When I put my foot down, my car boosts up like normal then when I let off to change gear it makes a funny squeek noise like a shoe on marble floor if you drag your feet??

It squeeks for less than a second but its quite loud. Could this be the hoses??

They are standard hoses running 15psi and feel a bit soft but would this cause a squeek if they are fucked??

Also its losing boost in the higher rev range when its got a new -31 actuator on going to as low as 11psi sometimes??

Sound like fucked turbo, hoses or something else??

Any help appreciated thanks

 

Proably the turbo flutter as its known, can sound weird sometrimes lol

You won't hold boost on a MFi system, it's not made for it

Only advice I could give is get some silicone hoses anyway, for the price you can get them at it's worth every penny IMO

 

What do you mean by MFi can't hold boost?

 

Well, say you peak at 1.7bar, it certaily won't hold that all through rev range

You'd need some kind of boost controller

 

ah ok