[N0DIH]

I must reiterate what I said much earlier in the thread. The idea isn't to make it a highly refined turbo 4.9L. The stock block/rotatingassy/pistons can't handle it. You will blow it apart. The only way it will survive with this high compression without changing it is to make it a POORLY matched turbo/engine. This isn't optional unless you are tearing down the engine and beefing the snot out of it. You are dealing with a weak crank, cast pistons, non o-ringed head gaskets, aluminum block, no knock sensor, no PCM management, etc.

So with the high compression, a larger than it should be turbo is needed. You need to let the engine make the cyl pressure at low rpms, and let the turbo make up for weak camshaft at higher rpms. You NEVER ever want to overrev it, you never want to get more than 6 or so PSI boost with a stock cast piston. Heck, the LT1 shatters pistons with the pistons it has over 6 psi.

So, ensure you are NOT well matched. You do NOT want boost early, you want it later. Remember that Illumina has this planned in stages. Stage 1 is like this, Stage 2, however, it gonna be fun!!! Then we can match it all up well and make it a killer engine. IF the block and heads can take it.....