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What are the biggest injectors the stock computer can control?

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Old 06-19-2011, 12:27 AM
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Default What are the biggest injectors the stock computer can control?

I am doing a turbo build swap on my Buick with a 5.3 and was trying to figure out if I can use a F-body PCM or do I need to go with one of the expensive setups like big stuff 3? I plan on running on E85 which requires about 30% more fuel than gas for same power so by calculations I would need around 120lb hr. injectors for what I plan to run.
Old 06-19-2011, 01:14 AM
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i have 80lbs at 43psi injectors turned to 80psi and im making 600whp on e85 at 60% duty cycle. A aftermarket fuel pressure regulator with a boost reference with higher fuel pressure would be a better idea for you then trying to shove the biggest injector in there.
Old 06-19-2011, 01:28 AM
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I know I just looked on Summit. They sell a boost referenced non return inline regulator that is good up to 75 psi for about 100 bucks. I will likely go that route with a Summit 450gph inline fuel pump. The 6765 turbo I am looking at is rated at 900 hp but to get that it likely would need to be on kill at 35 psi. I likely would see around 700-750 at the flywheel at the boost I would be running. What brand 80 injectors and do they fit in the stock or fast intake.
Old 06-19-2011, 01:51 AM
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Originally Posted by TurbopigB4C
I know I just looked on Summit. They sell a boost referenced non return inline regulator that is good up to 75 psi for about 100 bucks. I will likely go that route with a Summit 450gph inline fuel pump. The 6765 turbo I am looking at is rated at 900 hp but to get that it likely would need to be on kill at 35 psi. I likely would see around 700-750 at the flywheel at the boost I would be running. What brand 80 injectors and do they fit in the stock or fast intake.
i have siemens 80's, they run about 350 for 8 brand new. And yes they were completely a stock replacement injector. They flow some good numbers at higher pressures. I was scared of running out of fuel on my tc78 ls2 so i did a magnafuel pump with 8an lines and i have plenty of fuel. im on e85 also and i did the online calulators like your probably doing and i was kinda over killing it but oh well i guess.
now im only at 600whp and im going for the 800whp mark here soon once my new shortblock is done so were see how well my fuel system is.
Old 06-19-2011, 01:58 AM
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always wanted to see the idle quality on these,they are flipping huge! and would work with the stock computer and be a direct replacment

160 lb Bosch High Impedance Fuel Injector
Old 06-19-2011, 02:00 AM
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my 80's at 80psi are 114lbs a hour btw.
Old 06-19-2011, 02:52 AM
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Originally Posted by BLINGOLE
always wanted to see the idle quality on these,they are flipping huge! and would work with the stock computer and be a direct replacment

160 lb Bosch High Impedance Fuel Injector
I have these, they make my car idle like almost stock. They aren't cheap but they are worth it. I would never go to a low-z injector ever again.
Old 06-19-2011, 03:10 AM
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where did u find the high imp that large. I wana make 750whp on e85. And keep stock comp too
Old 06-19-2011, 10:30 AM
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Check out Fuel Injector Connection. They have 2000cc (190/hr) hi impedence too. Im using a set in a soon to be 1000rw GTO on E85 with stock computer.
Old 06-19-2011, 11:38 AM
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$153.87 from fuel injector connection. Is there such a thing as too big of an injector? Im looking for 1k rwhp from my 6.0 build set on kill with a street tune of 7-800 and I don't want to be maxing out a smaller set of injectors
Old 06-19-2011, 06:45 PM
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Here is the link for them and a few others.
http://www.corvetteinjectors.com/sho...php?groupid=18

These guys are awesome to deal with. They will send you all the information to make them run. So there is no guessing. Plus you do not need any driver/ resistor boxes, these are plag in play. And they play nice with the stock PCM.
Old 06-19-2011, 08:33 PM
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I have 160 high imp in mine. idles like stock also. They also make 225# ones.
http://billetatomizerinjectors.com/



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