Which Injectors to use, Stock LS6 w/ FAST 90/90
01-04-2008, 09:44 PM
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Which Injectors to use, Stock LS6 w/ FAST 90/90 Should i use the stock injector or should i upgrade to something else? I have full exhaust, so i'll have full intake when i'm done with this upgrade. I do plan a heads/cam in the future, so i want to keep that in mind, but it wont be a huge cam (.610 or smaller lift / .230's duration)
01-04-2008, 09:56 PM
#2
If you're going H/C, upgrade now for sure. I have the SVO 30 lbers and they work great in my application. They act like 36 lbers for LS1s. If you ever think you are going to spray, go 42 lbs at least. One catch is that if you upgrade your injectors now while doing an intake swap, you WILL have to get it tuned to run properly. You can still rock the stock injectors for now, but will have to change them out with the H/C swap. Which since your intake will be off anyways.... I would say rock the stockers till the H/C cames along. 
01-04-2008, 09:59 PM
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hmm... i didn't think about that. guess i'll stick with the stockers for now and keep my eyes open for some 42's 
how efficient are the stockers with H/C?
how efficient are the stockers with H/C?
01-04-2008, 10:06 PM
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Should i use the stock injector or should i upgrade to something else? I have full exhaust, so i'll have full intake when i'm done with this upgrade. I do plan a heads/cam in the future, so i want to keep that in mind, but it wont be a huge cam (.610 or smaller lift / .230's duration)
01-05-2008, 12:29 AM
#5
Stock 28lb injectors will support 450rwhp N/A while at ~13.2 AFR at around ~6200 rpms, this is with a duty cycle of 98% (yes, I have tested this on several cars 
). Obviously with boost or nitrous, while requiring a richer mixture, they will support even less. If you run then at 100% duty cycle they will fail quickly, you should target a duty cycle of around 75%-85%. I would swap in some SVO 30lb'ers at least, you can find them for around $150 and they can handle up to 550rwhp on an N/A setup. 42lber's can support around 650-700 N/A rwhp, again depending on fuel requirements.
). Obviously with boost or nitrous, while requiring a richer mixture, they will support even less. If you run then at 100% duty cycle they will fail quickly, you should target a duty cycle of around 75%-85%. I would swap in some SVO 30lb'ers at least, you can find them for around $150 and they can handle up to 550rwhp on an N/A setup. 42lber's can support around 650-700 N/A rwhp, again depending on fuel requirements. 