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Old Jul 15, 2011 | 12:02 PM
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hey guy what is the most power i can get out of 440cc injectors im planing on boost thing this weekend and im just curious im thinking about getting 550cc but damn money is kinda low so just out of curiosity how much has anyone boosted with 440cc
Old Jul 15, 2011 | 12:48 PM
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I don't think you'll get asingle answer. Best way to check is have your tuner run up the boost and when it starts hitting 80-90% injector duty cycle that's pretty much the limit for your setup.
Old Jul 15, 2011 | 01:05 PM
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ohh ok kool so there is no single threshold just basically all up to the complete setup u have under the hood
Old Jul 16, 2011 | 06:03 PM
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As stated already there is no single correct answer but fwiw I'm running 6 psi and ~260 bhp with 440cc inj's at <90% IDC. Also, the Greddy kit uses 440cc inj's to make 260 bhp. YMMV so maybe start off at 4-5 psi to be safe and tune from there.

Here's a useful tool:

http://www.rceng.com/technical.aspx
Old Jul 18, 2011 | 07:51 PM
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ive said this before, but i wouldnt push them past 250. you need to have buffer room, dont max them out, you will be sorry in the long run
Old Jul 18, 2011 | 09:07 PM
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so then by adding a turbo i def should upgrade the injectors
Old Jul 18, 2011 | 09:08 PM
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i know that it depends on yhe power i wanna put down but if i wanna go anywere beyond 250 i shoild def upgrade
Old Jul 18, 2011 | 11:26 PM
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550cc or bust lol either way ____s gonna be quik. only a few hours till we drop that ____ in
Old Jul 19, 2011 | 04:37 AM
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Originally Posted by Omarc306
i know that it depends on yhe power i wanna put down but if i wanna go anywere beyond 250 i shoild def upgrade
Correct.

440cc = 250 bhp max
550cc = 300 bhp max
630cc = 350 bhp max
750cc = 425 bhp max

The above bhp estimates are based on BSFC of .60, rail pressure of 43.5 psi and <90% IDC.

Last edited by ScionFred; Jul 20, 2011 at 03:33 AM.
Old Jul 20, 2011 | 02:52 AM
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i have a sset of 630 cc injectors that are used for $100.00 i wanted a smaller scale to reduce power, but, if your interested PM me.
Old Jul 20, 2011 | 12:35 PM
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Originally Posted by elemons
i have a sset of 630 cc injectors that are used for $100.00 i wanted a smaller scale to reduce power, but, if your interested PM me.
word for real does it come with the harness?
Old Jul 20, 2011 | 07:33 PM
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i sent you a private message with my info
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