I have searched the forums and googled it, but I can't find the answer.

I even tried looking up replacement stock injectors. Alot of auto parts have them, but no one list the size of the injectors.

 

There has been a discussion about this and all I can say is That the Replacement injectors for the Stage 1 TN are 380s and the stage 2 are 510s so obviously they are less than 380 CCs

 

people have said they are 280 cc units, but I want to make sure.

 

I have heard 330.

 

they are 290cc

 

The man with the answer!

 

thank you

 

The software on the ECU says they are 285.92cc, but I'm sure 4.08cc is nothing to worry about .
-Jared.

 

290cc @ 3.0 BAR VQ30DE-K application

335cc @ 3.5 BAR 350Z application

 

uh oh ....here we go again.

Where can we get an official answer?

 

that is essentially saying the same thing QuadCam - as you increase fuel pressure, fuel flow (in cc's) increases.

So, at 43.5 psi of pressure, which is the industry standard for rating a fuel injector, they are 290cc, and why I answered as such. The Z, running a returnless fuel system, runs a bit more than that for fuel pressure, and as such, the injectors flow a bit more at the pressure the Z runs. But, they are still 290 cc injectors in actuality (they are just "behaving" like larger ones)

 

Burn

 

I just gained some confidence in a sponsor. Z1 FTW.

 

Are the G35 Sedan Running same injector size?

I need to know what is my 2005 G35x injecor size.

 

it should be the same.

 

One must know the exact density/temperature of the fuel used thru the injector to determine the exact flow rate.

Ethanol is 785 @ 20C whereas gasoline varies around 737 [0.73 grams per cc at 15C.]. Toluene is 862, IsoOctane is 692, O-Xylene is 880. Kg/CM
Density varies about 1.3-1.5 points per 1C change with single components. Why the fuel tank now has a temperature sensor with returnless regulation.

http://www.vpracingfuels.com/vp_01_fuels.html

 

Why? I don't understand what not having a return system has to do with the fuel flow rate varying based on temperature.

 

You're way beyond the scope of the question though

The injector can only flow a finite amount of fuel per minute, regardless of temperature, or the octane of the fuel being passed through the injector.

Compare the part #s of the G injector to the Z at the dealer - I'm imagine they are the same, but cannot be 100% sure

 

The injector can only flow a finite amount of fuel per minute, regardless of temperature, or the octane of the fuel being passed through the injector
Consider E85 vs 10% E vs 100% conventional all are liquid fuels.

You are mistaken, study the density of a liquid flowing thru an orifice.....the friction varies with density, which varies with temperature.

The injector is speced for a liquid of an exact density.............in pounds per hour.

Many people confuse weight and volume............the MAF measures air weight as does ecu so volume [cc] must be converted into weight [grams per second or lbs per hour] to accomplish the AF calculation.


The nominal 10.9 factor used to convert pounds per hour into cc per minute is a made up number that happens to work for one particular density!

A cc is a metric volume standard whereas a pound is a function of local gravity.........where you are on the Earth.

http://www.cbu.edu/~bbbeard/313/Day_04.pdf

Page 4 of above has density graphs for 3 types of gasoline and how the density varies over 30F to 150F

 

again, you are far beyond the scope of the original question