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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 > Vishnu N54 Fuel System Research Part 1



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      04-07-2011, 10:26 PM   #133
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Quote:
Originally Posted by shiv@vishnu View Post
It should help stock turbo guys as well. Part 2 coming tomorrow. I have 6hrs worth of bench testing data to compile, summarize and post. In the last two days, i've test driven 800 miles while spending an entire afternoon at RC Engineering using the equipment in their lab. It was pretty awesome
Say Hi to Carol for us! The guys and girl over at RC are great! Great work Shiv and team!

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      04-07-2011, 11:05 PM   #134
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cant wait
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      04-08-2011, 01:33 AM   #135
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OT, but do we know if the X5/6M suffer from HPFP failures?
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      04-08-2011, 08:06 AM   #136
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Stock turbo's are very efficient at lower RPM... lets do some 22psi from 2k-5k tapering to 17 at redline, could be 500wtq down low all day! Reminds me of my SRT4 days... like 400tq and 280whp lol.
for sure, except my SRT could never get traction!
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      04-08-2011, 11:03 AM   #137
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bump
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      04-08-2011, 11:06 AM   #138
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Quote:
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It should help stock turbo guys as well. Part 2 coming tomorrow.
I'm pretty sure it's tomorrow now
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      04-08-2011, 11:17 AM   #139
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Yup. Definitely tomorrow, no matter what coast you're on. Time has come. Spill it...now!
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      04-08-2011, 11:31 AM   #140
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great thread, subscribed.
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      04-08-2011, 11:37 AM   #141
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I see you online shiv!
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      04-08-2011, 11:47 AM   #142
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With the impending increase in fuel system capacity, it would be particularly awesome to integrate mapping for ethanol blends into the fuel system (E85+pump mixes). Or even go all out with a sensor that inputs into the procede, and automatically adjusts lambda for the change in ethanol content. Talk about a fun way to combat rising gas prices!
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      04-08-2011, 12:16 PM   #143
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I see you online shiv!
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      04-08-2011, 12:21 PM   #144
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If indeed changing the voltage curve for the fuel pump controller solves the fueling issue, flash tunes need to find that table in the dme and adjust it. Most likely the LPFP controller uses a load vs rpm map to specify pump voltage. All that needs to be done is to adjust that map up so the pump flows enough for said load/rpm. Cobb better get busy finding this table

I will guess that the lpfp even going wide open does not flow enough and might need to be upgraded anyway. I am curious to see vishnus flow sheet for the pump

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      04-08-2011, 12:28 PM   #145
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Quote:
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Yup. Definitely tomorrow, no matter what coast you're on. Time has come. Spill it...now!
This is off topic, but I just noticed your signature and cars. Nice collection!
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      04-08-2011, 12:36 PM   #146
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With the impending increase in fuel system capacity, it would be particularly awesome to integrate mapping for ethanol blends into the fuel system (E85+pump mixes). Or even go all out with a sensor that inputs into the procede, and automatically adjusts lambda for the change in ethanol content. Talk about a fun way to combat rising gas prices!
This is exactly what I've been thinking! YES!
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      04-08-2011, 12:37 PM   #147
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good info. Looking forward to how part 2 turns out
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      04-08-2011, 12:46 PM   #148
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deff. interested in the outcome of this!
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      04-08-2011, 12:54 PM   #149
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Velly interesting....
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      04-08-2011, 01:02 PM   #150
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It's tomorrow!
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      04-08-2011, 01:18 PM   #151
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It's tomorrow!
+1 Sorry Shiv the man is right, today is tomorrow.
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      04-08-2011, 01:23 PM   #152
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I keep hitting refresh!
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      04-08-2011, 01:24 PM   #153
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      04-08-2011, 01:24 PM   #154
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and i'm right there with them
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