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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Limits of stock HPFP



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      05-17-2018, 05:19 PM   #1
WhatDoIPutHere
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Limits of stock HPFP

Hello, I'm sure this has been covered before, but I could not seem to find it. I'm currently planning on getting stage 2 pure turbos installed. Car is 08 335i FBO, with stage 2 lpfp. I was wondering how much whp I can run on an E50 mix without putting too much stress on the HPFP. I understand every car is different, but does anyone know the general rule of thumb for this? Also I am in cali, so gas is terrible
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      05-17-2018, 11:13 PM   #2
Chris@VargasTurboTech
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Healthy car, decent parts, I usually see between 470-530, most just over 500ish before fuel pressure starts to dive. Depends on a lot of things.

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      05-20-2018, 04:28 PM   #3
WhatDoIPutHere
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Quote:
Originally Posted by Chris@VargasTurboTech View Post
Healthy car, decent parts, I usually see between 470-530, most just over 500ish before fuel pressure starts to dive. Depends on a lot of things.

Chris
This is all hypothetical, but is 600whp doable with it? Would only run the tune once every month or so.
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      05-20-2018, 05:09 PM   #4
Chris@VargasTurboTech
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I haven't seen it. It's generally speaking a bad idea to plan on maxing hardware, and a much worse idea to plan on maxing fueling. Proceed cautiously.
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      05-20-2018, 09:57 PM   #5
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A fbo inlet outlet e60 stock turbo car maxed out will outflow or max out the stock hpfp. Based on mymy experience at 22-24psi on a low mileage car with newer injectors and hpfp.
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