RS2 injectors

[Martynf]

Can anyone advise me what the max flowrate of the RS2 green injector is please?

TIA
Martyn

[S2central.net]

Uhhh 600 or 800 - can't remember - Mihnea will know. Where's me fuppin almanac ?


Paul

[audiman]

In a technical phrase they flow about sh1tloads per minute. Car does about 10 mpg if using the boost. But could be worse, i could just drill a small hole in the tank and let it flow out.

I get about 180 miles per tank if I drive it spiritively (?)

[Martynf]

Thanks guys!

Mihnea, can you confirm please?

Martyn

[Mihnea]

RS2 injectors flow 368cc/min at 3 Bar nominal fuel pressure with no boost/vacuum applied.
Any increase in fuel pressure makes a flow increase equal to the square root of the fuel pressure increase.

[tacq]

Flow

Its always interesting to see how the numbers vary for injectorflow .... Some information I got for the RS2 injectors is 444cc/min @ 4bar, which would result in getting some 355hp out of them (afr @ 11.1 and 85% dutycycle). That information is not confirmed thou.
I do have confirmed information of 0 280 150 984 : 270g/min @3bar which corresponds very well to Mihnea's value.

Just to clearify : NewFlow = OldFLow*sqrt(NewPressure/OldPressure)

[S2central.net]

@Tom - just remembered that you need a fuel chip tweak young man !

**** - you shoulda reminded me at the weekend. D'Oh....

Gimme a shout back and we'll sort something.

Paul

[Mihnea]

Re: Flow

@Tacq: absolutely, 270g/min @ 3Bar is what I knew as well for the RS2 injectors.

Regarding the AFR, what do you think 11:1 AFR is good for??? So far I've tried 11:1 AFR in a few cars and apart from huge black smoke, I couldn't get anything else, total loss of power and so on. IMHO, AFR should be anywhere from 12.7 to 13.5 provided the EGTs after the turbine never get over 840 degree C and this will be the best HP. Some people tend to think the lower the AFR (thus the richer the mixture), the higher the HP, no way it is like this, when an engine is blowing huge black clouds, it is surely losing loads of HP...

Originally posted by tacq
Its always interesting to see how the numbers vary for injectorflow .... Some information I got for the RS2 injectors is 444cc/min @ 4bar, which would result in getting some 355hp out of them (afr @ 11.1 and 85% dutycycle). That information is not confirmed thou.
I do have confirmed information of 0 280 150 984 : 270g/min @3bar which corresponds very well to Mihnea's value.

Just to clearify : NewFlow = OldFLow*sqrt(NewPressure/OldPressure)

[tacq]

afr

Ofcource ideal afr is to keep it around 12.7 in case of getting maximum power but temperature would be of greater concern. I took the 11.1 of afr as an example to show a minimum capacity of those injectors, it was not intended as a recommendation of afr.
With afr 12.7 they are capable of 407hp and afr 14.7 471hp.

I never logged data this summer in the Ur-Q, but I did have the afrmeeter hooked up for a short while and then I noticed afr' of low 11's. This resulted in approx. 950°C exhaust temperature measured in the turbine itself. This is a mapping that has a tag on it saying Portugal 1986....