Hi All

I want to make some upgrades to my XU10J4R engine to get better performance with some parts from XU10J4RS, and here are my thoughts:

Things to keep:

1- ECU and wiring.
2- Exhaust manifold.

Things to change:

1- Camshafts swap only to (XU10J4RS) or full engine head.
2- Intake manifold + injection nozzles to (XU10J4RS).

Will I get a better performance? Will I face troubles?

Do I need to install XU10J4RS full engine head instead of mine or only camshafts are enough?

Any thoughts?

Thanks.

The problem is I don't have enough room for exhaust manifold behind the engine + no one is available to make a mapping session for my ecu in my area.

as you mentioned, the cast iron manifold will restrict + ecu mapping session is required.

But!..... if I only swap the whole head + intake manifold. will I get some extra hp than the stock XU10J4R?.

Thanks for the info.

OK, I understand.

So, as long as I can't get my Bosch mapped! is it possible to swap ecu to Magnetti Marelli RS? Will the R wiring fit? or do I have to change to RS wiring?

Thanks Man.