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Forced Induction Forum
Discuss supercharging, turbocharging and even nitrous and water injection here.

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Old 03-08-2016, 04:09 PM   #21
Mafik
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What a reason to install external FPR instead stock FPR? I checked work diagram for stock FRP, Aeromotive and Nuke performance. Except ability to adjust fuel presure work schema of these FPR is the same. Correct me if I'm wrong.
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Old 03-08-2016, 07:03 PM   #22
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The main reason I chose to run an upgraded FPR was to handle the flow of the upgraded Walbro 450 fuel pump. The stock filter/regulator unit cannot regulate the flow sufficiently from a pump that powerful. I also wanted to make sure I would not run into reliability issues, so I wanted to run a fine steel mesh filter, which cannot be affected by E85 ethanol fuel. Often time the paper elements can break down. The ability to tune the pressure is just a plus after the fact. Waiting on the filter to get delivered and ill have it in soon and post up how it ends up.
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Old 03-08-2016, 09:00 PM   #23
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Does anyone know the best way to install a Walbro 450 into our factory hanger? I see the 450lph's are mushroom shaped and not cylindrical like the factory pump.

I did find this install guide for an E46 M: http://www.m3forum.net/m3forum/showthread.php?t=445094
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Old 03-08-2016, 11:46 PM   #24
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Originally Posted by mrbobmicjoe View Post
Does anyone know the best way to install a Walbro 450 into our factory hanger? I see the 450lph's are mushroom shaped and not cylindrical like the factory pump.

I did find this install guide for an E46 M: http://www.m3forum.net/m3forum/showthread.php?t=445094
I was told this is the right piece, and what I am using. Look toward the bottom for the fuel pump adapter sleeve. Seems to be pretty universal- http://www.cesmotorsport.com/documents/62.html
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Old 03-09-2016, 09:36 AM   #25
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Originally Posted by Pole position View Post
The main reason I chose to run an upgraded FPR was to handle the flow of the upgraded Walbro 450 fuel pump. The stock filter/regulator unit cannot regulate the flow sufficiently from a pump that powerful. I also wanted to make sure I would not run into reliability issues, so I wanted to run a fine steel mesh filter, which cannot be affected by E85 ethanol fuel. Often time the paper elements can break down. The ability to tune the pressure is just a plus after the fact. Waiting on the filter to get delivered and ill have it in soon and post up how it ends up.
Why do you think, that stock FPR will not regulate the flow sufficiently? Work schema of stock and external FPR is the same. Walbro 450 can provide more fuel for larger injectors, but stock FPR will regulate required fuel presure. Rather you will have bottleneck in size of you fuel lines.

I see only following reasons to install external FPR:
1) steel mesh filter
2) FPR after fuel rail
3) Larger fuel lines with AN fittings
4) Larger fuel rail
5) increase fuel presure
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Old 03-09-2016, 09:58 AM   #26
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Quote:
Originally Posted by Mafik View Post
Why do you think, that stock FPR will not regulate the flow sufficiently? Work schema of stock and external FPR is the same. Walbro 450 can provide more fuel for larger injectors, but stock FPR will regulate required fuel presure. Rather you will have bottleneck in size of you fuel lines.

I see only following reasons to install external FPR:
1) steel mesh filter
2) FPR after fuel rail
3) Larger fuel lines with AN fittings
4) Larger fuel rail
5) increase fuel presure
Its been tested on here and its true, fuel flow of such pumps is so high the stock FPR cant handle it.
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Old 03-09-2016, 10:52 AM   #27
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Have a look at an stock FPR


At idle , nearly 450 L / h have to flow through the little hole in the middle of the the FPR .

When I was testing E85 , I mounted a 450 pump in a completly stock fuel system And the feeding lines just fell off at idle ...


I switched back to the stock pump and fuel system, it's bulletproof . Let's see where the limits are .
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Old 03-09-2016, 03:58 PM   #28
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Hm.... I have Walbro 400 and 370cc injectors(will changed to 630cc)with stock FPR and I don't see a problem on idle. How you detect that " feeding lines just fell off at idle"?
Also, on you picture I see FPR which usually not uses on m54 fuel rail, but on m52tu engines. Of course logic for FPR is the same (Bosch style :-) ), but location is different and behaviour is quite different.
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Old 03-09-2016, 04:57 PM   #29
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Very simple it never happened under load conditions sometimes it happened when I turned on only the ignition, but also at traffic lights.

You are right, the original 330i pressure regulator is integrated in the fuel filter and may be a little different. But the e39 M54B30 pressure regulator looks like in the picture.

I used the GST 450 for more than 9 months on daily driver. It works, but it is not reliable. At that time, I had no fuel pressure sensor so I can not say exactly whether the pressure was too high.

However, the standard fuel system is definitely at the limit with such a pump.
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Old 03-09-2016, 05:15 PM   #30
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Jd, if i wanted to go with your solution wouldnt that mean i would have to run new fuel lines to work with the AN fittings?
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Old 03-09-2016, 06:15 PM   #31
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If you want such a high flow pump you will be save to rework the fuelsystem.

