Turbocharger Without BOV?

[donCityZ]

Hello all.

Im getting a turbo car soon. I am pretty sure there is BOV inside.
But can I get rid of the BOV? I really hate the BOV sound.

I want a flutter sound instead - like this: YouTube- MR Turbo's flutter

Any turbo sifu have this setup on your car? do share.. thanks.

 

[DanzEterna]

get the internal BOV, like the one used in impreza WRX.
u no need to get turbo la. u get supercharger enough....
turbo must have BOV ma, the function is to release the excessive air produced by the turbine, without it, the air will tendang balik into the turbine, therfore will damage the fins.

 

[HKS-GT2835R]

the air will tendang balik into the turbine, therfore will damage the fins.

one thingy abt that point.

how come compressed air damage fin la? say if less than 2 bar of compressed air can damage turbo fins, then how does the throttle butterfly plate survives the compressed air la?

all my years of having damaged turbos, it's never did anything to the fin. i ran bov-disabled system fer few months, running 0.8~1.0 bar at some point (gotta blame the imitation BOV but that's another story.)..

heck, some turbo cars NEVER had BOV's as stock.

it's ALWAYS the oil seal in my case. ALWAYS..

 

[lan evo]

my car running without bov now,the flutter sounds quite annoying after sometimessounds like theres so many bird inside the engine bay chiu chiu chiu chiu... lol

going to install a bov soon,turbosurging part throttle now

 

[renxun]

unless you are running auto on drag races then its differant story of not having a blow valve.

how would it damage the fin? it will break your turbine shaft. wid such a heavy thrust producing boost and suddenly kena backed off the load is significantly high.... try move forward on 1st gear and then press clutch and engage your reverse

 

[HKS-GT2835R]

wid such a heavy thrust producing boost and suddenly kena backed off the load is significantly high.... try move forward on 1st gear and then press clutch and engage your reverse

IMO you're comparing 2 different things altogether. turbined dun spool backwards upon chirps, the momentum it spun is way too fast.

say a turbine spins fer 100,000rpm, and then suddenly the air can go nowhere, so it being pushed out through the fan. that last part there creates the chirping sound.

has someone actually broke the shaft because of that?
share own experience only please.

 

[xtremeleo]

its always better tot have one, just tighten it ler, senang beb

 

[papagoines]

Taken from wikipedia

Blowoff valves are used to prevent compressor surge, a phenomenon that readily occurs when lifting off the throttle of an unvented, turbocharged engine. When the throttle plate on a turbocharged engine closes, the high pressure air in the intake system is trapped by the throttle and a pressure wave is forced back into the compressor. The compressor wheel slows rapidly and may even stall, and the driver will notice a fluttering air sound. The rapid slowing or stalling stresses the turbo and imparts severe turbo lag if the driver accelerates immediately after the surge event.

get a recirculated BOV and maintains stock airbox (maybe just use aftermarket drop-in filter instead)... and you have a stealth turbo car....

 

[SYeNi69]

IMO you're comparing 2 different things altogether. turbined dun spool backwards upon chirps, the momentum it spun is way too fast.

say a turbine spins fer 100,000rpm, and then suddenly the air can go nowhere, so it being pushed out through the fan. that last part there creates the chirping sound.

has someone actually broke the shaft because of that?
share own experience only please.

Bro i have broken the shaft :wavey: ... I once bought a Turbo that was choosen by Tong after i explained my engine specs to him ... I said that i was gonna boost a minimum of 2.5 ... I ended up boosting 2.7 daily driven ... He might have tought i was lying so he sold me this turbo and under estimated me ... i returned the turbo back in 1 month with shaft patah and fin gone ... because it spool backwards upon chirps ... :proud:

On daily drives i would use my SARD racing BOV (UFO type) ... for drags i would just replace the bov with a rubber stopper or battery so that i dont get any boost leak ... According to Tong ... that was the reason the shaft broke ... basically he thought i was BShitting all the way and never thought i was gonna boost that high ...

Just sharing my past experience ... Happy Boosting ... To every one ... if u change ur BOV and the sound is Turrr turrr ... better change to a different one ... its gonna spoil ur Turbo ...Hell its not even ur BOV sound ... its the sound of the turbo surge ... its good in a way there's no boost leak .. but it will slowly reduce the lifetime of ur turbo ... if boost below 0.5bar they maybe ok kut ...

