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Old 07-25-2013, 12:28 PM   #1
Radium
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Want to save your engine at the track?

RADIUM Engineering recently released a bolt-in Fuel Surge Tank specifically for the BMW E46.



This comprehensive installation kit includes everything needed to install a Radium Engineering Single Walbro, AEM, Aeromotive, or Deatchwerks equipped fuel surge tank (FST) in a 1999-2006 BMW E46 3-series. All Radium FSTs feature anodized aluminum surfaces, Teflon insulated wiring, submersible hose, etc. to make them alcohol (ethanol/methanol/E85) compliant. The BMW install kit locates the FST in a collision-safe area of the trunk behind the rear seat.



The bolt-on powdercoated aluminum mounting bracket features rubber isolating grommets to reduce fuel pump noise. Also included is a fully assembled plug and play wiring harness featuring a weatherproof fuse and relay to drive the FST's fuel pump. A Delphi weatherpak connector is also provided for the fuel pump trigger activation to make the entire system modular.



Included are 8 PTFE (Teflon) hoses which are cut to length and preassembled. The PTFE liner is great for all types of fuel, especially with high alcohol contents, such as ethanol (E85). Unlike standard rubber hose, PTFE is non-permeable and eliminates any possible fuel vapor smell.



These PTFE hoses use anodized aluminum hose ends are cut-to-length specifically for this application. The inner stainless steel braid resists extreme fuel pressures and is covered with black PVC which gives the hose added protection from debris and provides abrasion protection. Supplied in -6AN size only.



The PTFE hoses mate at a junction point in the trunk using 4 bulkheads fittings and a billet aluminum plate for interior aesthetics.



For more information go HERE.

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Old 07-25-2013, 02:21 PM   #2
Commanderwiggin
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Very nice stuff as always, makes me glad my system is almost all fully Radium now...just the in-tank pump left
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Old 07-26-2013, 08:25 AM   #3
InDiGlOM3
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Re: Want to save your engine at the track?

Looks like enough line to go all the way upfront getting ride of all factory fuel lines?

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Old 07-26-2013, 11:50 AM   #4
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Originally Posted by InDiGlOM3 View Post
Looks like enough line to go all the way upfront getting rid of all factory fuel lines?
The OEM hose (upfront) is retained unless you use the RADIUM Fuel Rail Kit


The RADIUM fuel rail's PTFE (Teflon) hose replace's the OEM rubber hose that connects to the factory fuel pressure regulator (shown below)


With the RADIUM FST kit the included PTFE hoses attach to the OEM connections at the BMW fuel tank. So you can still replace all of the tube/hose from the BMW tank forward, if need be.

But keep in mind, hose ID size is usually overrated. We know of a certain S54 making over 800rwhp on E85 with -6AN (3/8") feed hose!
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Old 07-26-2013, 03:04 PM   #5
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labor, attention to detail are awesome. Keep up the good work.

I ll buy a set of these for my street S54B35.
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Old 07-26-2013, 04:38 PM   #6
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Awesome explination of the video until now I was confused how it worked....

Have any e46 actually had problems with air getting to the fuel rail though? What happens when air does get to fuel rail? Boom?
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Old 07-27-2013, 12:25 PM   #7
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Want to save your engine at the track?

When tanks gets about 1/3 full on the track, you will get stuttering on long sweepers. It gets really annoying and I'm sure it wreaks havoc with your a/f ratios.

Surge tank is definitely a good fix. Until then, I just keep the tank over 1/2 full but if I had the money, I would just buy the kit.


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Old 08-01-2013, 12:29 AM   #8
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Very Nice.
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Old 08-04-2013, 12:02 PM   #9
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Originally Posted by Minnoe07 View Post
When tanks gets about 1/3 full on the track, you will get stuttering on long sweepers. It gets really annoying and I'm sure it wreaks havoc with your a/f ratios. Surge tank is definitely a good fix. Until then, I just keep the tank over 1/2 full but if I had the money, I would just buy the kit.
Think about a 900hp gas guzzler on ethanol! This combination required a full tank every 30min session. JP has datalogs of misfires and dangerous AFRs when he would track this M3.

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Old 08-24-2013, 03:56 PM   #10
dan avoN7
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What do we have here


Radium FST Kit Very impressive to see person, great quality!


Just getting started with the install




Thanks for the great service Lab22! Ordered Wednesday and received Friday
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Old 08-24-2013, 10:31 PM   #11
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Jelly!!!! I gotta pickup a kit from the guys over at lab22 when I can swing it!
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Old 08-25-2013, 02:12 AM   #12
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Originally Posted by dan avoN7 View Post
What do we have here


Radium FST Kit Very impressive to see person, great quality!


Just getting started with the install




Thanks for the great service Lab22! Ordered Wednesday and received Friday
Wow, that's a clean looking ride Dan!
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Old 08-25-2013, 05:38 AM   #13
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Very Nice!!
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Old 08-25-2013, 09:24 AM   #14
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Nice interior!! Very clean and so much race going on, why cause "Race Car".
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Old 08-26-2013, 07:05 AM   #15
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I absolutely Love this kit....i gotta figure out how to fit this kit in my M3
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Old 08-28-2013, 04:39 PM   #16
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Originally Posted by lrinco01 View Post
I gotta figure out how to fit this kit in my M3
FYI: The RADIUM BMW FST Kit is independent of the HPF turbo kit's fuel system.

It also solves the fuel pressure drop (lean condition) found with HPF Stage 2.5 M3s because all of the (selectable) FST pumps outflow the BMW pump.
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