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Old 09-26-2002, 08:39 PM   #1
cpu77
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Default 440cc or 550cc Injectors for ludespeed stage 2 kit

I am patiently awaiting my Ludespeed Stage 2 kit with LINK ECU w/ boost controler (Not sure if that makes it a stage 3?) Anyway I bought a set of fuel rails from Shiv and now I am trying to decide what size injectors to buy? I want to run between 6.6lbs - 10lbs of boost. I do not want a rough idle. I have searched and really I am still not sure. Should I buy 550cc or 440cc? Thanks in advance!






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Old 09-26-2002, 11:38 PM   #2
Delicious Tuning
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I am pretty sure you can get a smooth idel even with 550cc injectors. I am currently running 440cc injectors btu I have raised the fuel pressure quite abit, I believe I have it set to about 53 at idle. And it still runs smooth.
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Old 09-27-2002, 01:04 AM   #3
Midwayman
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Im at about the same point as you... seems the 440's are perfect for 7-8 psi, but 10 would be pushing them. Depends where you want to go in the future I guess.
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Old 09-27-2002, 03:22 AM   #4
Delicious Tuning
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For 6-8 PSI, 440cc's will work well, like you said around 10 PSI you might want to keep a closer eye on things. That si why I have rasied the fuel pressure so i don't have to buy more injectors.
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Old 09-27-2002, 08:41 AM   #5
cpu77
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Default Bigger Injectors

Well when my motor pukes I would like to put a cobb stage 3 block with stage 2 heads. I would guess 550cc maybe ok for that. I doubt it though. If you think about Shiv's kit comes with 550cc injectors I believe. I think 550cc should work well . I just wanted to see your opinions. Jacking the fuel preasure up is a good bandaid. I can go bigger without doing that since I have not bought them yet I wonder if there is a base map that will get it running with 550cc injectors ? Skywalker have had your car on a dyno yet? I will have to do the cobb switch to RWD to do dyno tuning.
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Old 09-27-2002, 11:45 AM   #6
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I have had my car on the dyno but it had problems and overboosted. I am probably going to go back next week some time and see what I can do.
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