3S-GTE USDM Turbo Engine Which BOV? - Page 9

djpkins · 05-30-2009, 04:13 AM

I like the turbosmart one...my friend jonny testpilot has one fitted to his rev 3....it's like a behemoth of power going off under the lid...guaranteed to scare kids and old people...I have actually heard some one say "oh my god" as it dumped it's load on them...lol...also loving the low revs....PFahfahfaffafa...

iceman · 07-29-2009, 12:27 AM

For those who like blow off valves I just bought the turboxs hybrid one. It vents to air and intake. I have had no sputters or anything like when you leave the stock one open or replace it.

mr2_mk1.5 · 09-14-2009, 03:35 PM

I have learnt from personal experience to beware what type of blow off is used. I personally like a recirculating blow off valve but have discovered some are better then others. If you're running high boost definetly get a piston style instead of a diaphram style. I was running the stock toyota bypass valve at 25psi boost and at 7500RPM in third my diaphram ruptured and the pintle and spring got free and took a trip through my T3/T4 compressor wheel destroying it in mere seconds without so much as a sound and pumped enough oil into the engine to create the kind of pressure needed to lift my head and destroy every bearing in the engine

. I have switched to a GT3082R with a 38mm sleeper series turbosmart bypass valve as well as forged engine internals and a custom intake manifold. I have no complaints about the bypass valve and is extremly easy to adjust since you don't have to take it apart to shim it just simply turn the dial.

weapon5 · 10-09-2009, 11:52 AM

You want a good bov that won't leak psi under pressure also bov sound sweet and it help the turbo from compression surge, if you don't have a bov and run your turbo too much the compression wheel will break off the shaft I know cause it happen to me

so who ever hate on a bov and they are running turbo then they should sell it and get a NA

weapon5 · 10-09-2009, 11:52 AM

btw research the bov before getting on I know the first gen hks have problems.

MANDALAY · 10-10-2009, 06:49 AM

OEM and always OEM

MR2BOY23 · 10-11-2009, 03:30 PM

Haven't read through the whole thread yet, might have been mentioned before.

But is it true that the stock bpv sucks in air at certain loads ? To bypass the turbo and make the car a little more responsive?

Motocompo · 10-25-2009, 03:28 AM

Quote:

Originally Posted by MANDALAY

OEM and always OEM

Yeah (Recirculation valves in general), I would agree unless your runing a MAP sensor with aftermarket ecu.

MANDALAY · 10-25-2009, 10:36 AM

Im going to run MAP with a MoTec and ill still run the oem bov. Reason is TOYOTA got it right

mr2_mk1.5 · 10-31-2009, 08:30 PM

I agree full heartedly with mandalay to a point, there are better valves then stock but recirc all the way, I'm one of those guys that like building a sleeper and nothing says otherwise more then a whistling or farting sound coming from the back of my car when I shift, the problem with the OEM valve is its a diaphram style which isn't good for high boost, I have a junked T3/T4 with 1000km on it to atest that, check out turbosmart they are a reputible brand, easy to adjust and come in all sizes right up to 38mm and they look great and to top it off its piston and spring

RC MR2 · 11-19-2009, 11:12 AM

greddy or hkss

karl · 11-22-2009, 10:32 PM

Quote:

Originally Posted by MR2BOY23

But is it true that the stock bpv sucks in air at certain loads ? To bypass the turbo and make the car a little more responsive?

nope. it's total BS. air only ever comes OUT of the valve. a spinning turbo will always push air, and the turbo is spinning whenever the engine is running. that + closed throttle plate = air comes OUT whatever hole happens to open up.

MDoe8 · 11-25-2009, 02:34 AM

I've recently purchased a synapse synchronic and couldn't be happier with it! the response is unbelievable, no other word for it. Lightyears better than the hks ssqv i just removed. i highly recommend this piece to everyone!

Bak@EMSPowered · 11-25-2009, 11:01 AM

Quote:

Originally Posted by MDoe8

I've recently purchased a synapse synchronic and couldn't be happier with it! the response is unbelievable, no other word for it. Lightyears better than the hks ssqv i just removed. i highly recommend this piece to everyone!

It's a great BOV. Make sure to put a filter on it, it stays open at vacuum and may suck in dirt.

