I will make this very simple!
If your 20Vs are running in these bodies before transplanting:
- Corolla SE.G EE100 1.3 Carbs
- Corolla SE EE90 1.3 Carbs
- Corolla LE AE82 Carbs
* Or any other body running carbs and below 1.6
PLEASE ENSURE THAT THE FUEL LINE/PIPE RUNNING FROM THE TANK TO THE FUEL RAIL IS NO LESS THAN 8mm in size!
I have checked a few 20Vs which are previously running 1.3 carbs and most of them are still using the 7mm fuel pipe which will cause the Fuel System to run HIGH PRESSURE PERMANENTLY! (10PSI Higher Than Normal). 20Vs with this setup will not be able to run the optimal 30-32PSI Idle Pressure, instead it will run within the region of 38-45PSI which is waaay too high for 20V NA. This will surely cost more fuel being burnt needlessly.
I am not telling this for my business benefit whatsoever, just helping fellow 20V owners.
* And yes, if your car have smaller diameter fuel pipe it will induce higher pressure but the actual volume might not be suitable at all.
So please check with your respective mechanics that done transplant for your 20Vs is they have upgraded the Fuel Pipe too.