Max wkw on 650cc injectors

[marc]

Has anyone on here pushed 650cc injectors to the limit on a decent subaru or inline 4cly setup? Just curious as to real world how much power at the wheels they will support. I can take an educated guess as can many others on here but just keen to see if anyone has done it for real life facts . Thanks all

[Stoffa]

my mates 550 pinks got to 238kw if that helps

[funkytown]

my 550s did 235kw and my current 800's just within range @ 300wkw.

so id pick about 250-60 depending on the pressure behind them

[marc]

Thanks guys, yeah about what I had in mind. The rest of the fuel system is very good so can always try and bump up the pressure a little. I managed 230 out of my pinks and have some 650cc's here so just trying to decide to put them in or not. Wanting around 260 -270wkw range. I agree 270 will be the far upper of the limit and prob require 50 ish psi of base fuel press. Just hope that doesnt make the rest of the map a prick to tune..

[DacerX]

all pie in the sky without knowing supporting mods

[Koom]

 dacerx said:

all pie in the sky without knowing supporting mods

Not really when just discussing how far a certain sized injector can be pushed to its limit on a particular type of engine.

[Stoffa]

what about a ecu, that would make a difference to how much power you could squeeze out of them. you'd make less on a possumlink compared to a g4

[funkytown]

there is an equation for fuel usage and flow rates relwted to expected power output somewhere. you put the injectors flow ratings into that equation and you reach a theoretical ceiling at a given pressure it can acheive. its theoretical and only practical once you have ALL supporting mods.

kooms got it correct

[Koom]

 Stoffa said:

what about a ecu, that would make a difference to how much power you could squeeze out of them. you'd make less on a possumlink compared to a g4

Same afr's and timing on both, you'd essentially make the same power. Just more likely to have things go wrong if living near the edge of death if on a Possumlink where the G4 has more safety features. But if you have a setup that can push 650cc injectors to their limits, then a Possumlink should already be ruled out of the equation.

[marc]

 Koom']

[quote name='dacerx said:

all pie in the sky without knowing supporting mods

/quote]

Not really when just discussing how far a certain sized injector can be pushed to its limit on a particular type of engine.

You got it Koom.

And yeah its close to what I would like so im just going to give it a go next month I think. Car is using ECUTEK.

Cheers Funky, thoes online flow rate calculators etc have never worked for me in the past lol (always seem to suggest overkill really haha)

[Pappu1]

235kw on pong 565 buit they were maxed on the top end, afr 10.9-11.2

have seen 270 on 650 on a mates car with G4 link but that was on max side of things

yo marc if u planning to do that on ur GD , best to run no afm as the afm sees almost max voltage by then so wont get much more

[MercuryFree]

http://wikibaru.com/wiki/Guide:Injector_Sizing

[Stoffa]

 SP00N said:

235kw on pong 565 buit they were maxed on the top end, afr 10.9-11.2

have seen 270 on 650 on a mates car with G4 link but that was on max side of things

yo marc if u planning to do that on ur GD , best to run no afm as the afm sees almost max voltage by then so wont get much more

a bigger maf tube would sort that out wouldn't it? Or can they just rescale the voltage?

[Pappu1]

 Stoffa']

[quote name='SP00N said:

235kw on pong 565 buit they were maxed on the top end, afr 10.9-11.2

have seen 270 on 650 on a mates car with G4 link but that was on max side of things

yo marc if u planning to do that on ur GD , best to run no afm as the afm sees almost max voltage by then so wont get much more

/quote]

a bigger maf tube would sort that out wouldn't it? Or can they just rescale the voltage?

yes correct a bigger maf unit will allow rescale

[marc]

correct has 3.25" AFM pipe . Thanks for your input spoon hopfuly ill get close lol

[X]

yeah the bigger the better... my one was restricted to get more power with 650cc cause my MAF pipe was too small

[marc]

 X said:

yeah the bigger the better... my one was restricted to get more power with 650cc cause my MAF pipe was too small

std size maf pipe? and what power lol?

[X]

cant remember? its about 63mm?

[Guest]

i got 240kw on 650cc sard. td05 20g on 28psi with zx airflow meter

[boon]

28psi and all you got was 240kw @___@

[Stoffa]

chinese 20G perhaps?

I'm running 242kw@20psi off a MSE vf with an 18g

[Guest]

 boon said:

28psi and all you got was 240kw @___@

yeah it was a chinese turbo.

[marc]

Sweet thanks guys