

The problem began when I started to try and hold 1bar+ up to 7000rpm.

As I said previously I elongated the wastegate holes in order to reduce the travel of the wastegate hence forcing it to hold boost. So obviously there is a little to be had by stopping the constant re-circ with the stock bov.

[sweetr33]

yours holds 13psi at 7000rpm???? Mine will go to 13 then bleed back to 9 by 7000rpm

[Cubes]

Yer the RB20t wastegate is a tougher wastegate (stronger spring).

When I had the VG30BB wastegate on it she would drop boost to around 9-10psi like yours.

The RB20T stocker wastegate with exhaust is 10.9psi. Well mine is anyway.