Boost hitting 1K later

[Araesk]

As the title says, the boost in my car is hitting 1k RPM's later than i'd normally feel it. (Mods I know of: 16g turbo {not sure if small, big, or evo3}, and a full 3'' exhaust all the way back).
Here's what went down. I was redoing my strut towers, and in the process my hallman pro mbc came in the mail so i installed it to test it out when I finished the struts. I installed it properly, and when I was running with it last night, I could see the boost hitting at 3k RPM's (and feel it) and then by 4K it would be at 8-9 PSI and maxed out. I felt the car respond much faster than it did before, and I only imagined what it would feel like higher up so I did what any boost lover did. Played with the MBC. I read the controller, and turned it about 1'' to where it would be increased. Hopped in my car, and went speeding off. Only the boost was hitting later, and I felt not nearly as much despite my gauge saying the same amount was being pushed.
I tried playing with it more later in the day then, and trying to push it higher thinking maybe I did it backwards some how. I was turning the other way, and after a brief point I felt it tigethening, it proceeded to start feel like it was loosening again; so I went back the original direction I did the first time, feeling it tighten for a little, then get back to loser again. I'm not quite sure what's going on with it. I just want my boost back and to be at 3K RPM's again. Thanks for reading this wall of text!

 

[Trilogy Turbos]

Remove the MBC and have it set like you had before. Use new vac hoses. Drive the car and see how it performs. If it went back to how you remember it, re-install the MBC. Again, use new vac hoses. Check the old ones for rips or punctures.
Regards,

TRILOGY TURBOS

 

[Araesk]

I just hate letting it all cooldown so I can get at it. I'm so impatient. But how would the hoses go if I felt it with the MBC last night, and then today after I messed with it, it's less?

 

[Kdouglas89]

I just hate letting it all cooldown so I can get at it. I'm so impatient. But how would the hoses go if I felt it with the MBC last night, and then today after I messed with it, it's less?

Remove the mbc from the hoses to release the built up air. You could have turned it up to high, and split one of the hoses. Even a little crack will affect it. Put soap and water into a spray bottle and spray all your little air hoses to see if it bubbles.

Kevin

 

[Araesk]

Didn't think that one through. I'll take them off when things are a little more cooled down and then go ahead and test them. Hopefully it's something simple like that. *My wastegate nipple is 1/4'', and the hose that connects onto the MBC is 1/2''. I stuck the old 1/4'' hose into the 1/2'' line and then used a clamp to hold it down. Could this be effecting it?

 

[Kdouglas89]

Didn't think that one through. I'll take them off when things are a little more cooled down and then go ahead and test them. Hopefully it's something simple like that. *My wastegate nipple is 1/4'', and the hose that connects onto the MBC is 1/2''. I stuck the old 1/4'' hose into the 1/2'' line and then used a clamp to hold it down. Could this be effecting it?

Just go to autozone and buy new lines. Its like $0.80 a foot or something cheap. Buy the correct sizes as well. Btw, you squirt the soapy water on the lines while it runs. If theres a hole or rip, it will bubble where you have ripped the line.

 

[Araesk]

How should I attach the 1/2'' hose onto the 1/4'' nipple? It slides right on off, I didn't even bother trying to clamp it because it's just way too big. But cant I just take all the lines off and run water through them and plug the ends and it would squirt out?

 

[Dude McGee]

Pick up a male reducing barb with a 1/2 barb on one side and 1/4 on the other. Put it in. Couple zip ties. Bam. Any good hardware store should have it.

Dont fill the lines with water. It would take pressure to force it out of small cracks, where air would escape easy. Just boost leak test with a spray bottle of soapy water and spray it all over vac lines/connections. Also zip tie or clamp every vacuum line on the car, even if its not leaking right now, because it will eventually.

Good luck, keep us posted on results.