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Stock injectors? wtf?

Old 05-25-2004, 03:39 PM
  #1  
1.5 BAR
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Default Stock injectors? wtf?

okay I went here: http://www.robietherobot.com/storm/f...ectorguide.htm
and found that 240cc(stock) honda injectors are capable of supporting 192hp max. If that's the case and I'm only boosting 8psi (soon with TE), why would I want to get bigger injectors? I mean don't most tuned setups running 8psi usually put down around 160 hp?

I'm getting bigger injectors anyway, just wondering wtf...
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Old 05-25-2004, 03:42 PM
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Default Re:Stock injectors? wtf?

nm, I found the answer myself... realworld injectors max out at around 80% duty cyle= 154hp. heh
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Old 05-26-2004, 10:25 AM
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Default Re:Stock injectors? wtf?

That still doesn't add up right. Can anybody elaborate on this. I'm kinda curious. Would this have anything to do with the fact that honda engines generally rev higher than most engines and that leaves less time for injector pulse causing injectors to max out quicker?
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Old 05-26-2004, 10:43 AM
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Default Re:Stock injectors? wtf?

no
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Old 05-26-2004, 10:51 AM
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Default Re:Stock injectors? wtf?

Originally Posted by hoggy
...honda engines generally rev higher than most engines and that leaves less time for injector pulse causing injectors to max out quicker?
True.

Duty cycle is the percent of how long the injector is open vs how much time there is available for it to be open.

Duty Cycle is based on RPM, not injector size.

Why "240cc give out before 450cc" is because of the pulse duration comparison at a specific RPM/MAP voltage on the fuel table that flows the amount of fuel you want.
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Old 05-28-2004, 12:13 PM
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Default Re:Stock injectors? wtf?

Originally Posted by Doofnoil
nm, I found the answer myself... realworld injectors max out at around 80% duty cyle= 154hp. heh
but 240s on a gsr make more than that, i dont get it.
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Old 05-30-2004, 03:34 PM
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Default Re:Stock injectors? wtf?

Originally Posted by sohcrxsi
but 240s on a gsr make more than that, i dont get it.
it really depends on the engine's BSFC - brake specific fuel consumption. it's a measure of how efficient an engine is at converting fuel into mechanical energy. consider - what if you dropped the compression on that GSR to 5:1 or something stupid-low like that? it would still have the same displacement, and so would use the same amount of fuel, but the power output would be next to nothing.
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