Craigieloon

Bit puzzled about this... Turbo got rebuild as she was smoking slightly. £300 odd quick later she's installed back in. Now i have an ESL chip and before i took the turbo off she was boosting fine at 1.1 bar.. NOW.. i can only muster half that.... Nothing has changed from before when she was boosting fine.... Any advice as to what the hell could be wrong... Ive thought actuator but seems a long shot.. same with solenoid as both were fine last week... Pipes are ok and i have no leaks.... turbo stall noise has decreased as has the dump valve noise just when i rev it... Frustrating.

The turn around time from working fine( but a bit smokey) to now NO smoke but half boost has been a week...

mark28

have you changed the pipe work for the turbo??

Craigieloon

i have new silicon hose for the solenoid top hose to the compressor port on the turbo.... middle hose goes to actuator and bottom hose is left free as im running an induction kit. I have my map sensor pipe T pieced for my dump valve and that goes into the first one 3 outlets on the inlet manifold...
On the inlet manifold the middle outlet is my dumpvalve and the right hand outlet tucks underneath and connects to another pipe under the manifold. To which i presume is the vacuum for the FPR

Am i correct??

Im running a FMIC but i know i dont have a boost leak as id defo hear it... It takes a while to spool up as well..

mark28

i think that sounds right! i would make sure you still have your restrictor in your pipe work.

Craigieloon

is that the metal bit that sits in the pipe that located at the bottom hose join on the boost solenoid... il check that tomorrow... would that really make a huge difference in boost... I aint touched it so cant see how that would have effected it.

Sticky-Wicky

hmmmm

global ignore FTW!!

mark28

yep thats the one.

it did on mine when i forgot to put it back in

Craigieloon

aahh... well il have a look incase its fallen out.... cheers mate.

mark28

i cant see that it would fall out! but check just in case.

p.s its not often i am correct so dont listen to me to much

scoobyschef

iTrader: (6)

changed my turbo last week to vf30 and mapper hadto change restrictor to get full boost

jim

Craigieloon

must be my restricter them.... il have a lookie.... if its fallen out im goosed... is there a bodge to fix it or do i need a genuine restricter??

jaytc2003

iTrader: (1)

similar post the other day from Davey, he was having similar issues. He had switched to a slightly larger diameter pipe as his old pipe perished and didnt put the restrictor in the new pipe.

Craigieloon

Right.. Investigated tonight and im even more puzzled...

I looked tonight and instead of a brass restrictor i have a plastic one... So out goes the theory of it being a restrictor...

Is this correct..



here is my set up..



i found another restrictor on the compressor end to top port of the solenoid.. Is this correct..





then middle port to actuator as pictured below





Any theories????

Craigieloon

bought a second hand pipe with the brass restrictor in it... Does this just bleed to atmosphere or what... Its still only boosting to .5-6 bar

Craigieloon

back up..

The rookie

iTrader: (1)

Restrictor goes in the pipe from the compressor outlet to the T-piece (where the other two legs go to the actuator and the BCS. Basically it restricts the flow to the T-piece, without that the BCS dumping boost to atmosphere (back into the intake pipe) won't be able to reduce the pressure at the T-piece and hence seen by the actuator.

Simon

500

3 ports don't have a t-piece, it goes in the bottom vent pipe.

Craigieloon

yeah.. thats what ive done but boost is still sitting 0.6 bar....