Please could somone explain how you can reconise a boost leak!!??

 

I've helped out on Mujinas car and his reading before the guage was 9psi and now with the controler off it reads 12?

People are saying it could be a boost leak. I would have thought that if you had a leak to atmosphere your booost reading would lower :confused:

Then i have heard that you gain boost if there is a leak before the turbo and loose it if its after.

 

Could someone clarify this to me please. :headvswal

the effects of a leak on boost pressure are slightly more if the leak is after the compressor and not before, but the effects are ultimately the same:

- a leak at idle would show an increase on the guage (tend towards zero)

- a leak at full boost would show a decrease on the guage (again tend towards zero)

 

if measuring pressure ratio:

- there would be no change at idle wherever the leak is

- there would be no change at full bost if the leak is before the compressor

- the pressure ratio would read lower at full boost if the leak is after the compressor

noones disagreed so does that mean i got it right? :p

I disagree totaly and wholeheartedly.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

But then I dont have a clue what I'm going on about!