Cheers

 

[HKS-GT2835R]

Bro i have broken the shaft :wavey: ... I once bought a Turbo that was choosen by Tong after i explained my engine specs to him ... I said that i was gonna boost a minimum of 2.5 ... I ended up boosting 2.7 daily driven ... He might have tought i was lying so he sold me this turbo and under estimated me ... i returned the turbo back in 1 month with shaft patah and fin gone ... because it spool backwards upon chirps ... :proud:

On daily drives i would use my SARD racing BOV (UFO type) ... for drags i would just replace the bov with a rubber stopper or battery so that i dont get any boost leak ... According to Tong ... that was the reason the shaft broke ... basically he thought i was BShitting all the way and never thought i was gonna boost that high ...

Just sharing my past experience ... Happy Boosting ... To every one ... if u change ur BOV and the sound is Turrr turrr ... better change to a different one ... its gonna spoil ur Turbo ...Hell its not even ur BOV sound ... its the sound of the turbo surge ... its good in a way there's no boost leak .. but it will slowly reduce the lifetime of ur turbo ... if boost below 0.5bar they maybe ok kut ...

Cheers

2.7 bar http://www.addemoticons.com/emoticon/crazy/AddEmoticons0056.gif

 

[nan83]

huyoo... 2.7bar .... race fuel?? @ what static compress ratio?? erkk... daily drive with race fuel??

 

[SYeNi69]

huyoo... 2.7bar .... race fuel?? @ what static compress ratio?? erkk... daily drive with race fuel??

1000cc block ... 2E turbo pistons (damn low comp) ... 3mm below top dead center ... L2 head ... 2 bosch fuel pump ... Sard double diapharm fuel reg. ... Good ol SAFC II ... and blablabla ... normal fuel ...

I wish to go higher but not recommended by my pomen ... its a Kancil btw ... zaman2 muda ... NS Garage is boosting at 3bar and many more ... how much u think thoose drag kancil boosting ??

How do u think we can achive 200hp ++ ... Prodrag kancil 290hp ++ ... obviously theres no way from a 1.0cc block right ... so thats where the boost come in ...

---------- Post added at 08:21 AM ---------- Previous post was at 08:20 AM ----------

Nan ... Ala ur brother flamefox should know this .. and also me

 

[nan83]

hehehe

 

[donCityZ]

get the internal BOV, like the one used in impreza WRX.
u no need to get turbo la. u get supercharger enough....
turbo must have BOV ma, the function is to release the excessive air produced by the turbine, without it, the air will tendang balik into the turbine, therfore will damage the fins.

Fins so easily damage by AIR? Actually this is what the BOV supplier tell u to get u buy their BOV. Actually BOV is used to make it easier to TUNE your car only.

---------- Post added at 09:11 AM ---------- Previous post was at 09:07 AM ----------

my car running without bov now,the flutter sounds quite annoying after sometimessounds like theres so many bird inside the engine bay chiu chiu chiu chiu... lol

going to install a bov soon,turbosurging part throttle now

THANKS FOR THIS INFO. What car is yours? Looks like a Silvia?
LOL! so u dont like the flutter hor? Kekeke... for me is reverse, i love the flutter.

---------- Post added at 09:13 AM ---------- Previous post was at 09:11 AM ----------

Bro i have broken the shaft :wavey: ... I once bought a Turbo that was choosen by Tong after i explained my engine specs to him ... I said that i was gonna boost a minimum of 2.5 ... I ended up boosting 2.7 daily driven ... He might have tought i was lying so he sold me this turbo and under estimated me ... i returned the turbo back in 1 month with shaft patah and fin gone ... because it spool backwards upon chirps ... :proud:

On daily drives i would use my SARD racing BOV (UFO type) ... for drags i would just replace the bov with a rubber stopper or battery so that i dont get any boost leak ... According to Tong ... that was the reason the shaft broke ... basically he thought i was BShitting all the way and never thought i was gonna boost that high ...

Just sharing my past experience ... Happy Boosting ... To every one ... if u change ur BOV and the sound is Turrr turrr ... better change to a different one ... its gonna spoil ur Turbo ...Hell its not even ur BOV sound ... its the sound of the turbo surge ... its good in a way there's no boost leak .. but it will slowly reduce the lifetime of ur turbo ... if boost below 0.5bar they maybe ok kut ...

