Mbc?
Nov 19, 2016 | 04:13 PM
#1
Mbc?
I installed a grimmspeed manual boost controller today. Not sure I like it. I first installed it according to precision instructions.
B. Manual Boost Controller Method “bleeder valve” Install boost signal hose from the turbocharger compressor cover hose barb, to the bottom of a plastic Tee. Install one hose from one port of the Tee, to the bottom banjo barb port of the wastegate can. Install a second hose from the other side of the Tee, into the inlet of your manual boost controller. (Refer to your manual controllers instructions to determine which port is inlet port.) Install another hose from the outlet port of the manual boost controller, to the top banjo barb port of the wastegate. Secure all hose connections with zip ties or hose clamps. Make sure to route all hoses away from high heat sources. With the manual boost controller closed, so that no boost signal pressure passes through it, the wastegates spring rate should control boost levels. Opening the manual boost controller applies pressure to the top of the wastegate, delaying the valve from opening, effectively raising your boost levels. Once you have achieved your desired boost level, no further adjustment of the manual boost controller is necessary.
This did not work for me with controller at zero the truck had no boost control it jumped to 12 psi quick. Hopefully did not damage anything. So I did it by grimm's directions. Connect compressor line to controller inlet and bottom port of wastegate to outlet. This works somewhat. I want to be at 7psi for now but it always seems to creep up to 8. Is this typical of MBC? Also why are precisions directions different? Why did it not work for me?
B. Manual Boost Controller Method “bleeder valve” Install boost signal hose from the turbocharger compressor cover hose barb, to the bottom of a plastic Tee. Install one hose from one port of the Tee, to the bottom banjo barb port of the wastegate can. Install a second hose from the other side of the Tee, into the inlet of your manual boost controller. (Refer to your manual controllers instructions to determine which port is inlet port.) Install another hose from the outlet port of the manual boost controller, to the top banjo barb port of the wastegate. Secure all hose connections with zip ties or hose clamps. Make sure to route all hoses away from high heat sources. With the manual boost controller closed, so that no boost signal pressure passes through it, the wastegates spring rate should control boost levels. Opening the manual boost controller applies pressure to the top of the wastegate, delaying the valve from opening, effectively raising your boost levels. Once you have achieved your desired boost level, no further adjustment of the manual boost controller is necessary.
This did not work for me with controller at zero the truck had no boost control it jumped to 12 psi quick. Hopefully did not damage anything. So I did it by grimm's directions. Connect compressor line to controller inlet and bottom port of wastegate to outlet. This works somewhat. I want to be at 7psi for now but it always seems to creep up to 8. Is this typical of MBC? Also why are precisions directions different? Why did it not work for me?
Nov 19, 2016 | 06:03 PM
#2
Venting boost away from the bottom while top port is vented will raise boost setting towards true spring psi.
applying boost to top and bottom ports at the same level does the same thing.
Applying boost to top port while bottom port is vented will allow boost to go past true spring psi.
Boost psi setting you read on precision instructions.
It's also not an absolute.
The setting point you read can vary greatly from one build to the next.
applying boost to top and bottom ports at the same level does the same thing.
Applying boost to top port while bottom port is vented will allow boost to go past true spring psi.
Boost psi setting you read on precision instructions.
It's also not an absolute.
The setting point you read can vary greatly from one build to the next.
Nov 19, 2016 | 08:35 PM
#3
So if you connect the MBC like precision has it the MBC is reversed. Closed would allow the spring to control boost and opening the MBC would increase boost. With the MBC in between the pressure source and wastegate (top open to atmosphere) the MBC fully open will allow for spring to control boost and closing the MBC will increase boost. That sound right? Going to try it tomorrow.
Nov 19, 2016 | 08:43 PM
#4
Not sure I don't know those instruction.
I would connected the way the boost controller company says.
Not the way the turbo company says. Unless it's that turbo companies valve.
I would connected the way the boost controller company says.
Not the way the turbo company says. Unless it's that turbo companies valve.