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Old 08-16-2013, 05:26 AM   #21
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Old 08-19-2013, 09:01 AM   #22
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We tested our injector pulse dampers in E98 (98% ethanol) alcohol fuel, unleaded gasoline and leaded race gas. These are OEM fuel dampers and have performed very well.


Does the pulse damper impact the gauge at the end of the rail?

I ran the rail without the damper for a few weeks and have since added the pulse damper over the weekend. Now the gauge readings are definitely lower at idle.

No leaks. Runs fine.

Thoughts?
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Old 08-19-2013, 11:29 AM   #23
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Does the pulse damper impact the gauge at the end of the rail?
No. The BMW S54 M3 engine utilizes a 5 BAR (72.5psi) fuel pressure regulator and is vacuum referenced. At idle you should see 60-64psi of fuel pressure (depending on coolant temp which dictates idle speed thus determines vacuum).
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Old 08-19-2013, 07:05 PM   #24
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No. The BMW S54 M3 engine utilizes a 5 BAR (72.5psi) fuel pressure regulator and is vacuum referenced. At idle you should see 60-64psi of fuel pressure (depending on coolant temp which dictates idle speed thus determines vacuum).
The DME also adjusts voltage to the fuel pump as well.
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Old 08-19-2013, 07:25 PM   #25
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The DME also adjusts voltage to the fuel pump as well.
Yup, see page 33 for more details:

http://www.unofficialbmw.com/images/...lectronic2.pdf
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Old 08-20-2013, 09:19 AM   #26
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Thanks Kenton. That document explains the discrepancy. I may have been comparing a stone-cold idle to a warmed up idle on the gauge.

To all of those on the fence - it is awful nice to have this dedicated pressure gauge on the fuel rail with a modified S54. Its a nice looking gauge that compliments the engine bay as well - not easy to do in the aftermarket world.
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Old 08-31-2013, 12:23 PM   #27
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To all of those on the fence - it is awful nice to have this dedicated pressure gauge on the fuel rail with a modified S54. Its a nice looking gauge that compliments the engine bay as well - not easy to do in the aftermarket world.
NOTE: The RADIUM 0-100psi (0-6.9Bar) Fuel Pressure Gauge is silicone filled to dampen injector pulsations and to protect the acrylic lens from excessive vibrations.

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Old 11-04-2013, 12:53 PM   #28
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Originally Posted by Radium View Post
The Walbro 255 would likely suffice but it would be running on the edge at that power level. If you want a quieter pump, use the Walbro 400 gas pump.
Just when i was ready to make a order i found this:

This Walbro 400 LPH Fuel Pump is a universal intank high flow, high pressure fuel pump which can be used in many applications.

Important information for the Walbro F90000262 fuel pump:

Designed for engines with more than 500hp
Award-winning OE technology
High-pressure, high-flow performance
Outperforms all current market in-tank fuel pumps

Requirements for installation:

Modification to wiring, fuel lines and fuel module
Upgraded Aftermarket Fuel Pressure Regulator
Larger Fuel Supply and Return Lines
14 Gauge or Larger Electrical Wiring
15 Amp Fuse, 20-25 Amp Recommended
Professional Installation Recommended
NOT endorsed by Walbro for use in E85 fuel

Failure to follow the above noted suggestions while using this pump in a stock factory fuel system will cause severe drivability issues and could lead to damage of the vehicles fuel system
.


Do i need to worry about? Stock system has 5bar FPR. My car has 3.5bar FPR that came with ESS VT2-550 kit.
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Old 11-04-2013, 01:03 PM   #29
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LAB22 had Dallas Berry's M3 (when stock) running the higher flowing Walbro 416LPH using the BMW wiring, plumbing, and FPR at OEM fuel pressure.
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Old 11-04-2013, 04:53 PM   #30
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LAB22 had Dallas Berry's M3 (when stock) running the higher flowing Walbro 416LPH using the BMW wiring, plumbing, and FPR at OEM fuel pressure.
Do you know if he had any issues with that setup? How many miles did he made?
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Old 11-04-2013, 05:40 PM   #31
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Do you know if he had any issues with that setup? How many miles did he made?
As far as I know it ran great! I never drove the car after the catch can was installed before we boosted it so I can't really say how it did. I am currently running the Walbro 400 E85/Flexfuel setup in my surge tank and all it's still all the oem lines. I'm in the process of upgrading all of the lines for more powa!
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Old 11-04-2013, 06:40 PM   #32
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As far as I know it ran great! I never drove the car after the catch can was installed before we boosted it so I can't really say how it did. I am currently running the Walbro 400 E85/Flexfuel setup in my surge tank and all it's still all the oem lines. I'm in the process of upgrading all of the lines for more powa!
You are convincing me to go forward but i will wait a feedback from radium before making any move.
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Old 11-04-2013, 07:38 PM   #33
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You are convincing me to go forward but i will wait a feedback from radium before making any move.
I wouldn't worry too much. Radiums products are very well engineered.
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Old 11-05-2013, 06:09 AM   #34
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I wouldn't worry too much. Radiums products are very well engineered.
I dont doubt from radium products quality. But you dont buy just because is good. You have to make sure that it will work on your car with the parts that you have on mind to achieve an overall goal. In my case i want to upgrade the worn oem parts to accomplish the ess vt2-550 kit without going beyond what ess develop for this kit, specialy to a point where it need a custom tune. I want to have a solid kit but with all the support from ess if anything goes wrong in the future.
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Old 11-05-2013, 10:05 AM   #35
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FYI: The WALBRO 400 (Ti Automotive pump) is what BMW used in the Z4 (S54 Engine).
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Old 11-05-2013, 01:24 PM   #36
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FYI: The WALBRO 400 (Ti Automotive pump) is what BMW used in the Z4 (S54 Engine).
So the Z4M has a better fuel pump than the M3... Good to hear that.
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Old 03-10-2014, 01:13 PM   #37
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Radium goodies on an N/A build

I have the full suite of Radium gear on my N/A S54 and love it (OCC, Rail/damper/gauge, Fuel pump kit).

-The FP gauge is invaluable for troubleshooting vacuum or fueling issues.
-The ethanol pump/sleeve setup has worked flawlessly as we've tuned for E85 (up to e60 currently).
-The OCC has kept my throttle bodies and CSL aribox filter sparkling clean since install. Intake charges must be cleaner as well.

Don't sell yourself short N/A S54's, Radium's gear is not just for the snail and hairdryer fed S54's.

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Old 03-15-2014, 02:24 PM   #38
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I Too am Convinced.

Going with all of Radium Goodies for the E46 M3 also (OCC, Fuel pump Install kit, FST, Performance Fuel Rail w/guage & Dampener) mated with two Walbro 400e pumps i will get separately (one in-tank, one in the Surge tank kit )
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Old 03-18-2014, 11:05 AM   #39
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FYI: The WALBRO 400 (Ti Automotive pump) is what BMW used in the Z4 (S54 Engine).
Where did you get this information ?
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Old 03-20-2014, 10:24 PM   #40
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Where did you get this information ?
Ironically I just saw one come out of an M Coupe last week. I originally witnessed this pump in a different M Coupe 3 years ago.
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