Recomended MBC for Volvo 850 Turbo

Manual Boost Controllers (MBCs) are the cheapest way to get more power out of your turbo. Please do a Stage 0 first! This link has a good 'how to' on boost controllers for Volvo turbos. NOTE: with the ECU controlling the boost you may not get what you want with a MBC.

Manual Boost Controllers (MBCs) are the cheapest way to get more power out of your turbo. Please do a Stage 0 first!

clawless »

This link has a good ‘how to’ on boost controllers for Volvo turbos. With the ECU controlling the boost you may not get what you want with a MBC.

I plan on running his setup with Voodoo IV controllers once I get my other issues resolved, exhaust installed and upgrade the ECM.

Manual Boost Controller

matthew1 » 

I’ve had a $80 Hallman ES MBC in my 850 T5 for months and it’s great. Yes, you can make one for $20. If I could do it over, I’d go that route. It’s just a dead-simple mechanical device that either works or doesn’t. You’ll know the second you accelerate from your driveway if you’ve gotten it terribly wrong. IF you have a boost gauge.

Installing a manual boost controller - diagram of hoses and routing
Installing a manual boost controller – diagram of hoses and routing

It boosts to 15psi in 2nd, 3rd, 4th gears, and up to 10psi in 1st. Stock T5 behavior is 10psi in any gear. I do not have an ECU remap/chip/tune. I do have an R ECU. I do not get fuel cutoff until ~90mph / full throttle.

I do have a boost gauge. I would feel very uneasy using an MBC without one.

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Recomended MBC for Volvo 850 Turbo

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