EricF Posted September 28, 2009 Report Share Posted September 28, 2009 Hello, Not sure if that post was serious or just sarcasm, but here goes . Every calculator that I have found recommends a minimum of .60 for BSFC on a turbocharged engine, with .65 being ideal. It's not an error on the afore-mentioned site, just the facts. I am not arguing that oranges aren't good for anything more than stock, but I do think the answer lies somewhere in the middle. I agree that the calculator shows that stock oranges are not even sufficient for the engine they came with . With a 17 psi tune though, I'd feel very insecure about running orange's if it were me... Joe Hi Joe, I took datalogs of an 850 of mine from the past, running orange injectors. Wideband air/fuel readouts showed a maximum value of ~12.7-12.8:1 with a 19T turbocharger including boost spikes up to 26-27 psi. Same car ran 13.3 in the quarter mile at almost 108 mph trap speed in full daily driver weight with 2/3 a tank of gas and my canoe load bars on the roof. Stock 850 turbo injectors. Put that in the pipe and smoke it I am certain that car saw duty cycles of 100% fairly often. I had an injector freeze open once. Tapped it with a wrench and it fixed itself. Not recommended, but I also had a wideband air/fuel gauge on that car and it *never* ran lean under WOT high boost conditions. Not that I would recommend trying to get that much out of the orange injectors, but I am primarily saying that just because an online calculator says something does not mean it is an absolute truth. 'Reputable' and 'trusted' as they may be... I am sure the creators of these calculators use them to help guide people in putting together new hardware setups. We do not for the most part do that at Volvospeed. We turn up the boost and upgrade our compressor wheels, that's mainly it. Stick with general knowledge unless you are going beyond the realm of general knowledge As an aside, my current 850 has 350cc/min blue injectors, with the base fuel pressure at 52-54 psi. It's around 390-400cc/min effective flow rate. I am currently running very rich air/fuel ratios and would give you $10 if I strapped the car to a dyno tomorrow and didn't make 300 whp (~330-340 bhp). Anyway take that whichever way you'd like, but do know that if you run a larger injector than your tune specifies, you will lose a lot of power and be running very rich across the board. If you still haven't purchased your tune, please make sure that the tuner knows which injectors you will be using. Link to comment Share on other sites More sharing options...
Che'_Moderator Posted September 28, 2009 Report Share Posted September 28, 2009 /em shakes head "How much HP does this injector makes" depends on the engine. 700cc will be good for only about 2hp in a 1 % efficient engine. If you want to go by theoretical limits they are good for about 440 hp on a 99% effecient engine running 13:1 at 100% peak hold. Real world they are good for ~350bhp....... or 280bhp on a ST chip :lol: Link to comment Share on other sites More sharing options...
Iloveboost Posted September 28, 2009 Author Report Share Posted September 28, 2009 Thanks for the responses guys. I went ahead and ordered the whites. Link to comment Share on other sites More sharing options...
Wagoneer855 Posted September 28, 2009 Report Share Posted September 28, 2009 Remember that it's not the same once you start talking about the 2.4 blocks with 9:1CR. My stock reds couldn't keep up at 17psi with a 16T. Link to comment Share on other sites More sharing options...
Cal3thousand Posted September 29, 2009 Report Share Posted September 29, 2009 and the 13t comes with reds... why did they bother making an injector only +5cc more than the orange? I thought REDs were 300cc making them 10cc LESS than orange. Link to comment Share on other sites More sharing options...
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