Ford Cortina - In Rust We Trust

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October 17, 2026, 06:25:43 AM

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Author Topic: No wastegate  (Read 6429 times)

XMAN

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No wastegate
« on: August 12, 2008, 08:20:39 PM »
Im thinking of what would happen to a turbo system with no wastegate , only relying on a bov to stop overboosting , what would be the effect under full throttle and part throttle gear changing applications? any thoughts cheers.
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BigNorm

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No wastegate
« Reply #1 on: August 12, 2008, 08:45:20 PM »
a bov wont stop overboosting. it wont open under boost as it has equal pressure on both sides of it. as soon as you get off the herbs there is a low pressure in the inlet manifold, high pressure in the inlet causing the bov to open and ahh-choo.

to answer your question, it will keep boosting until the turbo maxes out or the engine goes pop. it's not going to make much of a difference to drivability otherwise.
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XMAN

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No wastegate
« Reply #2 on: August 12, 2008, 09:36:00 PM »
so would it be possible to mount a wastegate in the supply pipe before the intercooler to stop overboosting or maybe a modded bov and have it control boost inlet pressure.
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CortinaD

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No wastegate
« Reply #3 on: August 14, 2008, 02:10:03 PM »
Quote from: "XMAN"
so would it be possible to mount a wastegate in the supply pipe before the intercooler to stop overboosting or maybe a modded bov and have it control boost inlet pressure.


You could use a blow off valve without the pressure line attached and set it to open at a certain spring pressure.
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