Dear All,


This is my first post

I want to ask you for some advice.

First I need to write what info I have and what is the goal.

Goal: C30 T5 2010 with B5254T7 engine upgraded to ~350 PS + AWD swap from V50 T5 AWD.

Why?: My engine is broken - compression check results are 8/7/9/7/6,5 and after "oil test" they are rising which means that block needs to be rebuilt.



Findings:

1. Internal parts are not enough for ~350PS (rods, pistons)

2. Sleeves are to thin and need to be enhanced if I want to have a higher power output

3. There are some problems with engine cooling at such power - oil temp and coolant temps (??)

4. Stock turbo need to be replaced.


I have also info about C30 Polestar configuration (455@7500 / 530 Nm ):

- standard 2.5T engine block

- D5 diesel IC (same like in XC60 T6 engine) - I already did this upgrade

- K26 Turbo (boost 23PSI) - in some other tech data K16 is mention

- S60R pistons, rods and exhaust camshaft

- intake camshaft from N/A 2.4

- valve springs from Volvo 3.2 N/A engine

- Bosch 550 injectors

- Volvo 850 flywheel and Sachs Performance clutch



Now - some answers that I think are valid (if not please correct me):

1. I can use S60R or RS rods and pistons - also there is an option to change crankshaft for 2.4 N/A engine to decrease compression ratio (or this one from S60R can be used to?) - the whole lower part of the S60R engine I already have


2. Darton is really expensive and in my opinion, it is too much for this power output. I need a cheaper but "good enough" solution that can manage ~350HP (there is no plans at all to go over this power).

Option "A" - I can close my engine here: Engine upgrade (Satistech Poland)

Option "B" - I can buy B5244S5/B5244S5 2.4 N/A block engine and close it too

Option "C" - any other proposed by you?


3. I know that some RS owners are adding additional oil cooler. It is needed for this power? There are any performance parts that I can use (or need to use) to help the engine cool down?


4. Turbo - what I know for now that best it will be to get RS turbo and Bosch 550 injectors. There is any other option that will fit somehow P&P? I know that DP needs to be replaced (I'm doing AWD swap so DP needs to be adjusted).


Any help or advice are really appreciated