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Old 10-09-2018, 11:45 PM   #1
Theredbeast
 
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Comp injectors vs regular

Been looking at bigger injectors for my setup. I see some companies offer “comp” injectors extrude honed with pintle work blah blah. My question is... why would I buy for example a 5x18 comp injector when I could just buy a 5x20 for cheaper? Motor is a 97 maxed 180 pump. Currently running a 5x14 extrude Hines nozzle @78lpm. Opinions please
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1997 f250 dana60 swapped xclb. 1996 12valve swapped. 4k gov 024DVs timed 22* with extruded 5x14 78lpm sticks. Hamilton 188/220 cam. 63/68/.8 gated over s478. ATS stage 5 e4od
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Old 10-10-2018, 12:33 AM   #2
Big Blue24
 
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I can't speak for what other companies do for their "comp" injectors. But I do know that around the 5x018" size, we start to see gains from edge filter removal. Also, when it comes to needle work, typically we see small to zero gains on smokey/air limited setups, whereas engine combinations that have excess airflow meaning they clean up all the smoke, adding needle work can result in substantial 50+ HP performance gains. When a customer calls in looking for 800+ HP on a 12v, and they plan to street drive it, we normally are going a little larger on the injector setup say 5x022 with edge filter removal but no added needlework whereas for a race truck, a heavily modified 5x018 can usually deliver enough fuel. A 5x022 on a healthy injection pump will normally run fairly clean when the injection event is kept short whereas a heavily modified 5x018 will have nasty idle haze, midrange smoke, and clean up a little on the top end.
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Old 10-18-2018, 03:00 AM   #3
Theredbeast
 
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I mostly street drive the truck. But I also want to go to the track and run it. So are you saying a 5x18comp and 5x22 will both make around the same power? But one is more streetable than the other? What’s better for the setup I have in my sig?
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1997 f250 dana60 swapped xclb. 1996 12valve swapped. 4k gov 024DVs timed 22* with extruded 5x14 78lpm sticks. Hamilton 188/220 cam. 63/68/.8 gated over s478. ATS stage 5 e4od
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