blow off valve plate

[drifter17a]

Hi, 

 

I think my blitz is leaking and have seen many people saying they are known for leaking 

 

I am saying this as i get random boost around 14 psi and sometime it goes to 16-17 but other times stays at 14-15

 

prior to tunning had the same problem as it was reaching 6 psi where it should have been 9 psi . even worse it was on 1-3 psi if the car was off road for 2-3 month which lead me to believe blow off valve internals needed a bit of drive ...

 

anyway I could be wrong and to test it, I am buying a new BOV,. greddy 

 

i have looked at the mounting plates and it seems to be the same for blitz and greddy( see below).

 

is there a standard between the BOV so they have have same aparture / hole size so I could use my blitz valve ?

 

also would you use gasket maker for the connection between pipe and dump valve ?

 

blitz

 

https://www.ebay.co.uk/itm/Blow-Off-Valve-Adapter-Fits-Blitz-BOV-For-Nissan-Skyline-R32-R33-R34-GTST-GTT-BK/273349837940?epid=24021312519&hash=item3fa4eb8474:g:yBUAAOSwnEtbRbzU

 

greddy

https://www.ebay.co.uk/itm/401678163818?ViewItem=&item=401678163818

 

[GTSBoy]

What do you mean it looks the same!?

The Nissan side of it is the same.  Of course it is.  The BOV side is completely different.  Look at the bloody bolt spacing!

And paper gasket.  Buy gasket making paper and cut a gasket out.

[drifter17a]

will do , do you reckon my symptons sounds like a bov leak ?

[Ben C34]

Just block off the bov and see what happens.

[drifter17a]

can't as haven't got anything to block it off in addition to potentially damaging turbo due to pressure!

[Ben C34]

10 minutes ago, drifter17a said:

can't as haven't got anything to block it off in addition to potentially damaging turbo due to pressure!

You don't have a coke can?

I'll ignore the turbo pressure damage concern for the most part, but I will guarantee doing it for a test won't cause an issue. 

[drifter17a]

lol ok

[drifter17a]

changed to greddy and i was very happy as boost built to 17 psi but that was short lived as it soon dropped to 15.4 psi again as soon as car was hot.

 

need to speak to tuner

 

i spoke he is using air temp to adjust fuel and boost so don't have too much boost when hot

[GTSBoy]

Don't speak to the tuner.  Find one who has a brain. He shouldn't be using any of that horseshit at 17 psi!

[Dose Pipe Sutututu]

Where is your boost reference? Inadequate IC setups will often lead to boost not being maintained after heat soak.

However, if you were to take your boost reference post IC you kind of masks those symptoms, another reason factory Nissan engineers took a boost reference post IC as well.

[drifter17a]

What is ic? Intercooler?

 

mine is on intake manifold

Edited April 18, 2019 by drifter17a

[Ris4rocket]

5 hours ago, drifter17a said:

What is ic? Intercooler?

 

mine is on intake manifold 

yep, kinda common reduction
I do not understand what's the fuss about it. just put ur blow off in front of the throttle and that's it, everything will work perfectly