To BOV or not to BOV, that is partially the question.
#1
To BOV or not to BOV, that is partially the question.
So this is the miata:
http://www.cardomain.com/ride/2088066/
I've had it for 7 years now, and it's time to boost it. Currently running 119.6HP at the wheels, and a factory new motor with 30,000 miles on it. I work at a performance shop and will be custom fabbing basically everything. I've amassed most of the pieces, but just looking for a bit of feedback on the setup:
Turbo: Rebuilt T28 from a SR20DET, internal wastegate
Manifold & Downpipe custom
Lindsay Racing 6" Thermal Hard Pipe Air / Water intercooler
Custom coolant reservoir
Oil / Coolant cooler for coolant
AEM F/IC
Now I'm sort of stuck on the question of a BOV. If I go for one, I will go recirc, but I'm also planning on running only about 8 psi on this setup. I've read a fair amount on the internets about not needing a BOV, and many proponents of this stance point out to factory cars that are running higher levels of boost without BOV's. Another common example are Subaru owners, who are running aftermarket turbo's at over 20PSI without a bov. SO, I'm looking for peoples opinions on this matter. I'd rather not have a BOV simply to save a bit of money, and I don't think they look terribly good (yah i know, shut up ).
Thanks folks.
http://www.cardomain.com/ride/2088066/
I've had it for 7 years now, and it's time to boost it. Currently running 119.6HP at the wheels, and a factory new motor with 30,000 miles on it. I work at a performance shop and will be custom fabbing basically everything. I've amassed most of the pieces, but just looking for a bit of feedback on the setup:
Turbo: Rebuilt T28 from a SR20DET, internal wastegate
Manifold & Downpipe custom
Lindsay Racing 6" Thermal Hard Pipe Air / Water intercooler
Custom coolant reservoir
Oil / Coolant cooler for coolant
AEM F/IC
Now I'm sort of stuck on the question of a BOV. If I go for one, I will go recirc, but I'm also planning on running only about 8 psi on this setup. I've read a fair amount on the internets about not needing a BOV, and many proponents of this stance point out to factory cars that are running higher levels of boost without BOV's. Another common example are Subaru owners, who are running aftermarket turbo's at over 20PSI without a bov. SO, I'm looking for peoples opinions on this matter. I'd rather not have a BOV simply to save a bit of money, and I don't think they look terribly good (yah i know, shut up ).
Thanks folks.
#2
So this is the miata:
http://www.cardomain.com/ride/2088066/
I've had it for 7 years now, and it's time to boost it. Currently running 119.6HP at the wheels, and a factory new motor with 30,000 miles on it. I work at a performance shop and will be custom fabbing basically everything. I've amassed most of the pieces, but just looking for a bit of feedback on the setup:
Turbo: Rebuilt T28 from a SR20DET, internal wastegate
Manifold & Downpipe custom
Lindsay Racing 6" Thermal Hard Pipe Air / Water intercooler
Custom coolant reservoir
Oil / Coolant cooler for coolant
AEM F/IC
Now I'm sort of stuck on the question of a BOV. If I go for one, I will go recirc, but I'm also planning on running only about 8 psi on this setup. I've read a fair amount on the internets about not needing a BOV, and many proponents of this stance point out to factory cars that are running higher levels of boost without BOV's. Another common example are Subaru owners, who are running aftermarket turbo's at over 20PSI without a bov. SO, I'm looking for peoples opinions on this matter. I'd rather not have a BOV simply to save a bit of money, and I don't think they look terribly good (yah i know, shut up ).
