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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > N54 port injection question



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      08-01-2024, 09:29 AM   #1
scymatical
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N54 port injection question

Do you have to run 2 fuel pumps for port injection or can you run 1 big fuel pump to run it?
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      08-02-2024, 12:53 PM   #2
whyzee125
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Quote:
Originally Posted by scymatical View Post
Do you have to run 2 fuel pumps for port injection or can you run 1 big fuel pump to run it?
Generally speaking, if you need enough fuel for port injection you'll need to run 2 pumps but yes, you can run PI off of one large pump like a Walbro 535
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      08-03-2024, 06:32 PM   #3
scymatical
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Yea I currently have a 535 pump so I’m guessing there is a T I can buy for the port injection line
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      08-04-2024, 03:14 AM   #4
whyzee125
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Quote:
Originally Posted by scymatical View Post
Yea I currently have a 535 pump so I’m guessing there is a T I can buy for the port injection line
Yes, all the PI kits will come with lines to T off with one side going to the HPFP and the other to the PI rail
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