so i just did the full 3" turbo back. no problems there. then a few days ago, i did a turbo xs mbc. i've got it set to 20-22 pounds of boost. it runs smooth until 19 pounds then it bucks one time, and keeps building boost until it spikes then tapers off to 16-18 pounds. im not concerned with the tappering off of the boost. what could be causing that bucking? any comments would be great. thanks.

 

the bucking could be boost cut...not sure.

Whats your mod list and are you tuned?

 

intake, full 3" turbo back, greddy type-s(one spring). and i'm untuned.

 

i would recommend a boost leak test for the boost spikeing.

 

thanks. but im not worried about that for now. only the bucking of the car.

 

do not increase boost levels without being tuned

 

^The post above me, read that modding for dummies. No offense. But you should not install an MBC without a tune. If it is bucking around 5500-6000? If so are you still using your stock plugs?

 

Get tuned, its probably boost cut. I had that problem and it was solved after I got tuned.

 

boost cut i say i have the same thing it bucks wild and kills all the fun.

i got it after adding the final piece to my turboback setup.<----o2 housing

 

Sounds like boost cut.