Why Switch to EFI?
So why go to the trouble of converting from Carburettors to Fuel Injection, especially when the car is running just fine?
Well, there are a few things motivating me:
- Lack of choke and poor starting when cold
- Poor fuel economy, not helped by a rich spot at cruise (which if I try and jet out leaves me lean at Wide Open Throttle (WOT)
- Heat soak into fuel bowls (a problem only when shutting off for a few minutes after a long run and then restarting)
- Lack of distributor advance based on load (Mallory with vacuum advance not recommend by my engine builder due to issues with it)
- I understand computers better than carburettors!
Admittedly now that my fan belt is perfectly aligned I no longer have any problems with blocked idle jets so I suspect these were down to rubber particles from the belt...
Anyway, what I hope to get from fuel injection and direct fire ignition are:-
- Easier Starting (I will use an idle valve to give me the effect of an automatic choke)
- Better Fuel Economy (I can set the ECU to give me either maximum power or maximum economy dependant on engine load and RPM)
- No heak soak (Fuel isn't stored in fuel bowls attached to a hot engine)
- Better Performance (I'm not expecting more BHP, but more drivability especially because of DFI and the ability to control ignition advance by engine load as well as RPM)