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i am running 63psi of fuel rail pressure and an average of 12.7:1 AFR...
http://members.iinet.net.au/~joannep...TECdyno001.jpg
will bigger injectors help me to reduce fuel rail pressure? i only have VAFC II to tune with...
i do not know the duty cycle.
BTW - PW can be upto 100ms on a cold start scenario...
is that 63psi with the vacuum hose on or off? Im going to be installing my FPR soon and dont know what pressure will be ideal for RC injectors?
vac off...
go here weezer:
http://www.rceng.com/technical.htm
was that reading taken when the hose is off and on idle? cause by taking off the hose.. the FPR sees atmospheric pressure.. so the spring stiffness will equal the fuel pressure..with the hose on & on idle, you should see a drop in fuel pressure cause this is when there is max. vacuum and the FPR valve is at its max. lift to regulate fuel back. I think on idle more than 70% of the fuel is returned back to the tank.
Quote:
Originally Posted by tinkerbell
is short for 'vacuum hose off'...
hahha.. sorry my bad.. should have read it carefully..
yup well thats the reason why its high .. cause there is nothing assisting the spring to lift up the fpr valve.
i think with the vac hose off, its the reading at WOT since there is no Vaccum at WOT. In the workshop manual it says Fuel Pressure reading should be done with the hose off.
just want to know the different between high restitance fuel injectors and low resitance Fuel injectors?Explaining the benifits and problem with each?
....
it basically has to do with how the injector is told to fireQuote:
Originally Posted by Snoop_gee
one says "open" and then stops saying open when it's time for it to stop, the other basically says "open", and then "close", when it is time for it to stop.
Using a resistance of injector that doesn't match how the car is set up can cause serious problems(frying the ecu very quickly), however, it is possible to wire in resistors to safely use non matching injectors.
saxman yo man thats realli not explaining the difference between high and low resistance fuel injectors... i'm still confused. can some1 serious explain this?
I don't know how else to explain it... the difference between them is how they interpret the signal from the ecu. The biggest notable difference between the two is that with a low impedence injector, there is a slightly shorter triggering time, so on very high out put engines with super large injectors, idling is slightly improved.Quote:
Originally Posted by Snoop_gee