help to find big injectors

[aronmatic2]

i am looking for big injectors. i have to replace my 750rc-s.
my rc-s on 95% now. i looking for 900-1000cc high impedance injectors.
if anybody has any place,where i can find,please let me know.

[Jamo]

Are you serious? On a GT30R your 750RC's are at 95 injector duty?

[prosty]

Why high? Just get a resistance to each injector and go with low, I don't think that it exist much more bigger than 750 cc high imp. I have 788 cc injectors and they work great (with a resistance)

Are you running ethanol or gasoline? if gas then good job in maxing out the injectors

[Bram]

Have you tried 034 motorsport already?

[Jamo]

They only do 60lb in high impedance which is smaller than the ones Arons have now.

[aronmatic2]

Are you serious? On a GT30R your 750RC's are at 95 injector duty?

yes jamo. i am close to the end on 2.1 bar on 6500rpm.
maybe because of too rich mixture, but i like to use injectors on 70% max duty.
other thing, i bought a gt35/40r

Why high? Just get a resistance to each injector and go with low, I don't think that it exist much more bigger than 750 cc high imp. I have 788 cc injectors and they work great (with a resistance)

Are you running ethanol or gasoline? if gas then good job in maxing out the injectors

i have standalone system, i just have to switch, but i heard many bad things about big, low impedance injectors.
this is the only reason.
i am running with omv super100 gasoline.

[aronmatic2]

i just thinking more.
i can open the injectors to 100%, if my fuelpump cant deliver more.
i have 044 bosch motorsport.
Where is the end of this pump?

[BRY]

You need a set of B280705282/2 v2766 injectors
They are Bosch motorsport injectors and flow 990ccs

[Jamo]

i just thinking more.
i can open the injectors to 100%, if my fuelpump cant deliver more.
i have 044 bosch motorsport.
Where is the end of this pump?

Trust me that pump will cope with your demands!

According to MRC injectors dont like perform very well above 85% duty cycle.

LMAO @ you buying a GT35/40, I knew it would happen when you went for a stroker setup!

[S2central.net]

Trust me that pump will cope with your demands!

According to MRC injectors dont like perform very well above 85% duty cycle.

LMAO @ you buying a GT35/40, I knew it would happen when you went for a stroker setup!

Agreed on duty cycle with jamo... That Bosch pump (0580 254 044) can flow 200 liters per hour. Spec sheet attached. Note how capability reduces with lower voltage at the pump and this one is spec'd at 13.5V !

Paul

[S2central.net]

Doing a little quick math... A 550cc/min injector has a theoretical limit of 33 liters per hour (l/h). For our 5-pot engines thats a flow requirement of 165 l/h - well within the capability of the Bosch mospo pump.

This site has good general info - http://www.stealth316.com/2-fuelpumpguide.htm

Note how flow capability is reduced with increased fuel pressure. This is worth considering for high boost applications. Say the nominal fuel pressure is 4bar at the FPR. With say 2bar boost at the redline there is a requirement for 6bar of fuel delivery pressure...

But that 200l/h rating is for 5bar delivery pressure. There must be a graph online or from Bosch on this subject... And if the voltage at the pump terminals is lower than 13.5V then flow will be further reduced.

[caterpillar]

http://www.fiveomotorsport.com/get_links.html

[prosty]

044 pump is good for 550-600 hp . I've heard 700 with a NA car. I'm using constant power on my 044 to juice it up a bit extra. I have no problem with the fuel and I'm running it in the tank with approx 550 hp or more.

All big power cars are using low imp injectors, just get a good brand, delphi , bosch or Siemens Deka (NOT THE LONG NARROW ONES!!!) then you're safe. I'm using delphi injectors. My car is tuned without exhaust temp.

[aronmatic2]

thanks guys. i have all answers, what i needed.
i will check the volts at my fuelpump first.