MDoe8 · 11-25-2009, 12:18 PM

It is open at vacuum but won't suck anything in, it's "blowing off" at idle. I am still going to filter it though as stuff can fall in for sure.

Bak@EMSPowered · 11-25-2009, 12:59 PM

During idle you have no boost, you have vacuum. Any open ports suck air in under vacuum.

MDoe8 · 11-25-2009, 02:33 PM

The turbo is still spinning though and the bov is constantly pushing air out. Althogh not a lot, and I should definitely still get a filter, it is pushing air out...not sucking it in.

Sang · 11-25-2009, 03:35 PM

Quote:

Originally Posted by baktasht

During idle you have no boost, you have vacuum. Any open ports suck air in under vacuum.

At idle, the throttle plate is closed and you have vacuum in the manifold behind the throttle plate, not in front of the throttle plate in the charge pipes. In the charge pipes you don't have vacuum.

This is also one of the reasons why Tial strongly recommends that if you run their wastegates at spring pressure by using a direct line from boost source to side port, that you use a reference line somewhere in front of the TB because the wastegate was NOT designed to see any vacuum.

Bak@EMSPowered · 11-25-2009, 03:47 PM

Interesting. I stand corrected.

MDoe8 · 11-25-2009, 04:06 PM

you were still 100% correct on needing a filter though. It's definitely not enough air being pushed to stop anything from getting in the pipes.

07-29-2009, 12:27 AM	#162 (permalink)
iceman Cage Fighter Join Date: May 2007 Posts: 235 Thanks: 3 Thanked 0 Times in 0 Posts iTrader Rating: (4/100% )	For those who like blow off valves I just bought the turboxs hybrid one. It vents to air and intake. I have had no sputters or anything like when you leave the stock one open or replace it. Last edited by iceman; 07-31-2009 at 11:20 PM..

09-14-2009, 03:35 PM	#163 (permalink)
mr2_mk1.5 Cage Fighter Join Date: May 2009 Location: Regina, Saskatchewan Canada Posts: 165 Thanks: 0 Thanked 10 Times in 9 Posts iTrader Rating: (1/100% )	I have learnt from personal experience to beware what type of blow off is used. I personally like a recirculating blow off valve but have discovered some are better then others. If you're running high boost definetly get a piston style instead of a diaphram style. I was running the stock toyota bypass valve at 25psi boost and at 7500RPM in third my diaphram ruptured and the pintle and spring got free and took a trip through my T3/T4 compressor wheel destroying it in mere seconds without so much as a sound and pumped enough oil into the engine to create the kind of pressure needed to lift my head and destroy every bearing in the engine. I have switched to a GT3082R with a 38mm sleeper series turbosmart bypass valve as well as forged engine internals and a custom intake manifold. I have no complaints about the bypass valve and is extremly easy to adjust since you don't have to take it apart to shim it just simply turn the dial.

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Posted By	For	Type	Date
Toyota MR2 Message Board	This thread	Refback	08-21-2007 12:37 AM

05-30-2009, 04:13 AM	#161 (permalink)
djpkins zero talent Join Date: May 2009 Location: united kingdom Posts: 8 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	I like the turbosmart one...my friend jonny testpilot has one fitted to his rev 3....it's like a behemoth of power going off under the lid...guaranteed to scare kids and old people...I have actually heard some one say "oh my god" as it dumped it's load on them...lol...also loving the low revs....PFahfahfaffafa...

10-09-2009, 11:52 AM	#164 (permalink)
weapon5 Some Skills Join Date: Sep 2009 Location: MN Posts: 95 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	You want a good bov that won't leak psi under pressure also bov sound sweet and it help the turbo from compression surge, if you don't have a bov and run your turbo too much the compression wheel will break off the shaft I know cause it happen to me so who ever hate on a bov and they are running turbo then they should sell it and get a NA

10-09-2009, 11:52 AM	#165 (permalink)
weapon5 Some Skills Join Date: Sep 2009 Location: MN Posts: 95 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	btw research the bov before getting on I know the first gen hks have problems.

