Compound turbo or Bi-turbo set ups

[RabbitJockey]

compound+spoolvalve u should have no trouble

That's what i think too. The valve is a must though. or else nothing is going to happen.
I also need to increase the fueling somehow. I can't afford a Gilles Pump. (not even close)

maybe not, the first turbo is going to be making more air move through your engine and spooling the second turbo much faster.  a spool valve could make it too fast send ur head flying.

[Rabbit on Roids]

people use these on civics...

Civics flow more air than any VW diesel.

the high pressure wastegate opens and the high pressure turbo effectively freewheels.

Thats not how compounds work, they share the load of compressing the air. If you feed 15psi into the high pressure turbo, the HP turbo will multiply that by whatever ratio its set to produce.
What you're describing is a sequential system where the LP turbo completely takes over. That would require a bypass on the inlet side to equalize pressure on both sides of the small turbo's compressor and a large wastegate to flow the exhaust around the turbine.

neither one of you are completely right...

ok, so when the drive pressure is too much on the high pressure turbo, the wastegate opens, and starts dumping the spare exhaust at the low pressure turbo. (but keeps the HP turbo spinning still) the turbo doesnt freewheel, its still spinning and making boost, the wastegate is just partially open too. its still a compount setup. if it had all the valves like you are talking, then it would be a sequential setup.

[Smokey Eddy]

I'm confident that with the right plumbing and exhaust flow out of the 1.9L head the T3 will still boost the engine just the same as it does RIGHT NOW and that with a proportional spool valve (meaning it would open and close with a lever) I might be able to control the hx35 and the added exhaust restriction of the second exhaust turbine.

the auto CAD drawing is coming very slowly, it's very time consuming to get it right.

If anyone has a CAD drawing of our head or a turbo i'd greatly appreciate a copy

[OM617]

neither one of you are completely right.

Nope. Read it again.