But do you need such a pump? Where are the limits of a healthy stock system? Perhaps a slightly stronger pump is the better solution.

I was running the GST 450 because it is rated for E85, but the original pump worked better...

And please excuse my bad english, I hope I use the right words

Last edited by jd improved; 03-09-2016 at 06:17 PM.
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Old 03-09-2016, 07:02 PM   #32
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Originally Posted by jd improved View Post
If you want such a high flow pump you will be save to rework the fuelsystem.

But do you need such a pump? Where are the limits of a healthy stock system? Perhaps a slightly stronger pump is the better solution.

I was running the GST 450 because it is rated for E85, but the original pump worked better...

And please excuse my bad english, I hope I use the right words
My end goal is 400 on pump gas.... I used a fuel pump calculator with these settings: 6 injectors, 650cc flow rate, 50 psi fuel pressure, and 15psi of boost. It recommended a 234 LPH pump. I dont see myself running E85 anytime soon (its a pain in the ass to get where i live) so i think the walbro 450 is a little bit overkill for my application... I was thinking of getting the following pump (excuse the ebay link its just the cheapest place to buy this specific part):
http://www.ebay.com/itm/Flextech-340...BVsbxu&vxp=mtr
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Old 03-10-2016, 03:01 AM   #33
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I tend to think at 400hp M3 pump should be sufficient
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Old 03-10-2016, 03:46 AM   #34
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Originally Posted by daniel_f. View Post
I tend to think at 400hp M3 pump should be sufficient

Thats what i was thinking, but those are expensive! Seems like you can get a walbro pump for half the price of an M3 pump
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Old 03-10-2016, 09:41 AM   #35
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Just Another M54 Turbo Build. By the People, for the People

Just ordered a Tial wastegate. Street Rays has some pretty good deals on them on eBay, about $250. Also ordered a UPR vacuum block. https://www.ebay.com/ulk/itm/400437198445


Any idea what size hoses I will need? Was thinking about getting a decent mix but would make more sense so just get what I need. Seems like everything uses different size fittings.

Also about the cx racing BOV. It seems extremely stiff. I noticed it has two springs and people often remove or cut them. Will this be necessary for the m54? I figure I have a decent amount of vacuum as I'm running a catch can and it really sucks the dipstick and oil cap.

Edit: Hobbit uses both springs and leaves the bottom vent open to atmosphere, so do that.
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Last edited by Pole position; 03-10-2016 at 06:02 PM.
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Old 03-10-2016, 05:57 PM   #36
Pole position
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Just Another M54 Turbo Build. By the People, for the People

Some parts came in today. The injectors came from TRE performance, nicely packed in individual wrappers. They look like injectors, not much to say.

Some turbo fittings also are here, you can see I'm using banjo fittings for the cooling and an extended drain for a clamped 5/8 drain tube to the pan.

Also I am using a red temp sensor sleeve in my lower radiator hose to get coolant for the turbo. This was a cheap eBay item. On the other side I am draining into the block, this calls for a M14x1.5 thread hose nipple.

The K&N fuel filter looks to be a very high quality piece. It's billet, hard anodized, and had a 25 micron steel mesh filter. By blowing through it I can scientifically tell you it flows freely.

The burger air filter is also in. I am impressed with how short it actually is. It's made of a high temp rubber so mounting directly to the compressor is tolerable. Click image for larger version

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Last edited by Pole position; 03-10-2016 at 06:01 PM.
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Old 03-11-2016, 12:04 PM   #37
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Are those 590cc injectors?
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Old 03-11-2016, 12:11 PM   #38
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Yes, here is a link http://treperformance.com/i-23893518...jectors-6.html
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Old 03-15-2016, 10:03 AM   #39
Pole position
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Wastegate and a bunch of hardware came in. The kit is really coming together. Fuel pump install got delayed, and I have to order a set of summer tires and wheels so will probably wait on ordering the rest of the stuff for two weeks. Likely will install rebuilt diff and fuel pump this weekend.

Any word on the flex fuel and boost control on the ms43 wiki? How are the brains behind this thinking of implementing this? Just wondering.

Anyways stay tuned, can't wait to get it running.
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Last edited by Pole position; 03-15-2016 at 10:03 AM.
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Old 03-15-2016, 02:17 PM   #40
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Quote:
Originally Posted by Pole position View Post
Wastegate and a bunch of hardware came in. The kit is really coming together. Fuel pump install got delayed, and I have to order a set of summer tires and wheels so will probably wait on ordering the rest of the stuff for two weeks. Likely will install rebuilt diff and fuel pump this weekend.

Any word on the flex fuel and boost control on the ms43 wiki? How are the brains behind this thinking of implementing this? Just wondering.

Anyways stay tuned, can't wait to get it running.
Flex fuel is still a ways away. I think up next will be live tuning and the boost control, after that maybe flex fuel.
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