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Sizing fuel injectors

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Old May 29, 2016, 03:03 PM
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Sizing fuel injectors

My current setup is
fp green
fp4r 280 cams
indivia 3" DP
full exhaust, full upper and lower intercooler piping
Walbro 255
JM fab external dump
JM fab exhaust manifold
I want to run e85. Are the fic 1650 blue max low z too big?
Old May 29, 2016, 03:15 PM
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Jp7
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don't you think you should have more fuel pump?
Old May 29, 2016, 03:21 PM
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Originally Posted by Jp7
don't you think you should have more fuel pump?
If I have to upgrade I will. Still pretty new to the evo scene so any help is appreciated.
Old May 30, 2016, 09:32 AM
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That injector size is likely right on the money based on where youre headed

I run 1000cc inj on E85 but Im stock turbo & cams. Duty cycled at 85%

Heres a calculator & thread for you:

http://fuelinjectorclinic.com/flow-calculator

https://www.evolutionm.net/forums/ge...injectors.html
Old May 30, 2016, 10:00 AM
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You're going to need a walbro 450 pump. And I would get FIC Hi-Z 1650 injectors. And you'll have plenty of fuel.
Old May 30, 2016, 11:22 AM
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Okay thank you guys. I'll keep the forum updated as soon as I make the switch to e85
Old May 30, 2016, 03:04 PM
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Jp7
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I use FIC1800cc and buschur double pumper
Old May 31, 2016, 03:46 AM
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Originally Posted by buzzzin_IX
My current setup is
fp green
fp4r 280 cams
indivia 3" DP
full exhaust, full upper and lower intercooler piping
Walbro 255
JM fab external dump
JM fab exhaust manifold
I want to run e85. Are the fic 1650 blue max low z too big?
A good tune should be able to get you into the 480-500hp range if you were to add those injectors into the mix at this point. As was already mentioned a larger fuel pump, or double pumper will really wake things up.

When you get a second, could you shoot me a PM with your impressions of those FP4R cams during idle/spool/topend/daily driving? I have a set I haven't installed yet and I was curious. Thanks
Old May 31, 2016, 06:11 AM
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