Im looking for a set of injectors for my stock Z06. is a 36lb injector correct? this is my first vette so i really am a serious noob and could use some good a advice. Is this an item that can be upgraded for better performance on a stock motor. i have a corsa extreme exhaust (not installed yet) and will also go with an after market air cleaner setup. im not sure if that would have an impact on what type of injector i should be looking at.
thx for the help!
Stock injectors are around 28 lbs.
ONLY focing the injector to flow with a 100% duty cycle (static) can they only handle 448 flywheel HP.
Standard rule to prevent injectors going static is not to run them beyond 80 percent duty cycle which then means the maximum flywheel HP drops to only 356.
Consider also we now are forced to use E10 gas which requires more fuel to make the same HP as normal gas you can see a stock injector for best performance is nowhere the claims of 400-450 rearwheel HP.
Something to consider is weather and where car is to sealevel, the higher the elevation the less fuel is needed but also there is HP loss as much as 50 flywheel HP at 4,000 feet elevation lost
Standard for rating injectors is when fuel rail pressure is about 42 PSI so if you find a third party injector rated at 30 lbs/hr that would be at the 42 PSI where our Corvettes have 58 PSI fuel rail pressure making those 30 lb/hr more like 36 lbs.
Even if engine is stock by using a bit larger injector reduces their pulse width on time which allows the PCM to have better control of injectors and more fuel flow can be commanded to prevent engine knock that pulls timing which kills torque so it is a positive using a 36 lb injector.
Those claiming 28 lb can handle 400 RWHP need to think why the LS2 also at 400 FWHP has 32 lb,
the 500 HP C6 uses 40 lb and
new ZR1 at 640 HP uses 48 lb injectors plus a dual stage fuel pump system
so nowhere can 28 lb/hr handle 460 FWHP, produce maximum performance and worse in hot weather and racing.
36 lbs would be best case as going too large would cause to small and too often PCM commands to injector on time which is less control and injectors internals working harder. With tuning and 36 lb/hr would allow engine knock being greatly reduced while adding timing to increase torque