hrmm car shake at full throttle

[dzolcali]

car shake at full throttle...?

anything over 4k the mirrors shake and the car sounds like it will explode but it's beasty none the less. The mbc is set to 7-8 psi or there abouts car is reletively stock minus an intake and filter.

new motor mounts? it's got 111k on the odometer

 

[pballer]

so... it seems like an ignition problem? lack of power? does it idle smooth? did you check the spark plugs?

 

[95blackGsTurbo]

Does it hinder performance at all of just shake the car? And how are you getting 7-8lbs of boost. A MBC can't go lower than the wastegate. Your profile doesn't state a boost gauge so it's impossible to tell.