Too much boost

[dc90ms]

so after getting my car done i was driveing it around not going past 6k still fresh motor and my stock boost gauge looked like it was going to high up so i go a after market on put on and went for a run around 5 k the boost went up to 25psi on my guege ohh and it blow the vac like off the boost gauge. i have the vac line hooked up to the wastgate. goes form wastgate to manifold. it is fast as hell hahah i got stock 450cc injectors and a 255welbro pump in it so what should i go to bring that boost down to 15. ohh i just got this turbo in its a 16g big ported to evo 3. help please dont want to blow her up.


6 bolt swap
stock 6 bolt pistons stock moter bored out

 

[1gDSM4g63]

I'm assuming you have a boost controller right? And get a wideband if don't have one so you can tell what boost is safe. Also update your profile, it would make it easier to help you if we're not whipping through weeds.


Please write better it's hard to read.

 

[dc90ms]

i just got a ebay knock off one

i dont have a wide band ether

 

[1gDSM4g63]

If you want to lower your boost than adjust the boost controller and until you get a wideband there is no way of knowing what boost is safe. And do you have an AFC, DSMLink or EMS? How do you control the fuel injection?

 

[dc90ms]

with my stock ecu i dont have anything to contoler it and i just dont no if it could be the wast gate or what but its giving to much boost

 

[1gDSM4g63]

Adjust the boost controller to lower boost!!!

And I'm sorry I cannot help you out more, I don't know about your car. All I can say is that you need a wideband, better boost controller later on, and something to control your ECU. It's meaningless to have a fuel system and 450cc injectors if you have no controller.

If you continue to ran your car like this I'm pretty sure you can kiss your engine goodbye.

 

[blownturbotsi]

While you're breaking it in, I'd say you should just run a line from the wastegate to the compressor housing so you run spring pressure, but that's just me.

 

[dc90ms]

ok my wast gate inst opening at all now

 

[GnArKiLL70]

bad WG? check all the lines for holes and make sure the flaper is not just stuck take the arm on the flaper and see if it moves..


oh and ebay mbc FTL!!! you can get a turbo xs mbc realy cheap look in the classifieds

 

[DougR]

The simple solution, Hook up the OEM BCS! altho its probly to late! Do it anyways!
As of no boost, you have probly blown off another Vacume/Boost line...
Do a boost least test ASAP!

And for peets sake get some form of Logging and Fuel controller!
Or kiss that Engine good by!

 

[blownturbotsi]

If the wastegate isn't opening, that would mean that you'd boost all that the turbo has to offer. If the wastegate is stuck OPEN, that's when it'd have no boost.

 

[daren_p]

If the actuator isn't opening, check to see if its physically binding on anything. If that looks good, hook up the actuator to a compressor/regulator & apply pressure to see if the actuator move (10-15psi). If the actuator doesn't move it needs to be replaced, if it does move you either have an issue with your source for the actuator, the way the MBC is hooked up, defective MBC, etc.

 

[r1991_4g63t]

are you looking at it while reving it up? it wont move unless your actually driving it