BlackCobalt707

iTrader: (5)

yes i iz

jimbos'ss

iTrader: (2)

short term fix imo, another thing to check is the BOV spring if its properly speced, if its too soft it will blow off with very little vacuum, i know on the lsj i get almost 18inhg at idle and as high as 20-22inhg while cruising, needless to say i run a 9psi spring with no issues in the BOV.
another thing to not is loosening the tension on the wg rod will most likely cause boost to fall of at higher rpms especially when using a MBC.

mkriebs

No, its not a short term fix. If he never got it adjusted right after the install, it needs adjusted. Not saying its going to fix it, but I think it will help. the BOV needs a softer spring so that the vacuum can blow it off easier. I think I said harder in the previous post... my bad.

jimbos'ss

iTrader: (2)

no, higher springrate will delay the BOV from blowing off to soon, i.e. under low loads or less than 1 bar actual. the only risk is running to high of a spring rate and the bov not opening under normal vacuum causing the turbo to surge.

BlackCobalt707

iTrader: (5)

this is one of my issues as well

mkriebs

Yeah, so he wants a lower one. he has a 7 lb spring in the WG, and prolly a 14lb spring in the BOV. Should be close to the same.

jimbos'ss

iTrader: (2)

electronic boost controller my friend easiest cure. adjustable gain% makes them priceless in preventing it, also the solenoid does not work like a MBC allowing a boost leak to generate more boost, its a closed system so you will get better boost response.

mkriebs

Well, you are running quite a different setup, right? Do you have an internal WG? If so, you can adjust the rod to get rid of it falling down at higher rpm.

jimbos'ss

iTrader: (2)

a lower psi spring will make it sneeze more often, a higher psi spring will make it sneeze less but stronger sneeze.........best way i can explain it.

mkriebs

This, and the WG rod. If the rod is not set to have enough pretension, then its gonna be open half the time.

jimbos'ss

iTrader: (2)

meh you guys and your internally gated turbos. strong wastegate tension is important on them or else you will get boost falling off. on the other hand strong tension can also lead boost creap and boost spikes........external wg ftw.

mkriebs

Agreed. I will only run an external if I go anything larger than a GT28. the lil K04 doesnt need one though.

Tundraboarder666

MAF sensor issue? MAP sensor issue?

mkriebs

No. Neither of these have anything to do with boost on the LAP.

BlackCobalt707

iTrader: (5)

yes im internally gated and i do have a AEM EBC. but im bout to put my car up on ramps and see if i can adjust the wga rod any more. it should be fully closed but just in case ima check. im liking this thread, givin me plenty of info. thanks guys, please continue with the conversation

09blackonblack

iTrader: (1)

HOLY **** GUYS!!! im confused now one says do it one says dont.. lmao... the wga rod is in the same position it was when i got it... the bov is the factory one that is recirculated... should i maybe get the dejon spring? thanks for all the answers so far.

jimbos'ss

iTrader: (2)

IMO we gave you a ton of info to base your decision, take your time read it over do what is right for your situation.
for every solution we gave an explanation

does it have adjustable gain% of some sort, not that familiar with the AEM, once setup it should limit boost fall off at higher rpms to around 1-2 psi. all things working correctly.

09blackonblack

iTrader: (1)

after the bov releases it does fine... which is weird

no doubt... plenty of info... while cruising in town i figured out that if i bump the throttle to boost and blow off it will cruise through town perfect at 10# vacuum... which leads me to believe its more of a bov issue... i also have the boost gauge tied into the bov... could that be causing a false read on the gauge and the bov to not be working properly?

BlackCobalt707

iTrader: (5)

Yes it does, but currently I'm using a mbc because it seems to work better

09blackonblack

iTrader: (1)

ok guys, heres what im going to do... back the nut on the wga rod 1/2 -1 turn and order the dejon spring to increase the pressure on the bpv and install the mbc i have. and cross my fingers.

im using a thin silicon hose for my bov which ive thought it could be possible that its collapsing under vacuum and bleeding off the suction on the bpv causing it to build boost too soon...

jimbos'ss

iTrader: (2)

sounds like something is going on with the bov to me as well, i'd run the boost guage on a separate line as the bov for sure.

09blackonblack

iTrader: (1)

i took out the spring and checked the rubber flapper... its fine, but while i had it out i stretched the spring some to add more force to it, and guess what... it helped it a bunch on the in town driving... tomorrow i will add another nipple for the boost gauge and see if that helps any. i dont think the turbo is too small, i think its just not properly set up/ almost too small... cant wait to hit 12 psi! i might cream all over myself.

hungryhip-ccp

iTrader: (2)

looks like jimbo wrapped this one up!


How germany treating you?

09blackonblack

iTrader: (1)

yep jimbo helped the situation, its better but i think i either need to add a washer or a stiffer spring.

jimbos'ss

iTrader: (2)

good actually, had a little fun with the balt a couple weeks back, 2 1/2 hour cannonball run to the border of austria averaging 120mph........that'll test your motor lol