fuel system
01-01-2011, 04:47 PM
#1
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fuel system doing a 355 build. goal is 400 hp at motor. can i use stock injectors or do i need bigger. and what size will be necessary if i do and where can i get injectors?
01-01-2011, 04:59 PM
#2
Recommended injector sizing for a 400HP N/A motor =
400 x .07 = 28# injectors.
Just about every site sponsor sells injectors, like LS1speed.com, etc. I personally run the Lucas/Delphi injectors, but Ford SVOs would work fine too. Avoid the Accel injectors though - not too many good reviews from them.
400 x .07 = 28# injectors.
Just about every site sponsor sells injectors, like LS1speed.com, etc. I personally run the Lucas/Delphi injectors, but Ford SVOs would work fine too. Avoid the Accel injectors though - not too many good reviews from them.
01-01-2011, 05:02 PM
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Recommended injector sizing for a 400HP N/A motor =
400 x .07 = 28# injectors.
Just about every site sponsor sells injectors, like LS1speed.com, etc. I personally run the Lucas/Delphi injectors, but Ford SVOs would work fine too. Avoid the Accel injectors though - not too many good reviews from them.
400 x .07 = 28# injectors.
Just about every site sponsor sells injectors, like LS1speed.com, etc. I personally run the Lucas/Delphi injectors, but Ford SVOs would work fine too. Avoid the Accel injectors though - not too many good reviews from them.
01-01-2011, 07:35 PM
#4
Simple, yet very accurate.
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01-02-2011, 11:06 PM
#8
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i still dont know what i need. im not doubting your friends formula im just undereducated and there are too many opinions. the shop building my motor told me to buy the biggest injectors i can for a tune. and my buddy said hethinks the stocks will push enough?
01-02-2011, 11:20 PM
#9
Find a new shop then. For ONLY 400 crank HP you don't need more than a 28# injector.
Here's a real-world example. Assuming a 20% drivetrain loss, my motor sees about 550 flywheel HP. So using the .07 formula, ideally, I would need at least 38.5# injectors, so I went with 42# injectors. At WOT, I see no more than 82% duty cycle, so the 42# injectors are perfect.
Here's a real-world example. Assuming a 20% drivetrain loss, my motor sees about 550 flywheel HP. So using the .07 formula, ideally, I would need at least 38.5# injectors, so I went with 42# injectors. At WOT, I see no more than 82% duty cycle, so the 42# injectors are perfect.
01-03-2011, 02:49 PM
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Find a new shop then. For ONLY 400 crank HP you don't need more than a 28# injector.
Here's a real-world example. Assuming a 20% drivetrain loss, my motor sees about 550 flywheel HP. So using the .07 formula, ideally, I would need at least 38.5# injectors, so I went with 42# injectors. At WOT, I see no more than 82% duty cycle, so the 42# injectors are perfect.
Here's a real-world example. Assuming a 20% drivetrain loss, my motor sees about 550 flywheel HP. So using the .07 formula, ideally, I would need at least 38.5# injectors, so I went with 42# injectors. At WOT, I see no more than 82% duty cycle, so the 42# injectors are perfect.
