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Hi guys,

Apologies, I know this might seem like a stupid question to some of you.

I've just bought an R32 GTR. Link ecu, single turbo etc. 

The crankcase breather setup is- all stock except breathing into a vented catch can instead of feeding back in before the turbo. Now based on previous experience this makes for a huge vacuum leak! 

Tonight I tried blocking off the pcv and simply breathing both valve covers into the catch can. The car idled at 900rpm (usually 1100rpm)  and sounded slightly less 'lumpy'. The car is currently on stands so can't drive it unfortunetly.  


My question is...is it possible the car was set up and tuned with the stock but vented set up (vac leak). Or is that likely an uneducated modification by a previous owner. Obviously no mafs with the link ecu. But I cant see how the ecu can measure the air coming in through the pcv valve when off boost.

Thanks heaps, Luke



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The ecu has sensor measuring manifold pressure not airflow.

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Understood thank you.

So that vac leak off boost (PCV sucking air through vented catch can) isn't  going to cause any issue to the tune?

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