Sw20 turbo engine knocking

Hey guys

In need of some serious help if you guys can help out
Im new to this site and first
Bought my mr2 bout 3 or 4 months ago
I had no idea what was done to the car,
Basically looked standard to me besides hks pfc with hand controller mix controller fuel defender and so forth, had a intake plenum leak which I fixed.
Now on Thursday a friend borrowed it and drove to woop woop good couple of hours Friday morning going to work I heard a bit of a knock when I backed of the throttle only on 2400rpm,
Checked the oil and filled up a little to much, drove home yesterday flushed out the whole engine changed sparks oil filter, and the small knock was still there last night took it to a dip wit mechanic which opened the rocket cover I noticed it had hks cams "well they were marked hks" now I had a small vac leak he changed the line and said cars fine u can drive it home at this time he drove it I Culd hear him fanging it, anyway I jumped in the car and from a small knock its turned to continues knock even from idle now I got no idea what it is, the car did loose a bit of power but still went fine till the "genius " decided it's okay now i can hear the turbo still boosting but the knocking is unbearable so if anyone knows what it is or can help me would be highly appreciated or if there's a actuall proper mechanic round melb
Thanxxx

Thanx for that its the bottom end so now gotta decide what to do and which way to go,,,

Sounds like your 'friend' has little respect for you or your car...

MRTurbo

detonation is a killer...

Pinging (detonation) and Bearing rattle/knocking  are two different things, Just saying....
 
for mechanics in melbourne, depending on what part your from theres a few options but everyone  seems to go to IDB or ANSON auto in richmond they are next door to each other.
 

Definitely pinging/detonation or just knocking?  Have you ruled out things like engine mounts/suspension mounts etc if it happens with any of those things?
 
Recommend IDB over Anson Auto.
 

A quality video of the rattle/knock with sound can speak 10,000 words.

I spoke to Ian, and he said possibilities is bottom end but can't guess and actually have to open the block to see what's been done to it by previous owner weather it's worth fixing or replacement motor, so yesterday was first day started working on it, if i have a decent motor il probably rebuild it depending on the extent of damage,,,

Finally the engine is ripped apart and by looks so far definitely bottom end and engine has been opened up before most Likely by some one that loved blue silicon, but now the decision of standard build or forge and go all out?,