blow off valve on 1g-gte?

[YLD-16L]

Cheap and reliable - just fit a Bosch one and don't bother plumbing it back in <$50 and your done. Gives you the option to plumb it in if necessary later on.

[rollsy]

sounds like the go!
does anyway know where to get one? repco? super-cheap auto?
i can give them a ring but do i just ask for a bosch blow off valve? or is there different ones?
cheers
rollsy

[stradlater]

I agree. Sure i have a 'fuckin-whooooooosh' atmo BOV, but for the cheap but quality variety, the Bosch BOV will do the job nicely for you. They are a good unit and pretty versatile.


EDIT: You can get them from Repco, they are pretty much known as the 'Bosch BOV'

[TurboRA28]

What is the max boost the bosch units can hold?

[stradlater]

you know, I don't know.. But I have seen around the 12 to 15 mark I think. But I don't exactly know.

[Ghetto-AW11]

From what i have read 14psi, but... i had one on my aw11 with skyline turbo running 10psi and it started leaking 6 months later.

[YLD-16L]

Mine held 21psi no probs. It deals with 18psi as a minimum.

There are a few different models of the Bosch BOV the one you want is Bosch #0 280 142 110 as found on the SAAB 9000T (this is what I run on my car) it is apparently designed to withstand the most pressure in the Bosch range and the valve also has more lift than some of the other models.

EDIT: It is also worth noting that if a BOV is located pre-intercooler (i.e. just after the turbo) and your intercooler suffers from a substantial pressure drop across it then you can end up with the boost opening the BOV:

e.g. turbo makes 10 psi, BOV has a 3psi spring, 4 psi pressure drop across IC = 6psi at the manifold (10psi - 4psi) + the spring pressure of 3psi means that you've got 10psi of boost forcing against 9psi on the back of the diaphragm and the valve will lift. The example is highly exaggerated but it'll give people the idea. Usually more boost = greater the difference in psi across the core and some setups may experience problems. You won't know without measuring or trying it out

Most after market BOVs have adjustable spring pressure or replacement springs, the Bosch BOV is not adjustable in any way.

[rollsy]

Mine held 21psi no probs. It deals with 18psi as a minimum.

There are a few different models of the Bosch BOV the one you want is Bosch #0 280 142 110 as found on the SAAB 9000T (this is what I run on my car) it is apparently designed to withstand the most pressure in the Bosch range and the valve also has more lift than some of the other models.

EDIT: It is also worth noting that if a BOV is located pre-intercooler (i.e. just after the turbo) and your intercooler suffers from a substantial pressure drop across it then you can end up with the boost opening the BOV:

e.g. turbo makes 10 psi, BOV has a 3psi spring, 4 psi pressure drop across IC = 6psi (10psi - 4psi) + the spring pressure of 3psi means that you got 10psi of boost forcing against 9psi and the valve will lift. The example is highly exaggerated but it'll give people the idea.

Most after market BOVs have adjustable spring pressure or replacement springs, the Bosch BOV is not adjustable in any way.

okay now im confused! lol
i will be mounting it after the intercooler.. 18psi minium? i will only be running standard boost.. so 9psi i think.. so will it still work?

[YLD-16L]

okay now im confused! lol
i will be mounting it after the intercooler.. 18psi minium?

Mine deals with 18psi as a minimum on my car i.e. I have my boost set to 18psi all the time Sorry for the confusion

9psi will be not a problem at all.

[rollsy]

oh ok! yep makes sense now! lol
cheers
rollsy

[The Witzl]

edited topic name to clarify the thread.

Good info from mr guns here.... Ive personally run one of the bosch valves mentioned on a 4agte with ~12psi, worked fine.

It is also a good idea to plumb it back to the intake between the AFM and turbo so that you dont get the mixtures going to shit on gear changes. There is a few threads about this on these and the old toymods forums.

[Cuzzo]

how big diameter does the pipe plumbing back have to be?

[YLD-16L]

how big diameter does the pipe plumbing back have to be?

From memory the hose fitting on the BOV is 1", most aftermarket plumb back BOVs are also generally 1".

How big does it HAVE to be though is debateable. I wouldn't step down from the fitting size on the BOV though.

[kingmick]

hi guys,
ive got a 1ggte into a hilux and am doing the intercooler piping atm. and i would like put a blow off valve in it at some stage. has anyone got a picture of where i should put it? and at the moment i cant really afford to buy one.. would it be much harder to put it in later? or should i do it now?
cheers
rollsy

If you PM me on saturday to remmind me, ill take a picture of my one when it gets back!

[love ke70]

i still say dont run one if your cash strapped.
atmo on stock ecu = fuxxord mixtures on gearchanges

and yeah, atmo venting crankcase, uncovered pod and atmo venting bov...defect? whats defectable occifer???
it was all legal, then i uggraded turbo