Today I installed 710N's (which was a real PITA) on my stock 2003 911 Turbo 6MT non-X50. I noticed once driving that when I let off the throttle it seems to hold boost after whereas before it would immediately recede to zero (this is measured based on the dash gauge). Otherwise it feels a bit different and I'm just not sure how to categorize it.

Is there something I could have done wrong?

Is it a better mod with a tune (I do have one on the way)?

What should I be noticing currently and what are common irregular issues?

Thank you for all the advice! I searched for half an hour and couldn't find anything that pertained to this.

 

They should be releasing pressure immediately after you release the gas as that is their entire function. They are mechanical so it should have nothing to do with a tune.

 

anytime you get in that part of the pressure side of the car... you need to do a proper pressure test...
do a search I posted one... trust me...