Cheers

Lets not get into BOT. Actually if spoil turbo, means only 1 thing: tuner dont know how to tune.

If you see WRC rally, most of the cars there also have turbo flutters, they dont have a BOV. BOV is made to make it easy to tune turbo cars. WRC cars cannot afford to have unnecessary parts. but, are you saying those WRC cars going to damage their turbine fiin/shaft? No. bcos their tuner is a good tuner.

 

[jinkl]

if u r on a antilag fitted or tuned car
then u may throw away ur bov
because u may never hit vacuum

example : rally cars :D

bt do remember, rally cars service or change new turbo every race

 

[donCityZ]

1000cc block ... 2E turbo pistons (damn low comp) ... 3mm below top dead center ... L2 head ... 2 bosch fuel pump ... Sard double diapharm fuel reg. ... Good ol SAFC II ... and blablabla ... normal fuel ...

I wish to go higher but not recommended by my pomen ... its a Kancil btw ... zaman2 muda ... NS Garage is boosting at 3bar and many more ... how much u think thoose drag kancil boosting ??

How do u think we can achive 200hp ++ ... Prodrag kancil 290hp ++ ... obviously theres no way from a 1.0cc block right ... so thats where the boost come in ...

---------- Post added at 08:21 AM ---------- Previous post was at 08:20 AM ----------

Nan ... Ala ur brother flamefox should know this .. and also me

*SIGH* it is so obvious our local tuners need to learn more about increasing horses. There are 2 ways to increase horses for turbo/super chargers. 1. make engine more efficient. 2. increase boost.

the most effective and safe is method 1. not just continue with method 2 till kingdom come.

if u have a stock car boosted with BOT, the first thing to do is to increase its "NA" power. In the US, I have seen a civic non vtec 1.6 boosted at 1-1.5bar but with a whopping 350bhp++.. how? camshaft, intakes, headers, pnp, better ignition, stronger valve spring. This is the safe way to go.

for every "NA" power you increase, the total power will be a lot more when boosted, compare to just increase boost alone.

---------- Post added at 09:29 AM ---------- Previous post was at 09:22 AM ----------

if u r on a antilag fitted or tuned car
then u may throw away ur bov
because u may never hit vacuum

example : rally cars :D

bt do remember, rally cars service or change new turbo every race

NO, unless the rally car accident. they normally just change oil and tune back only
btw races. most parts they change is the tyres/suspension/gearbox bcos that got used a lot.

but u are right in saying that can throw bov if tuned car.

 

[HKS-GT2835R]

if u r on a antilag fitted or tuned car
then u may throw away ur bov
because u may never hit vacuum

example : rally cars :D

bt do remember, rally cars service or change new turbo every race

they have less than 1 hr fer every checkpoint meh?
i nvr seen them change turbo, but often gearbox, shafts, oilcooler, misc other?

 

[SYeNi69]

I beg to differ ...

doncityz - i wasnt aiming for hp ... if i was i would have probably fitted an AR70/TD06 turbo and free boost at 8500rpm i might make it till 1.5bar ... still my hp would be higher ... but then my car lag like hell la ...

i was aiming for torque ... i got 273.2whp to be exact ... when all my internals were done ... and not much more to do besides a custom gearbox ... to quench out as many torque as we can ... we raised the boost bit by bit ... although knowing my engine at the time could take 3.0bar ... why risk it ... so i stayed with 2.7bar ... the main problem at that time was not the engine part but the turbo itself ... tends to kong 24/7 ... thats why at last i went to tong to discuss this ...

HKS - The turbo rally car using might not be the same as those in production line ... i think theirs is better and more durable ... i think la ...

 

[jinkl]

really depends on the anti lag system and how agresive it is

is it the anti lag system where by it sprays fuel into the exhaust manifold
or is it just the standalone or electronic doing a timing retard n etc

my point is that, the anti lag fitted rally cars do not enter the vacuum phase and they dont need the bovs. even drag cars , some of them dont have bovs , as they let go their throthle, anti lag comes in to keep the car in boost thus no air needs to be vented out

 

[DanzEterna]

don city,
read quote by papagoines.