1:50 the problem is when you close the throttle the waste gate cant flow enough air and pressure drops slowly so it still has pressure, it spikes when the 2 air fronts meet is forced back into the turbo, the turbo suddenly stops spinning in balance and binds the noise is the turbo fins slowing down and then speeding up as air is forced threw it, putting a lot of strain on the bearings, the blow off valve should open with the waste gate to control pressure then you don't need as big of a waste gate valve and will have much more control, a fast acting Eletronic BOV could maintain correct pressure in the intake in-between shifts to eliminate lag and turbo bearing stress, a boost bottle reservoir could also help but is complicated
What about surge at lower revs under throttle when the turbo is too big for the engine but you need that turbo in the top end? Can you use an electronic BOV controlled by the ECU to alleviate surge?
If I’m going from recirculating bpv to a turbosmart kompact dual port 50/50 vent/recir w blue spring on my kraftwerks supercharger setup, will it hinder performance? It’s for my 9th gen civic si, and im switching bc the provided bpv from kraftwerks is known to be not so reliable, thank you !
Installing a stiffer spring in your BOV will make it more difficult for the valve to open and release pressure. Using too stiff of a spring will induce compressor surge.
Soo..... what do these do in regards to the power or performance ? Do you lose power by releasing the air ? Do you gain any benefits apart from saving the turbo?
BOV's protect the turbocharger. Regardless of whether the pressure is being vented out of a BOV or back to the turbocharger allowing compressor surge, pressure will release from the charge pipes. Typically this air will only release when you get off throttle so, no you should not lose power since you are not giving a throttle input at that time. Aside from protecting the turbo a BOV does not provide much performance benefit.
Isn't a blow off valve doing the same job as my stock blow out valve? Have a 1.6 turbo diesel, first trubo engine and well, it literally broke the shaft between the two compressor wheels...
Great Video! Quality products!
Came here for the pffft pfftt noises, stayed for the genuinely useful tech info:)
Turbosmart takes pride of place in my engine bay
1:50 the problem is when you close the throttle the waste gate cant flow enough air and pressure drops slowly so it still has pressure, it spikes when the 2 air fronts meet is forced back into the turbo, the turbo suddenly stops spinning in balance and binds the noise is the turbo fins slowing down and then speeding up as air is forced threw it, putting a lot of strain on the bearings, the blow off valve should open with the waste gate to control pressure then you don't need as big of a waste gate valve and will have much more control, a fast acting Eletronic BOV could maintain correct pressure in the intake in-between shifts to eliminate lag and turbo bearing stress, a boost bottle reservoir could also help but is complicated
This is an awesome explanation, thanks legends!
Glad you liked it!
Very helpful Thanks Bro
What about surge at lower revs under throttle when the turbo is too big for the engine but you need that turbo in the top end? Can you use an electronic BOV controlled by the ECU to alleviate surge?
when did Matt join turbosmart from Haltech?
If I’m going from recirculating bpv to a turbosmart kompact dual port 50/50 vent/recir w blue spring on my kraftwerks supercharger setup, will it hinder performance? It’s for my 9th gen civic si, and im switching bc the provided bpv from kraftwerks is known to be not so reliable, thank you !
you the man !!!
What bov. Will work on the 24 canyon?
Hello.
What do you advise me to install on an 8.71 blower on a big block Chevy which surges a lot. I hate it and I would like it to stop.
Thanks.
If i make the spring tighter will that cause surge? Im the guy that makes noises at work @myself
Installing a stiffer spring in your BOV will make it more difficult for the valve to open and release pressure. Using too stiff of a spring will induce compressor surge.
Soo..... what do these do in regards to the power or performance ? Do you lose power by releasing the air ? Do you gain any benefits apart from saving the turbo?
BOV's protect the turbocharger. Regardless of whether the pressure is being vented out of a BOV or back to the turbocharger allowing compressor surge, pressure will release from the charge pipes. Typically this air will only release when you get off throttle so, no you should not lose power since you are not giving a throttle input at that time. Aside from protecting the turbo a BOV does not provide much performance benefit.
Matt you joined turbosmart
Isn't a blow off valve doing the same job as my stock blow out valve? Have a 1.6 turbo diesel, first trubo engine and well, it literally broke the shaft between the two compressor wheels...
Matt from Turbosmart now!!
6 years of stu stu stuuooo and no drama…