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Im setting up anew laptop here for tuning. Ive loaded OSE V1.11 and when i open the V8 stacked bin there is no values, but all the others are ok.
Am i missing something here?

yes, don't open the stacked bin, open the non stacked, or split the stacked one then open one of the resultant split bins.

Ok thanks I must not of ever opened that one before.

Can someone answer this for me?
The fuel regulator has a vac hose connected to manifold vacuum.
Can a constant fuel pressure regulator be used and ve table tuned to suit?
As the fuel pressure directly relates to manifold vacuum and the map reads this I would think
it should be easy to tune the ve table to run a constant fuel pressure.

well you can only try, but you might find that you can't make the numbers low enough to get it at the right AFR.

but I have to ask, why would you not want to have the regulator ?

Would the injectors work correctly though? The manifold vacuum referenced regulator maintains a constant pressure differential between the ends of the injector so that you get the same result each time they open. Running a fixed pressure at the feed end is not making it constant, its quite the opposite.

I have a similar question. Will the stock regulator on ecotec maintain correct reference pressure under boost as well? and if yes to what limit?

yes the stock regs rise 1:1 with boost im currently running 18psi of boost on stock reg.the only time they need changed is if they cant return enough fuel to maintain base fuel pressure with big pumps

cool, was wondering why none of the turbo and SC kits state upgrading the reg. that answers that question.

So a stock reg will handle walbro 255L/h?

yeah should be fine