Bluetop Engine Rebuild multiple question Goal 150-160hp

[Hanzo]

Hello,

i recently bought a 83 Levin with Bluetop Engine (4AGE) which i want to rebuild. My goal is to get around 150hp. And maybe ITBs in the future (mostly for the sound:loveit
As i learned from my previous mistakes it's better to research first before buying anything.

I found out that there are at least 2 Bluetop Bigport versions with different pistons/compressions. Newer modells also have a smallport engine without TVIS.

9.4 : 1
10,3:1 (newer models)
10,0:1 (european modell)

Because i have an EURO Modell my engine has most likely a 10:1 compression. And Toyota can't deliver these pistons anymore.

There also different crankshafts and connection rods. The Bluetop has 40mm crankshaft and18mm connection rods.

I also found 2 really good youtube channels with a lot of 4-AGE Content.
driving 4 answers
Garage 4AGE


My questions are
1. Are the above stats correct?
2. It seems that i can reach my power goals with the bluetop engine.
Or it wise to change to smallport?
3. I also want to change oil pump, water pump etc. I read that the 20V oilpump fits on any 4 AGE. Did anybody installed a 20V oil pump?
4. I also read on the garage 4AGE channel that there are different bigport head versions. Is that true?
5. Can anyone recommend a piston sets?
6. What is the max compression for a standard ECU? I read that 10,7-10,8:1 is possible with the standard ECU.
7. Do i need aftermarket ECU for ITBs?

Thank you all in Advance.