Try boostin in different gears. I notice I boost less in first and second, but I hit 1.4 in 3rd

 

Mine is not that high and definetly drops to at least 1bar

 

Maybe try getting better gauges?

My Defis are much easier to read. I never knew I hit 1.4 until I got an aftermarket boost gauge haha.

Those stock ones are tiny

 

the original gauges are in bar (kg/cm2)

 

i'll throw this out there one more time since it was kind of ignored-do a boost leak test. you're boosting less than a stock evo should and just because it's stock doesn't mean there is no leak.

 

also varies with elevation i believe...and the guy hitting 1.8 bar with dp and no tune...thats a bit high

 

spot on

 

oh also forgot to add, my car was maxing at 15 psi stock with aftermarket gauge. since i got my tune and forge mbc its been solid.

 

so you're covering up your leak in the piping system by turning up the boost with an MBC? you should always perform a leak test prior to a tune.

 

i just installed a catback on my stock ix and now it will spike to about 21-22psi sooommetimes usually 17psi and immediatley drop off to about 15 and when it drops off you definatley feel the whole car jerk....i did a leak test and found nothing are there anyother boosting problems besides leaks?

 

is the snorkel to your airbox fastened down securely? sometimes it'll suck to the hood and cause a jerk/drop-off in boost if not secured.

 

i have a intake adapter filter so theres no airbox...but even before the intake and exhaust the car did the same thing just not as dramatic or harsh. i even tryed taking out the snorkel and it made no effect...

 

do you have a tune? you could be hitting fuel cut if not.

 

no no tune yet but isnt fuel cut at like 7200 or so i hardly get to 7000 it only does it at wot

 

fuel cut can happen at any rpm that your under full boost. get a tune for sure, i think you're hitting fuel cut.