10-10-2009, 06:49 AM	#166 (permalink)
MANDALAY Beams Owners Group Join Date: Feb 2007 Location: victoria AUSTRALIA Posts: 4,209 Thanks: 136 Thanked 112 Times in 107 Posts My Google Map iTrader Rating: (6/100% )	OEM and always OEM

10-11-2009, 03:30 PM	#167 (permalink)
MR2BOY23 Some Skills Join Date: Aug 2009 Location: Auckland, New Zealand Posts: 64 Thanks: 0 Thanked 1 Time in 1 Post iTrader Rating: (0/0% )	Haven't read through the whole thread yet, might have been mentioned before. But is it true that the stock bpv sucks in air at certain loads ? To bypass the turbo and make the car a little more responsive?

10-25-2009, 10:36 AM	#169 (permalink)
MANDALAY Beams Owners Group Join Date: Feb 2007 Location: victoria AUSTRALIA Posts: 4,209 Thanks: 136 Thanked 112 Times in 107 Posts My Google Map iTrader Rating: (6/100% )	Im going to run MAP with a MoTec and ill still run the oem bov. Reason is TOYOTA got it right

10-31-2009, 08:30 PM	#170 (permalink)
mr2_mk1.5 Cage Fighter Join Date: May 2009 Location: Regina, Saskatchewan Canada Posts: 165 Thanks: 0 Thanked 10 Times in 9 Posts iTrader Rating: (1/100% )	I agree full heartedly with mandalay to a point, there are better valves then stock but recirc all the way, I'm one of those guys that like building a sleeper and nothing says otherwise more then a whistling or farting sound coming from the back of my car when I shift, the problem with the OEM valve is its a diaphram style which isn't good for high boost, I have a junked T3/T4 with 1000km on it to atest that, check out turbosmart they are a reputible brand, easy to adjust and come in all sizes right up to 38mm and they look great and to top it off its piston and spring

11-19-2009, 11:12 AM	#171 (permalink)
RC MR2 FREZH Join Date: May 2009 Location: Richmond,VA Posts: 222 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	greddy or hkss

11-25-2009, 02:34 AM	#173 (permalink)
MDoe8 Boost = Funner Join Date: Sep 2009 Location: Northern Colorado Posts: 261 Thanks: 4 Thanked 2 Times in 2 Posts iTrader Rating: (1/100% )	I've recently purchased a synapse synchronic and couldn't be happier with it! the response is unbelievable, no other word for it. Lightyears better than the hks ssqv i just removed. i highly recommend this piece to everyone!

11-25-2009, 12:18 PM	#175 (permalink)
MDoe8 Boost = Funner Join Date: Sep 2009 Location: Northern Colorado Posts: 261 Thanks: 4 Thanked 2 Times in 2 Posts iTrader Rating: (1/100% )	It is open at vacuum but won't suck anything in, it's "blowing off" at idle. I am still going to filter it though as stuff can fall in for sure.

11-25-2009, 12:59 PM	#176 (permalink)
Bak@EMSPowered Banned Seller Join Date: Oct 2005 Location: Austin, TX Posts: 5,925 Thanks: 30 Thanked 193 Times in 165 Posts My Google Map iTrader Rating: (49/93% )	During idle you have no boost, you have vacuum. Any open ports suck air in under vacuum.

11-25-2009, 02:33 PM	#177 (permalink)
MDoe8 Boost = Funner Join Date: Sep 2009 Location: Northern Colorado Posts: 261 Thanks: 4 Thanked 2 Times in 2 Posts iTrader Rating: (1/100% )	The turbo is still spinning though and the bov is constantly pushing air out. Althogh not a lot, and I should definitely still get a filter, it is pushing air out...not sucking it in.

11-25-2009, 03:47 PM	#179 (permalink)
Bak@EMSPowered Banned Seller Join Date: Oct 2005 Location: Austin, TX Posts: 5,925 Thanks: 30 Thanked 193 Times in 165 Posts My Google Map iTrader Rating: (49/93% )	Interesting. I stand corrected.

11-25-2009, 04:06 PM	#180 (permalink)
MDoe8 Boost = Funner Join Date: Sep 2009 Location: Northern Colorado Posts: 261 Thanks: 4 Thanked 2 Times in 2 Posts iTrader Rating: (1/100% )	you were still 100% correct on needing a filter though. It's definitely not enough air being pushed to stop anything from getting in the pipes.