audi a4 20v non turbo cylinder head question


New member
uk wales
audi a4 b5 20v 1.8
Hi guys I was wondering as I got Audi non turbo but I want to put big port head from turbo model same base engine so I was wondering is it fits and is it going to work ??? Thank guys
Unfortunately I have no experience with Audi BUT why do you want to do this??
IF the car is staying NA then you may well lose performance as the intake velocity will be slower due to the larger ports and the cylinder fill less due to the lack of positive pressure supplied by a turbo.
The turbo camshaft may well be different as well.
IF you do change the heads then you will need to port match the NA inlet manifold as the smaller runners will harm the flow due to turbulence where the small runners meet the larger head ports OR use the turbo IM

Just thinking out loud FWIW ;) :)
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