MBC - Bleed valve - Opinions?

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Whats the best?

Bleed valves are cheaper, but my mate with a tuned 220 turbo is telling me that they are better than an MBC?

He also said, dont touch the actuator, as it was a bad idea.

I have a decent boost gauge on the way, and this should let me see exactly what my car is making. Once i have this in i want to up the boost a bit and see how well things go :p Oh, and why does the price of bleed valves seem to vary so much, all they do it leak to atmosphere through a valve right?

Im more interested in useable power and boost, not a massive kick up the bum as the turbo goes nuts!

So, whats the best option?
 
Ahh, i seee...

So, the bleed valve is just an adjustable perm bleed from the pressure line to the atmosphere.

The MBC actually holds the actuator untill full pressure is reached, then lets fly, so you get no boost - then full boost?
 
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