i've had 10-8-12 pattern and tonight im having a 10-8-10--->8 and holding. what did i do?

 

It's getting warmer. Harder to take already warm air and turn it into pressurized air. ANd with nothing but a dp for flow mods, your twins can't make 10 psi post 6krpms (just a guess, it's the usually dropoff point).

 

could that really cause that much of a change? i mean 4 psi, wow, what should i do?

 

be happy you have a normal boost pattern maybe??

 

check your cat. loosen up where it bolts to the dp and shine a light in there to check if its clogged. if you see fine mesh you are ok. otherwise, that might be it.