As you might be aware, all is not well in the RB30 camp.
There are some under lying issues with a number of areas.
1) The honeing was not plateaued,
2) #5/6 were 0.001" bigger than the rest to avoid expansion seizure which brought the piston/bore gap upto 0.006", this is way in excess of the norm.
3) Possably ignition scatter with the AEM, although not confirmed.
4) I really should have used 98ron fuel(that'll teach me to be tight)
All these are contributing factors to DET.
Next step,
1) Check bore to crank alignment and bore,hone and plateau block to 87mm.
2) Order bespoke pistons. There is nothing off the shelf to use.
3) Fit crank position sensor. I can use the AEM to measure the difference between CAS and crank. Should be interesting..
4) Re-build and try again.
The results are very good(525hp and 560ft/lbs @1.5 bar @ wheels), if only the engineering was good then I would be doing all this..
