Many thanks for the comments and SUGGESTIONS !
I will try to answer all questions.
About TURBO POSITION
We have prioritized the turbine support to guarantee that it remain on the original position (under extreme hot conditions), so, turbine support is fixed on gearbox support and this is the first reason because the Turbine is there
Please see this photos about turbine support:
About Oil filler cup
.... we have plans to remove it from there and we will use the oil chanel to send oil at Turbine inlet.
We've had some problems with Turbo configuration because we've designed the exhaust manifold for a divided Turbine T3, so, put a single wastegate (tial) here is not an easy work , because we will need to have "signal" (for wastegate) from both exhaust manifold (front cilinders and rear cilinders). So the options are:
a. Use a Internal Wastegate Turbo, like T3/T40E or T3/60-1 - Garret Ball Bearings are very interesting (like GT2876R) but also very expensive
b. Use a unique wastegate configuration and design a wastegate conduct for Divided T3
c. Use a Dual wastegate configuration
Currently I'm researching if, an Internal Wastegate will work on this kind of Engines (3L 24v), to avoid the non desired "boost creep". I have found some turbo kits for Nissan V6 3.5L with internal wastegate and also I have found this special internal wastegate, that could help me to optimize the exhaust flow on internal wastegate:
Ultimate Internal wastegate valve for T3 5Bolt, high flow 3" V-band Style: atpturbo.com
Fortunatelly I have a shared small turbine (T3 - Hot AR=.80 and COLD AR=50) ,as you see in the pictures, and I will be doing the first start and Megasquirt configuration with this turbine so I will have some indicators of Turbo LAg and Inmediate response. With this small turbine I expect to start spool at 2600-2900 RPM. After some months of test I will have enough information to chose the rigth turbo (of course it will be a T3 turbine and T4 compressor)
The dessired pressure is 8-9 PSI on normal conditions and 12PSI on boost
CR Compression 9:1
I have had other cars with 8:1 CR Compression and the engine move very slow between 1000-3000RPMs (until turbo start to work) so, for this engine, I would like to set 9:1, and I feel that 9:1 ratio compressor on a 24V engine (I mean good VE eficiency) and using a GOOD intercooler or Watercooler will allow me to use 16-18PSIs (of course using premium fuel) and this is more than I'm looking.
Thank you so much for your comments and any ideas and more comments will be welcome, I will try to put all compressor maps researched and information derived from it to chose the best compressor MAP...