Trevor_reardon
New Member
I'm wondering will 4g93 intake manifold (with throttle body), fuel pump and injectors fit in/on a 4g15 engine??? Thank you
FI of 4g15 1.5 sohc is 180cc / pressure 38.5 psi and FI of 4G93 1.8 sohc is 210 cc / pressure 43.5 psiHi all, i am having a 4g15 1.5 sohc with K&N intake Air filter, racing header and free flow exhaust, Iridium spark plugs and high tension plug wires....i want to install a 4G93 1.8 sohc fuel injector to it for improved performance, suggestion please. My friend told me that a stock 4G15 1.5 sohc with 4G93 injector gives a better performance...so i want to have the expert view on this. thanks
Hi, currently my car is running very lean and only increasing the pressure from 38.5 psi to 43.5 psi (180 cc to 210 cc which is increase of 30 cc). since i have K&N conical Air Intake filter, racing header with FFE and iridium plugs.while yes a free-flowing intake and exhaust will allow the engine to flow better doesn't mean it will require more fuel. I know that with my 1.8l it has about a 20% overhead of injector flow left before they are maxed out (stock standard) so I would imagine that the 1.5l is going to be a similar thing and with how the ECU works it will automatically add fuel (via trims) to suit for that sort of add-ons. If you were to add a different cam then maybe you would need bigger injectors (and a re-tune)
My car is running lean and i have K&N conical Air Intake filter, racing header with FFE and iridium plugs.The stock 4g15 injectors are enough for the 4g15. Adding more fuel from the 4g93 injectors but not more air will make the car perform worse. This isnt a video game where you just add on parts and make lots more hp
My car is running lean and i have K&N conical Air Intake filter, racing header with FFE and iridium plugs.
Hi Bro,How lean is it running? What is the air fuel ratio that it's running at at idle, cruise, and full throttle? The original tune from Mitsubishi (world-wide the tune was the exact same) caused the engine to run very rich under all situations, and this has been verified by multiple dynometer checks. Your engine is still sucking almost the same amount of air with the standard intake or with a K&N intake or with no intake - maybe a 5cc injector variation.
In addition, the engine runs an Oxygen sensor, which automatically add or subtract fuel to meet the fuel map that Mitsubishi did from the factory, which allows for -12% and +12% fueling any given point if you let the car adjust itself for long enough. The 4g93 injectors are 16% larger than the 4g15 injectors, and they cant be used without retuning the car.