Rep Power: 329

I just got done replacing the flexible intake on my turbo w/ a hard pipe and went for a test drive. The car was still warm from be driven 2 hours earlier so as soon as I pulled out of my street I ran it pretty hard, including a hard 1st-2nd shift that might have gone a few hundred RPM's past 7,000.

Everything seemed normal untill I got back in my driveway and the car was vibrating at idle. The engine idles at 600-800 RPM's like normal and revs freely, but as soon as it gets back to idle the whole interior vibrates.

As the revs clime the vibration becomes less, but I can still kinda feel it through the floorboard. I thought I may have damaged my clutch or flywheel, but theres no vibration through the clutch petal.

Does anyone have a clue what my problem is, and how I can fix it?

 
Rep Power: 0

Does it idle like it's about to stall (i.e., rpm falls below 500) , or is it just a constant shaking at 600-800 rpm?

Try putting the old flexible intake back on and see if it still does the same thing.

 
Rep Power: 329

It turns out that I broke the front engine mount into 3 pieces! The mount is going to cost me about $100.

I wonder how much torque it takes to shatter a mount like that.