What is turbo backspin , and can you hear it????? just installed a boost controller and iam getting a fluctuating noise coming from the intake!!! I dont think it is normal.

 

Back spin can be heard, but usually it's a result of having an aftermarket BOV installed and not adjusted properly. What other mods do you have?

 

down pipe,test piep, K&N intake and if i can get it to work a MBC

 

your car was running/sounded fine before the mbc install?if so triple check your mbc install and all vacuum lines and maf pipe. you didnt reinstall the bov backwards did you?

 

check out the pics in post #2. is that how you have your mbc set up?
https://www.evolutionm.net/forums/sh...d.php?t=114794

 

Turbo backspin is a byproduct in the buildup of boost pressure not having anywhere to go when quickly letting off the accelerator. Having no where to be released it goes back into the turbo. The diverter or blowoff valve is meant to keep this from happening.

If you hear it than it's not normal. Check your BOV to make sure it's installed and working properly.

 

Like everyone said, double check your tubing... also... I hope you have a boost gauge, because a boost controller without a gauge is just silly

 

you have MB ,and you adjusting it? You have a proper knowlige to do it??
If you not, then better if you ready to spend money...

 

I've seen guys put the stock BOV in backwards and it reacts exactly as your saying. Let us know what you find.