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[kevkbuk]

Quote: Originally Posted by TURBO (original)

Hi All,
I have been closly reading about induction kits/CAI systems. The Alta model takes my fancy. But i would like to clear a few things up. I read a post on here stating that one member used a custom cai on there r56 turbo and felt that the turbo was under spooling every time they let of the power and the turbo was less responsive and had to spool up again everytime the accelerator was pushed. Why?

Also can anyone tell me if they feel the same sort of thing with the alta? Because its £200 and for that i dont want a decrease in performance.

Is there a noticable performance increase?

I like the pssssssssttttt sound but i have heard that with these modded induction systems you can hear the turbo spool up quite clearly, is this true of the Alta and other systems?

Thanks everyone in advance.

I've had a similar experience with a custom intake, yes it sounded cool but spool up time between gear changes seemed to be longer and bottom end torque maybe suffered a little. Top end response may have been a little better. But I soon went back to the JCW airbox and the car performs much better between gear changes and is more enjoyable to drive.

The only difference from the Alta setup and what I did is a right angled piece of silicon hose. I certainly would not spend the money on the Alta setup when you can achieve the same using off the shelf parts. Also it does sound better, but the pssst sound can get kinda annoying after a while.

There's a huge thread on NAM about these, but remember US cars have a MAF sensor that we don't have and these can be problematic with intakes.