Compressor wheel bore to small for shaft

[Jkole4]

Hi I bought a new comp wheel for my turbo and the shaftbore is to small so it doesn't fit on the turbo. The turbo is a gt3071r could I just drill it out to fit or do I need to get it professionally done?

 

[ScSmooth]

IMO.... If your not really good get it professionally done.

 

[Turbo2g]

Where did you get it? Why not return it and get the right one? Shouldn't need to modify it if it's supposed to be for your turbo.

 

[JusMX141]

If your drill is even off a half a degree it will vibrate badly enough to break the shaft.

You shouldn't be changing compressor wheels on ball bearing turbos without a VSR balance of the assembled unit anyway as there's no way to do a plane balance of the rotor group- ball bearing turbos are extremely sensitive to vibration which can cause a catastrophic failure if it's excessive.