Diesel Turbo Engine

[paiseh]

Hi all,

 

I would like to ask whether a blow off valve can be fitted onto a Diesel Turbo Engine Van.

 

P/S: Pls do not flame me. Im afraid to be flamed. We could share some infomation which u had never known.

 

Regards, Paiseh

[Guest nE0]

What are you driving, a Vito?

 

It already has a blowoff valve to regulate boost pressure, all turbo engines must have one, or it will just blow up.

 

But it vents into your exhaust, muffled by your silencers. You can try modding it to vent straight into the air, pssshtt!

[paiseh]

a 1.9L manual 6 speed renault Passenger van.

 

how abt an external blow off valve to create the sound instead of modding it like those petrol turbo engines?

[kurarensu]

hi there,

 

from what i noe hor.. BOV(blow off valve) can be fitted into any car.. when u klutch in the sound will come out.. even for non-turbo car can be fitted wif.. but ppl will sae u act.. btw bov got may kind like HKS, MUGEN... shld be abt 200+ or 150+ if i not wrong.. forget liao unless u wan fierce fierce kind like GTR oso haf.. lol.. but dat one u nid 2 mod abit.. if nt ur exhaust tone nt nice

[Andr3w]

bro..when u fixed a BOV u need a Boost controller.it regulates ur boost psi.n can try changing ur Turbo waste gate.no point doin all tis wit out changin ur waste gate..juz my 2 cents.

[kurarensu]

btw there's BOV for bike s well? saw in 1 video b4.. lol.. sounds interesting n cool.. where 2 buy r? i like cosmestic mods..

[gssiong]

only TURBO-charged or super-charged engine need a blow off valve (BOV) and it works only on turbo-charged cars..

cos the 'pssht' sound need air to generate..

 

I've seen some accessories shop selling BOV for Normal Aspirated (NA) car..

its an electronic equipment with kind of buzzer that creates the 'pssht' sound each time you shifted the gear..

 

BOV basically got 2 types, original factory fitted is called 'closed loop', which vent the exessive air back to inlet manifold..

as for the 2nd type, its what we normally seen/heard on the road with pssht pssht sound.. it vent the exessive air to the atmosphere instead of going to the inlet manifold..

 

any turbo-charged (regardless of petrol or diesel) can be fitted with after market BOV.. provided you have proper piping fitted too.

 

BOV is nothing related to boost controller too.. I've using various type of BOV without installing any boost controller..

 

this link is quite useful: http://www.machevo.com/doineblva.html

 

 

got this from other website:

Blow off valves

This is the best part of turbos, in my opinion. There are many types, shapes, sizes, and sounding blow off valves. Some make lots of noise and some make very little. What you need comes down to personal preference, the sound you desire, and your horsepower goals. There are two main types of blow off valves: the ones that vent to atmosphere which make the loud noises; and the ones that recirculate the air back into the system, which are often called wither diverter valves or recirculating blow off valves.

 

Atmospheric blow off valves sound great and let everyone know you are turboed (which is great fun). However, they can be bad for performance and your engines health. When you make boost, the mass air flow meter is telling your ECU that a specified amount of air is about to enter the engine, so it adds a certain amount of fuel for that air. When you blow off to the atmosphere, the air is released from the system. Then you are left with all that additional fuel that was supposed to meet the air that’s not there. This leads to an overly rich condition, which is not good for performance because it can cause the engine to stumble, or even backfire. Also, when all that fuel is dumped into the exhaust, it can deteriorate the catalytic converters, and they can be destroyed which will set off a check engine light and cause degraded performance from a clogged exhaust. The only downside to a recirculating blow off valve is the lack of sound if you desire such a thing.

 

Now down to the sounds. There are a bunch of different sounding blow off valves on the market. The best way to sample the sounds is to go to http://www.blowoffvalves.com . They have videos and sound clips of the more popular blow off valves. Don’t forget that you will need the appropriate flange to weld to the piping. Also, you should have a basic understanding of how blow off valves work and why you need one. When you hit the gas, hopefully you make boost. When you let off the gas, the throttle body plate closes and the air compressed inside the pipes has to go somewhere. The path it would take without a blow off valve is out through the turbo (which it just came in from). This would be acceptable if it wasn't for air traveling backwards through blades spinning at thousands of RPMs. This is known as turbo flutter, and the sound is unmistakable. This will cause severe damage to the turbos seals and bearings, and is very bad for the turbo.

 

How blow off valves work is very simple. It’s essentially a plunger that has a spring over it. When your engine is under boost, there is a force from the boost going though the vacuum line, forcing down the plunger, and thus sealing the system. When you let off the gas, the throttle plate closes and the engine begins creating vacuum, and it is this force that pulls the plunger up and releases the air though an opening.

 

 

http://www.alltrac.net/images/bov/st205hksSSQBOV.jpg

[BaMBiNo]

u better check with raymond at toa payoh renault. he will help u. coz tt other time i wanted to fit one on my trafic but they say its running on high boost? not to sure.. check how much boost its running on thn see from there. i noe VW caddys can but they are petrol rite?