I'm currently getting a 10-8-10-7 boost pattern.
After 4500 rpms, I drop to 8 and quickly go back up to 10 like I am supposed to. However, the boost immediately drops to about 7 after that (probably by about 5000 or 5500 rpms). My only mod is a dp.
Anyone else have this problem before? I'm hoping someone can narrow it down for me before I go checking the whole system.
Thanks,
Matt

 

Check the classic culprits: crossover tube from y-pipe and it's couplers. Sounds like you're a likely candidate.

 

My car always did that from day one. I think its suppose to infact. With all the mods i have on my car, my boost pattern is still a 10-9-10-9. It seem like the efini y pipe brought it up 1psi or so at redline. CJ

 

I got a same problem.

and my car not getting full boost(7PSI) before car warms up is it normal I think it's double throttle but not sure.

someone help!!

 

HOw much is the efini Y-pipe? and where should I get one at>?

 

It could be some check valves, the valves may not be holding enough pressure or vacuum to keep the actuators open/shut for long enough.

 

Factory spec says after transition you should see steady 10 psi boost untill at least 6500rpm and then it may drop to 8-9psi at 8000rpm (redline) stock.

 

sounds like your main cat could be clogged as well