330cc Injectors
- Thread starter Seanmcn
- Start date
turbospool@1krpm
Member +
Adding bigger injectors to a setup with no fuel controlling equipment will run your engine more rich, how rich depends on how big injectors you use. 330's as you mention are slightly bigger than stock (which I think are 295 cc or something very close), will run your system slightly richer. I dont think you'd run dangerously rich by adding 330's but Id definitley have the fuelling checked and sorted when doing such mods. And ofcourse an AFR controller would work with bigger injectors, thats what they're there for mate....
goldenvtr
Member +
explain your setup 1st mate, with bigger injectors you need a fuel computer to make the most of them
whatever % bigger than stock injector you go thats the % of how much more rich you will run accross the rev range. the only case of the injectors canceling them self out with rich and lean is when you use a resistor type FCD. do some searches on the forum for SAFC2 and should help you out.
but basically bigger injecors will need some form of electonic devide to control them
whatever % bigger than stock injector you go thats the % of how much more rich you will run accross the rev range. the only case of the injectors canceling them self out with rich and lean is when you use a resistor type FCD. do some searches on the forum for SAFC2 and should help you out.
but basically bigger injecors will need some form of electonic devide to control them
Yes and no.
Blitz will advance the ignition/timing by X amount and adjust the fuelling by Y amount. This is a set parameter and cannot be changed(unless you sent it off to get redone(i beleive anyway)), so potenitally you could still be running to rich/lean.
However, an emanage would be individually mapped to yoru car/mods - therefore, fuelling correctly all through the rev range and timing advanced accordingly - due to this the emanagae should give you slightly better performance.
mudi
Member +
HELLO GUYS ,so now this is my plan for X-MAs,,,,and now iv been told that the 330cc injectors wont work with stndrd ECu..what do i do.because i cant get my hands on a dyno..its bout 500miles from me and the road is really bad (car cant go there)....
- TD04L manifold with/ external wastegate, downpipe, oil/water lines
- 38mm external wastegate
- Uprated 255lph fuel pump
- 330cc injectors
- Sard/Aeromotive fuel pressure regulator, fuel rail fitting and fuel lines
- HKS FCD
- Front mount intercooler
- NGK spark plugs
- Sort of boost control
-AFR guage and bits
- TD04L manifold with/ external wastegate, downpipe, oil/water lines
- 38mm external wastegate
- Uprated 255lph fuel pump
- 330cc injectors
- Sard/Aeromotive fuel pressure regulator, fuel rail fitting and fuel lines
- HKS FCD
- Front mount intercooler
- NGK spark plugs
- Sort of boost control
-AFR guage and bits
MARK@CMBAUTOS
Trader
starlets have efi (electronic fuel injection) this means the ecu controls how much fuel it gets !!!! it dont matter how much fuel pressure u give them or what injectors u run the injectors wont squirt any more fuel uless u adjust the injector duty to suit on the ecu side !!!!!!!!!!
so unless u adjust the duty cycle on the ecu to suit bigger injectors ur wasting ur time and money buying them
a blitz accsess ecu has a small amount of self learn (the same amount as a std ecu dose !!!!) all a blitz ecu is is a std one with a piggy back chip the only way it will control 330cc injectors is if it was mapped to run them form the start !!!
so 330cc injectors dont work without mapping
and giving them more fuel pressure wont make any difference either cause the ecu decides how much fuel it gets period !!!!
so unless u adjust the duty cycle on the ecu to suit bigger injectors ur wasting ur time and money buying them
a blitz accsess ecu has a small amount of self learn (the same amount as a std ecu dose !!!!) all a blitz ecu is is a std one with a piggy back chip the only way it will control 330cc injectors is if it was mapped to run them form the start !!!
so 330cc injectors dont work without mapping
and giving them more fuel pressure wont make any difference either cause the ecu decides how much fuel it gets period !!!!
Last edited:
Texx
Super Moderator
The stock ECU has no idea how much fuel is being injected, it only controls the ON time of the fuel injectors. Injector flow rate dictates the volume of fuel going into the engine, fuel pressure has an affect on injector flow rate.
A simple example would be comparing a 200cc/min@3BAR injector with a 400cc/min@3BAR injector, using a theoretical fuel pressure of 3BAR and a pulse width of 5Ms (without taking into account lag time).
The 200cc injector would flow approx 0.017cc of fuel whilst the 400cc injector would flow 0.033cc of fuel without any alteration to fuel pressure, injector pulse width or duty.
The stock ECU has a learned FT capability of 20% and a short FT of further 10% using feedback from the 02 sensor before it will start to shit itself and throw a code, so using larger injectors with a stock ECU and no additional fuel control will not see the full potential of said larger injectors.
There's no doubt that some tuning is required when installing larger fuel injectors so a programable EMS is the best solution, however just by simply installing larger injectors you will increase the volume of fuel that the engine receives.
MarcoGTTurbo
Member +
Correct! Petrol needs a correct amount of air to ignite effectively, so injecting more petrol without correcting the air is abit of a waste really
Unless u like the smell of petrol in the cab and black smoke out the back LOL!