Small port engine

[totta Crolla]

So I have a smallport head, bottom end, inlet manifold injectors, fuel rail, tps and ecu.
I know that I need to modify the plenum but can anyone please tell me what else I will need to make it run as a smallport.
I think it will be distributor and injector clips. can I however use the bigport injectors ?

[Ivan141]

I'm guessing you might need a resistor pack, but I'm not sure.
Do a search for hi-z or lo-z injectors.
You might also need to swap pulleys over since the FWD waterpump is different to the RWD one. The RWD waterpump has a longer nose because of the bigger bearing they put in there to support the engine fan.
If you stick to a fwd pump then you need the fwd pulley, but I would advise against using the belt driven fan in that case.

[jondee86]

If you have the original bigport RWD, just strip everything you need
from the bigport and swap it onto the smallport. If you get an inlet
adapter plate, you can use the bigport manifold, injectors, harness and
ECU. Easy peasy, but you don't get the torque benefit from the smallport
inlet manifold design.

If you cut-n-shut the smallport manifold, you should use the smallport
injectors and ECU. Means a lot of rewiring, and you would need a FWD
smallport engine harness to butcher for the plugs. Smallport JDM injectors
are high impedence, so no resistors required.

Cheers... jondee86

[hachirokuGTV]

jondee86 Wrote:If you cut-n-shut the smallport manifold, you should use the smallport
injectors and ECU. Means a lot of rewiring, and you would need a FWD
smallport engine harness to butcher for the plugs. Smallport JDM injectors
are high impedence, so no resistors required.

Cheers... jondee86

+1. This is the best way.