after fitting a new turbo and headers at the weekend and now only running 0.5 bar boost been told that I need to change the olive in the boost control solenoid pipe

the turbo I removed was a td05 and I fitted a vf23 with roger clark motorsport unequal length headers

would anyone know what size olive I need to restore some sort of normal boost?

 

its within the vent pipe from the 3port boost solenoid or in the pipe between the compressor cover and the T piece if you have a 2port.. you don't mention if the td05 is the original turbo and iti s therefore a 93~96 or if the td05 is fitted to a newer car etc etc..

Simon

 

The fact that it's only running half a bar makes me think it may be that your plumbing is all wrong anyway, although the restrictor/lack of it may be a part of the problem. And as Simon said there are a number of different turbos, layouts etc that make things a little more complicated.

 

sorry forgot to put what car I had

it's a '95 sti so the td05 was the original turbo as is the 3 port boost control solenoid

I have checked the plumbing and it appears to be correct

it is piped like so;

top pipe goes to turbo housing

middle pipe goes to actuator

bottom pipe goes to air filter pipe

 

check for intercooler leaks, wastegate arm connected etc etc

 

also header / uppipe leak

 

I've checked and there are no leaks from the up pipe or intercooler and it's done nearly 300 miles today (80-90 all the way) with no problems except it is only running 0.5 bar of boost

I really need to get this sorted as it's doing my head in