1.8l to 2.0l Conversion Advice Requested Options

[bob's project]

I have a 1974 1.8l and have access to an affordable 2.0L GA series engine.

I am highly tempted to do a conversion. Due to special rate insurance I have I need to maintain fuel injection on the engine.

Where I need guidance is how difficult is it to convert the car from the 1.8L engine to the 2.0L engine and switch from L-jet to D-jet?

Mechanically I know this will be a piece-o-cake but electrically are there any gotcha's?

Thanks in advance.

Bob

[Valy]

The 2.0L was designed before L-Jet was available so there was no reason to modify it for the end of the production.

You can keep the everything you have now on the 1.8L. Injectors are fine, don't worry about that. If you really want to mes around with tuning you can increase a bit the fuel pressure with an aftermarket regulator and then fine-tune the AFM. Is the same as replacing the injectors but more tuneable and cheaper.
You'll probably find some threads about just tuning the AFM to be a tad richer. That doesn't solve anything above 3000 RPM where the fuel map is fixed to the RPM value. However, it does add some more fuel in the lower range, correcting the lean set-up designed to pass emissions. The point is that the low range enrichment will always help a bit, regardless of the engine size but is not required to fix the bigger engine as the fuel is metered to match the air-flow into the engine, up to 3000RPM.