BOOST to 20 psi !!!! hwo to get rid of it

[orzech]

quick note before the story, boost gets to 20 psi with mbc turned all the way down/out

okay so i got a b16g turbo, intake, 1g head, intake manifold, and throttle body. With the stock UICP and BOV it was leaking really bad and i would hit 14 psi with no MBC. SO i finally got my hard pipe and 1g BOV hooked up and i saw the boost go past 20 without the MBC hooked up. So i hook up the MBC and i was hitting 19, i didnt want to hold the throttle down anymore. The car was pulling so much better etc with the hard pipe but how do i get my boost down?


the MBC really does nothing and it is hooked up. I have some boost leaks in the BISS screw, TPS, and a couple small other ones. WOudl this cause the major problems?

I have the stock fuel so i cant jsut run 19 psi. 2.5 downpipe, 2.5 high flow cat, to a 3'' exhaust. stock 02 and exhaust on ported.

What do i do?

 

[oldman]

Is your mbc turned all the way down? If so, try turning it up a little at a time and see if you can hit 17-18psi without creeping.

20psi is not so bad, I use to to creep to 22psi and hit fuel cut. $350 is alot, If you're keeping your 16g, you should be able to solve your problem by porting. If you're going with t3/t4 later, you'll probably want a different setup anyway. I bought a die grinder and carbide burr from one of the members here for like $35, a vise fom home depot for $30 and off I went. It's really not as hard as it seems. You will also gain more power becuase you will be porting the shit out of your already ported turbine housing and o2 housing. I ported my o2 outlet to 2.5" which fits perfectly with my 2.5"downpipe. Just read up again on threads I posted above and take your time. Now I own the tools I bought and really got to know my turbo. Just a suggestion.