Well basically my pipe off my turbo has worn through! Its been rubbing on the driveshaft!!

Im getting custom pipework made up in 57 mm to match the rest of my fmic!!

Now it worrys me looking at the oem pipe!! Internal diameter measures at 40mm!! Why is this!? Surely this is holding the car back straight away???

Its because the car was designed for more than out-and-out power, and the turbo is essentially an off the shelf unit , the designers will have taken into account power curve, emmisions, driveability, economy and a whole plethora of other factors. it wasnt just a fun spoiler

Its because the car was designed for more than out-and-out power, and the turbo is essentially an off the shelf unit , the designers will have taken into account power curve, emmisions, driveability, economy and a whole plethora of other factors. it wasnt just a fun spoiler

But why is the pipe soo small!? Its even smaller than the rest of the oem pipework!! Surely this is pointless? Im guessing having bigger pipework off the turbo will help my bhp figure? Turbo is a stage 2 pd150 garrett

It's designed like that for volumatic air flow and rapid rise in boost pressure, a larger bore pipe will introduce turbo boost lag, and probably throw out a fault code as the absolute boost sensor on the SMIC will get confused.

It's designed like that for volumatic air flow and rapid rise in boost pressure, a larger bore pipe will introduce turbo boost lag, and probably throw out a fault code as the absolute boost sensor on the SMIC will get confused.

I dont run the smic?? I have a seat sport fmic and larger turbo? Surely the smaller pipe is holding me back??

Bigger isnt always better, you may be right though and it might help, but without knowing all the paramaters you will just need to take the risk if you intend on going that way, it may be that the reduction on inlet aligns the air into a laminar flow instead of turbulent flow, in which case it will probably be more effective than a gaping pipe on the way in.

But at the end of the day without proper trialling, calculating and CFD modelling its near impossible to say yes or no.

My intercooler system is only about 50mm diameter. No need for big pipework as this will mean more lag. My turbo spools up nicely now thanks to not having too much air to fill (still flows well though )

My intercooler system is only about 50mm diameter. No need for big pipework as this will mean more lag. My turbo spools up nicely now thanks to not having too much air to fill (still flows well though )

Yeah ive just measured mine my egr delete is 64mm then the rest of the forge pipes are around 50mm then at the turbo its 40mm!! Am i right in thinking flow comes from the turbo through the intercooler then upto the egr and inlet?? Would i be right? Or am i totally wrong??

My intercooler system is only about 50mm diameter. No need for big pipework as this will mean more lag. My turbo spools up nicely now thanks to not having too much air to fill (still flows well though )

Yeah ive just measured mine my egr delete is 64mm then the rest of the forge pipes are around 50mm then at the turbo its 40mm!! Am i right in thinking flow comes from the turbo through the intercooler then upto the egr and inlet?? Would i be right? Or am i totally wrong??

I thought the pictures above covered that first time

I thought the pictures above covered that first time

Double retarded post from my iphone now i understand!! Just watched shutter island now i dnt understand that!!