Apologies for raising an old thread, but it's not covered here.   Is the AU XR6 VCT topend worth playing with as far as the head goes?    Would the VCT itself work with the EA cam, I'd assume if it did, the VCT when it kicks in would make the profile a bit more aggressive again compared to using the cam in non VCT cars.   Sorry for the dumb questions there seems to be limited info on hotting up an NA VCT engine outside of locking the cam and using the non VCT cams.

Is the XR6 VCT topend worth playing with as far as the head goes? or should I be looking for a different head like the EF XR6?   I have the correct EEC to suit the VCT with a 5 speed.   I was thinking of running a Barra ECU for extra tunability would it be worth going to an FG coil pack arrangement?   I have what I assume is the stock XG engine as well with everything needed to run that so swapping parts is doable for sure.

Thom's thread is the business when it comes to those motors. Might even find the answer to your first question in there somewhere too.

Aaaah yes the plenum.   The bane of all XA-XF Falcons.....        Well, that will still go hard, and sound sweeeeet.!

Thanx,14x8 on this one 😁👍

http://www.ozfalcon.com.au/index.php?/topic/1233-thoms-40l-thread/&   Been reading this thread, very interesting read indeed.   Seems all I need is an EF XR6 head to build thoms combo, got all the rest of the parts, pretty sure the XG cam is the 91DA cam spoken about in the thread.   Would come pretty close to getting the XB into that magical 13 seconds bracket I'm chasing.    

I personally would rather stay as close to a standard bore as possible. It also depends on what you are trying to do, such as, are you going for all out performance or a mild combination... also are you thinking cast, hypereutectic, or forged piston's? There is a lot to consider when building engines... e.g. taking a block out to what is considered maximum, can bring on other issues, like the cooling system may need to be upgraded and the possibility of split bores, and boring out to max also reduces the amount of area for the head gasket to seal against, as the distance between bores is less... Some 265 Hemi 6 blocks can be bored to 90 thou, taking it from 3.91" to 4.00", which all of a sudden opens up a more extensive range of possibilities... Sorry I don't have a direct answer to your question, just some food for thought...👍

Awesome wheels! I have a set of 14x8's, but yours look more like 9's at least. Are they 14's or 15's?  

*crickets*

So, I found an ED ECU in my parts collection that was the correct part number! Installed, and problem solved with no money spent.