ok rebuild my engine about 3500 miles ago all was good. so i headed to oregon froim mn got here did my thing and what ever. well today day before i head back home i let the car warm up like i always do then i jumped on the road and at about 3-32hund rpm the car made a fluttering sound but a little worse almost like a grind fluddering sound but i was on the highway so i cept driving to the nearest stop but by then it stoped when i got back home i took off the boot to the turbo checking for turbo play there is non on the intake side it only happens when the car hits boost the first few times then it stops its driving me nuts. o ya new subaru short block not rebuild bottom end.
It sounds kind of like a leak. Did you have your timing belt service done yet?
Its kind of hard to hear it but it sounds similar to my turbo before it blew, the oil lines were clogged. Not sure if they removed the banjo bolt