just been shortening the pipes on my 3 port boost solenoid as they were all 4 foot too long,
i noticed that in the pipe that goes to the top connection then to the turbo there is what appears to be a man made restriction or a piece off threaded bar with a hole drilled down it has anyone any ideas why its there and do i need to put it back in

cheers

 

hi thats the resrictor pill and needs to be refiited straight away,very important as its for controling boost mate

 

sound i will go put it back in

 

cool mate, they are diff hole sizes just depends on model sti/wrx,should be fine if you refit it.

 

What version of Impreza do you have, if it's a newage and you've fitted a 3 port, it needs to be removed.

 

its a classic 97 with 400+ bhp if thats makes any difference ??

 

Yes it does, leave it in

 

cool ive put it back car seems fine just need to try and minimize the lag next