I'm don't know much about forced induction but my friend just got his motor built. He has a 95 civic with a automatic to manual swap, and had a crv motor put in with his single cam turbo kit on it from his old motor(small turbo).Engine mods. crv-wisco piston(8:1 comp.) with eagle rods and all new bearings,skunk 2 intake,GSR HKS turbo manifold,RC 440 injectors,blitz blow off valve,3 inch cat-back.The guy who built the motor said it had floating wrist pins and that they would make a noise, but at idle and on the gas alittle the motor makes a knocking noise,when he gives it the gas in the upper RPM range the noise goes away-does any one know what it could be.

 

called piston slap, which all forged pistons do till they are warmed up.

or it could be a spun bearing ect ect