s2000 fuel injectors?

[hondapartsman]

does anyone know what the cc's to s2k injectors are? how about if they are saturated or not? anything helps......
thanks

[flylwsi]

have you called RC Engineering?
i'm sure they've got that info...

[DB8]

saturated 360cc

[slow dx civic]

please excuse my stupidity but wtf is the difference between saturated and unsaturated. thanks

[mls]

I think saturated means that the injector is working at its maximum limit, & that is the most it can flow. I think it is the same as reaching maximum injector duty/cycle. Not 100% sure though.

[slow dx civic]

cool. any body know this for sure i did the search and didn't find anything.

[DB8]

Injectors come in Saturated and Peak and Hold types. The main difference is the impedence. It has nothing to do with duty cycle. If you are pushing 100% of your injectors then they are probably not going to last long. The most you want is 80% duty cycle, then you better upgrade. A lot of people ask when its necessary to upgrade your injectors? The answer is when you surpase the 80% duty cycle of your current injectors. Stock tegs and civics use 240cc.

Here is a good link for a good tech read on the difference of the two types of injectors. From there you also have choices of pintle, ball, or a disk type. Stock cars normally comes with a pintle type. RC uses a lucus disk.

[slow dx civic]

great post thanks a lot man.

[DB8]

Here is anther good find. Go down the thread a little bit and you will see some pretty detailed info on injectors.

[v4lu3s]

stolen from http://www.msdignition.com/fuel_3.htm

Saturated Circuit Drivers/Injectors
Most domestic OE production EFI systems use an ECU with 12 volt Saturated Circuit drivers. These are very inexpensive, simple, and reliable. This type of driver works by supplying 12 volts to the injectors and the ECU turns it on and off to establish a fuel injector pulse. In general, if an injector has a high resistance specification (12-16 ohms) the ECU uses a 12 volt saturated circuit driver to control it. This means that the current flow in the driver and injector circuit stays low keeping the components nice and cool for long life.
Conversely, a downfall of a Saturated Circuit driver is that it has a slower response time (and closing time) than a peak and hold type. This slower time can somewhat decrease the usable operating range of the injector energized by this driver. An injector operating on a saturated circuit driver typically has a reaction time of 2 milliseconds while a peak and hold driver typically responds in 1.5 ms.


Peak and Hold Driver/Injectors
These type of injectors and drivers may also be called current sensing or current limiting. They are more expensive and complex than saturated circuit drivers, and are not generally used with domestic production ECUs. They are primarily used in aftermarket high performance systems.
Most high flow injectors are low resistance (2-5 ohms) and use a peak and hold driver to activate them. The Peak current is the amount required to quickly jolt the injector open, and then the lower Hold current rating is used to keep it open for as long as the ECU commands. These require the extra kick from the higher current to keep the opening and closing time of the injector stable at the higher fuel flow rate.
With this type of driver, 12 volts is still delivered to the injector, but due to the its low resistance, the current in the driver circuit is high. How high? Using Ohms’s Law we can calculate the current rating (12v/2 ohms = 6 amps). This is substantial current flow and a Saturated Injector cannot handle it.