BOV as a boost limiter
09-22-2022, 05:24 AM
#41
Burning Brakes
Thread Starter
Exactly.
I am working out a 'Dial-A-Boost' for my new engine.
I am working out a 'Dial-A-Boost' for my new engine.
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C6_Prodigy (09-22-2022)
09-22-2022, 11:13 PM
#42
Drifting
is that a second bov with a very weak spring you are using? from the diagram, are you blowing off pressure to the fuel regulator as well?
Last edited by romandian; 09-24-2022 at 12:47 AM.
09-23-2022, 05:52 AM
#43
Burning Brakes
Thread Starter
One BoV, located after the CSC and before the intercooler. It has the lightest spring TurboSmart makes for that BoV.
Yes, there is a vacuum/pressure reference line running to the fuel pressure regulator. The static fuel pressure setting is 58 PSI. The fuel pressure rises with boost, i.e. at 6 PSI boost the fuel pressure is regulated at 64 PSI. At cruise the fuel pressure drops down to ~ 50 to 52 PSI.
The BoV is a TurboSmart RacePort with the Pink spring. TurboSmart rates the spring at 4 InHg which equates to 1.9 PSI. This seems to be enough to prevent flutter. It is loud though. You can really hear the blades of the impeller at low RPMs.
The boost limiter is a Hallman manual boost controller with the light spring and a ceramic ball. This gives you fine adjustment capability and no flutter that I can detect.
The fuel pressure regulator is a Fore F2i, part of a Fore Level 2 Triple Pump system
Yes, there is a vacuum/pressure reference line running to the fuel pressure regulator. The static fuel pressure setting is 58 PSI. The fuel pressure rises with boost, i.e. at 6 PSI boost the fuel pressure is regulated at 64 PSI. At cruise the fuel pressure drops down to ~ 50 to 52 PSI.
The BoV is a TurboSmart RacePort with the Pink spring. TurboSmart rates the spring at 4 InHg which equates to 1.9 PSI. This seems to be enough to prevent flutter. It is loud though. You can really hear the blades of the impeller at low RPMs.
The boost limiter is a Hallman manual boost controller with the light spring and a ceramic ball. This gives you fine adjustment capability and no flutter that I can detect.
The fuel pressure regulator is a Fore F2i, part of a Fore Level 2 Triple Pump system
Last edited by SteveJewels; 09-23-2022 at 05:59 AM.
09-23-2022, 02:41 PM
#44
Instructor
I was just looking at Blacksheepindustries out of Canada for my turbo build on another project, and their BOVs are listed as having a port on the bottom for use with centrifugal scs to work with boost controllers.
http://blacksheepindustries.ca/produ...40453727912136
http://blacksheepindustries.ca/produ...40453727912136
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romandian (09-24-2022)
09-24-2022, 12:52 AM
#45
Drifting
steve, how does the setup behave when driving? i have an adjustable bov and i once put it on the lightest setting and didnt like it. i was years ago and i cont remember what the issue was.
09-24-2022, 07:36 AM
#46
Burning Brakes
Thread Starter
@romandian It is great. The light spring and ceramic ball in the boost controller make the crack pressure very low and it doesn't flutter. The < 2 PSI spring makes the BoV very responsive and controllable.
@Evilbeard Looks like they are using a variable boost controller on the bottom port which is connected to an electronic ECM. It would be useful if you are running higher boost and want to have the ECM adjust boost 'on the fly' like for a drag strip application.
@Evilbeard Looks like they are using a variable boost controller on the bottom port which is connected to an electronic ECM. It would be useful if you are running higher boost and want to have the ECM adjust boost 'on the fly' like for a drag strip application.
Last edited by SteveJewels; 09-24-2022 at 07:44 AM.
02-02-2023, 12:45 AM
#47
How's the dial-a-boost coming?
Haven't forgotten about this thread. Been doing a lot of thinking. I don't want to use a restrictor based on what Josh @ A&A told me, so I'm leaning toward a 10% OD balancer with a 3.6 or 3.8" pulley on the Ti. This alone would be too much sauce for a stock LS3 with stock exhaust and no meth.
My thinking is by copying your setup with the Hallman controller, it should give me that low end power and control top end from being too much. Wondering if I'd also be able to dial it down to almost no boost for a track day (road course, not strip) to prevent as much heat soak since I won't need the power there.
Are you using the BOV that comes with the A&A kit or an aftermarket TurboSmart?
Haven't forgotten about this thread. Been doing a lot of thinking. I don't want to use a restrictor based on what Josh @ A&A told me, so I'm leaning toward a 10% OD balancer with a 3.6 or 3.8" pulley on the Ti. This alone would be too much sauce for a stock LS3 with stock exhaust and no meth.
My thinking is by copying your setup with the Hallman controller, it should give me that low end power and control top end from being too much. Wondering if I'd also be able to dial it down to almost no boost for a track day (road course, not strip) to prevent as much heat soak since I won't need the power there.
Are you using the BOV that comes with the A&A kit or an aftermarket TurboSmart?