HELP!? Bad knock in RB20 @3K+ RPM

[TurboX]

Just finished replacing Turbo/HKS Exh. +3"Dump/CAT/Headwork/HKS HGasket/P&P etc. NOW find on Dynoing, its got a bad knocking noise over 3000RPM.

Has been off the road 12 mths so driving around keeping the Auto in O/D to keep revs under 3000. (Stalls 2800)

Hell I have to get some K's on it after all this time.

Even though its got 550cc RX7 inj's its running very well with my double flow AFM Mod compensating but a bit on the rich side at revs.

Sounds like its coming from the top of the cams at rear cylinder.

This WAS the cylinder that the H/Gasket blew through to the water jacket after coroding though as I was on the fourth run of the night at Calder drags.

Have I hydrolocked it and stuffed the bottom end somewhere?

Bearings etc probably took a lot of water in the oil also before I realised.

Also the oil pressure is only reading 2 on the gauge most of the time but it always has and was told by others that is common on GTS??

DAMN, I can feel the power potential as its much better than before when it Dyno'd at 160RWK even now running a bit rich and way out of tune on only 10PSI!! :wassup:

How long before it goes BANG and I need to do ....... WHAT?!?

1. Replace bottom end components with parts from NA RB20 I have.

Cheapest option But who could do this AWD eng out in Melb at reasonable cost?

2. Replace BE with GTR Crank/rods/Pistons to fit = 2.4?

3. Replace everything with a stock Stagea RB25 (to suit AWD)

I have put a lot of money and time and sweat into this thing and really want to be a Troy and persevere with the RB20. :Oops:

Sorry for the long post but its got me screwed at the moment..