Thanks folks.
http://www.cardomain.com/ride/2088066/
I've had it for 7 years now, and it's time to boost it. Currently running 119.6HP at the wheels, and a factory new motor with 30,000 miles on it. I work at a performance shop and will be custom fabbing basically everything. I've amassed most of the pieces, but just looking for a bit of feedback on the setup:
Turbo: Rebuilt T28 from a SR20DET, internal wastegate
Manifold & Downpipe custom
Lindsay Racing 6" Thermal Hard Pipe Air / Water intercooler
Custom coolant reservoir
Oil / Coolant cooler for coolant
AEM F/IC
Now I'm sort of stuck on the question of a BOV. If I go for one, I will go recirc, but I'm also planning on running only about 8 psi on this setup. I've read a fair amount on the internets about not needing a BOV, and many proponents of this stance point out to factory cars that are running higher levels of boost without BOV's. Another common example are Subaru owners, who are running aftermarket turbo's at over 20PSI without a bov. SO, I'm looking for peoples opinions on this matter. I'd rather not have a BOV simply to save a bit of money, and I don't think they look terribly good (yah i know, shut up ).
Thanks folks.
Compressor surge isn't good, I'm personally pro BOV. If I could not use one I would... but its there for a practical reason.
#9
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I originally installed my system with no BOV since I was only running 7 psi. But, I really grew to hate the compressor surge noise and decided to put a BOV in anyway even though I did not 'need' it. Much, much better. I would do it again in a minute.
IMO calling the surge sound a turkey gobble is being generous. It sounds more like a low frequency fart to me and sounds like crap to me, literally. See the BOV link in my sig for more info.
IMO calling the surge sound a turkey gobble is being generous. It sounds more like a low frequency fart to me and sounds like crap to me, literally. See the BOV link in my sig for more info.
#13
Do any of you have idle issues using a VTA BOV?
I'm really just asking about the BOV because quite a large following of our customers are suddenly anti BOV. One of them is a guy building up a 91 skyline RB26. He's going single turbo GT4088R turbo, Full Race manifold, Haltech standalone. He was originally going to have a BOV, but has now decided to screw the BOV and run without it. His cohert in this processes is building a 7M-GTE up with a big turbo and has also decided to screw the BOV. The BOV definitely makes sense to me.
I'm really just asking about the BOV because quite a large following of our customers are suddenly anti BOV. One of them is a guy building up a 91 skyline RB26. He's going single turbo GT4088R turbo, Full Race manifold, Haltech standalone. He was originally going to have a BOV, but has now decided to screw the BOV and run without it. His cohert in this processes is building a 7M-GTE up with a big turbo and has also decided to screw the BOV. The BOV definitely makes sense to me.
#16
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Join Date: Jun 2007
Location: Overland Park, Kansas
Posts: 5,360
Total Cats: 43
Do any of you have idle issues using a VTA BOV?
I'm really just asking about the BOV because quite a large following of our customers are suddenly anti BOV. One of them is a guy building up a 91 skyline RB26. He's going single turbo GT4088R turbo, Full Race manifold, Haltech standalone. He was originally going to have a BOV, but has now decided to screw the BOV and run without it. His cohert in this processes is building a 7M-GTE up with a big turbo and has also decided to screw the BOV. The BOV definitely makes sense to me.
I'm really just asking about the BOV because quite a large following of our customers are suddenly anti BOV. One of them is a guy building up a 91 skyline RB26. He's going single turbo GT4088R turbo, Full Race manifold, Haltech standalone. He was originally going to have a BOV, but has now decided to screw the BOV and run without it. His cohert in this processes is building a 7M-GTE up with a big turbo and has also decided to screw the BOV. The BOV definitely makes sense to me.
I have a factory turbocharged mass air car which had installed a cheap plastic compressor bypass valve.. Never would boost a steady 16psi like it was supposed to, until I swapped out the BOV for a cheap ebay SSQV running VTA. After that swap, the car boosts full solid 16psi w/out leaking but of course since its setup for VTA the car runs odd. Since I've swapped that knockoff out for a Greddy Type-S knockoff running recirc.
Using a VTA BOV on a mass air car has no advantage at all unless you want to hear the valve.. What you're doing is releasing to the atmosphere metered air, which will cause the car to run rich after the air is released. Spoolup between shifts is significantly slower, the back bumper gets black faster, and the car will backfire between shifts often. Eventually the computer will likely trigger the check engine light for abnormal mixture conditions.
FWIW my Mazdaspeed miata with a VTA BOV would die at idle often.
If you want simple, BOV. If you want proper, BPV. Thats just my opinion.
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