Some Fuel Issues

[SimonR32]

Had the car on dyno the other day and my sard 800cc twin spray injectors are getting to 95% duty cycle running 575rwhp

Have a sard rail, sard reg and 044 mounted in tank...

From what I have been told the 044 is probably running outta flow, hense the high injector duty cylce. I have not checked the fuel pressure since we set it with standard fuel pump in but I'm going to assume its still at 3bar.

2 questions!

Would it be worth bumping up the fuel pressure to say 3.5/4bar to get a bit more injector clearance or will this cause issues?

And what thread do i need for the Sard FPR to put a gauge on, is it 1/8 NPT?

Cheers

Simon

[RB30-POWER]

400rwkw is the limit usually found with a single 044 pump.

you could bump the pressure a bit, but remember whatever boost you run that pressure adds to your base fuel pressure. i.e 50psi base and 30psi boost = 80psi fuel pressure.

i would look at twin pumps myself, if your going for more power, or up the pressure a little to see if its possible to lower the duty cycle a bit if you are happy as it is.

[SimonR32]

to tell you the truth im not fussed with making heaps more power, im over it and just want to enjoy it for now but a extra 80hp of fuel would not be a bad thing.

i cant be stuffed going twin pumps etc

[Adriano]

Raising the fuel pressure will make the pump flow less, i would fit the Fuel Pressure Gauge, and see whats going on. PS increasing the fuel pressure will change the tune.

[SimonR32]

i know it will change tune... and im going to add gauge

just need to know what thread i need for sard frp

[shanef]

http://www.mscn.com.au/scripts/prodView.asp?idproduct=390

1/8th" BSP

[SimonR32]

cheers mate