Max performance from 4.2 engine

[Reddy]

Hi I was going thru the AMS performance packages of NissanGTR ,AMS were managing 1000+HP from 4 litre Engine ? Why not from our 4.2 litre engine ? Anyone with Max power output from 4.2 engine ?

[paspaul]

I will try an answer and hopefully someone will prove me wrong!! The problem with the audi 4.2 is that it's a non serviceable block. You can put better piston, rod bearing, ect... but you will never be able to put iron sleeve in it because the "meat" between each cylinder is to thin. You can take a look a motorgeek forum they have some topic on the audi 4.2.