im driving 2005 mr

mods:

-turbo back no cats
-filter
-hks recurculating bov
-fuel pump walbro 255ph
-mbc

street tuned

i have the mr gauges

it shows a high spike to 1.5bar sometimes over the gauge and drops down to 1.1-1.3


y does it go so low its so much its like from 21-14psi?

what do i have to do so i hold almost close to full boost lets say 21-20?


thanks guys

 

boost leak....do a search on how to do a boost leak test.

thats my guess

 

what would be the normal tapper for my setup?>



what if i get lets say ams intercooler and hard pipes with t-bolt clamps and retune would that due?

 

17 - 18 psi at 7K w/ o airbox mod...19.5 psi @ 7K with airbox mod...

How is your MBC connected to your WG and are you logging boost?

 

normal taper is 1-2 psi up top. yours is probably a loose IC hose or if youre losing too much pressure, i've heard that you should check the MBC install.

i've never experienced this much loss

you might look at the BOV and make sure theres a tight connection there as well.

 

weird, mines at 22 psi tappering to 16 psi or so...maybe im leaking

 

mbc its connected to the turbo and wastegate acctualator


i cappped out the vga those 2 nipples and intake nipple and bov is normally conectedd vacume to bov


so yeah wastegate accutalator and turbo

?


so ur saying mine tappers too low?

 

The stock turbo will taper about 3 psi after 5500 rpm's. Anybody that says they can hold solid boost to redline on the stock turbo is full of s-h-i-t.

 

depends on the boost controller settings (if you use an electronic boost controller)

but yeah, i would make a boost leak tester

 

i guess i need a psi gauge and wideband man

hmm i dont think i have leaks

i but 2 t-bolt clamps on the up pipe

and the rest seems fine

bov is squeezed hard too

 

true...with my ebc i can get around 1-2 psi taper, but its hard to fine tune to hold solid to redline.

tapering from 21-14 psi however, is not normal

 

i drove on race gas it was holding 1.5bar but than my pipes were coming off and i got t-bolts didnt brake so that was fine


but i had a bad mbc install so the vacume kept coming off


but it was holding lts of boost

does that help?

 

ur parts help u too u have better ones than me i guess

 

are you logging? how do you know how much taper youre getting?

i was assuming you were looking at a gauge

 

but it sohuld be the mbc;s fault it does the same that ebc but mine is only manual doenst help hold boost in any diffrent way so idk