Sufficient fuel system for 500rwhp?

[mefarri]

As far as the check valve on the 044 goes, isn't that there just for startup purposes?

And if you need a nice, sealed electrical bulkhead, I'll probably have one for you.  A friend of mine is buying 1 from Pave and they require a minimum $100 order which means buying 2 of them.  It'd be $65 shipped.  It's part # 3053X.  This isn't the bullshit bulkhead stuff some people use with seal maker.  It's o-ringed and hermetically sealed.  Really nice piece.  If you're interested, pm me. 

[frijolee]

You put your bulkhead connector in the sender lid and use a barbed adapter on the side inside the tank, then simply connect that to the pump with the piece of hose they supply with the pump, with FI clamps on each end.  Simple and easy.
...
That Walbro has an internal check valve... You don't have to do anything.
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Stock is fine for that Walbro pump, it's current draw is probably less than the factory stock Denso pump.

Tracy,
I'm not sure I have enough space to package the tip of the bulkhead, a -8 female to -8 female, conversion fitting from -8 male to -6 male, and then -6 female to a 5/16" barb, fuel hose then the pump [Edit, N/M, found -8 female to -6 males.  That at least cuts it down by 1 extra fitting].   I suppose if I can't make it fit I could get two fittings welded together to make my own -8 to 5/16" hose barb.   Thanks for the heads up on the other fronts.

The 400 claims it pulls about 16 amps at 65 psi.
http://www.vepetersen.com/images/stories/3950_DCSS_Fact_Sheet_w_vep_logo.pdf

Mefarri,
Thanks for the Pave 3053x reference.  Yes I'm at least interested in the connector.  The price list claims it's only about $10 though.  http://www.pavetechnologyco.com/html/pricelist.html


For anyone who's gotten this far and like me is suddenly thinking that doing this the 044 way would be much easier fitting wise.  The downside is that it costs more, it's loud, and it flows less.  Here's an Evo that was running out of fuel with the Bosch 044 in tank at around 600 rwhp, the shop swapped in Walbro 400, and look at the AF ratio's suddenly go pig rich on the tune it had before.

[attachimg=1]

I found a phone number for Walbro tech support so I'm going to try them at lunch and see if there's anything more elegant I can do, plus triple check that it actually has a 5/16" barb output.

[Speedfab]

I found a phone number for Walbro tech support so I'm going to try them at lunch and see if there's anything more elegant I can do, plus triple check that it actually has a 5/16" barb output.

...Where a phone jockey will just ready you what they have printed on a spec sheet.  Luckily, I am here to hook you the F up.

[attachimg=1]

What you see here is the measurement of the shank portion of the outlet barb, it is .360.  The OD of the barb itself (widest point) is .400.  Given this, I would use 3/8 hose to attach it and make sure it's clamped very securely.  If you want a -8 bulkhead with a 3/8 hose barb machined onto the end sticking into the tank, just send me your address and paypal me $20.  That's how I normally do this.

[digitalsolo]

Tracy = the man.

[Speedfab]

Tracy = the man.

[mefarri]

That price I assume is for bulk orders.  He said they don't do a whole lot of small orders for individuals.  The guy said a single piece is $50 plus shipping, so 2 =$100 plus shipping.  That's where the price came from.

That's interesting about the walbro 400 outflowing the bosch.  I'd be interested in how the 400 does for boosted applications as far as flow fall off as pressure increases.  I know the bosch is really stout in that area.

[frijolee]

 

Thanks Tracy.  I was basing the incorrect info on a pic of the install kit showing 5/16 line.  I'm not even sure it was the right kit or just a stock photo. I'll be damned if you can find proper info on those either.  Walbro may make a decent product but their published info is crap.  Let me pull my pump out and see how much space I have.  I know I can get a -8 female to 3/8" hose barb, but if that's still too tall, I'll take you up on the machined bulkhead version.

-Joel

PS Pet peeve of the last two days: "AN-8" is just about impossible to Google for since the engine ignores symbols and capitalization.

[frijolee]

That price I assume is for bulk orders.  He said they don't do a whole lot of small orders for individuals.  The guy said a single piece is $50 plus shipping, so 2 =$100 plus shipping.  That's where the price came from.

That's interesting about the walbro 400 outflowing the bosch.  I'd be interested in how the 400 does for boosted applications as far as flow fall off as pressure increases.  I know the bosch is really stout in that area.

044 is a much flatter curve and the cross over is about 80 psi.  Some of the supra guys added a few other pumps to the 400's chart.  Let me take a closer look at the factory connector and I'll get back to you on the bulkhead yes or no.  The below tends to suggest I'm going to almost double my existing current draw vs. the 255 single I have now (it's the only added amp curve in green).



Again, I really appreciate the help fellas. 
-Joel

[Sabre002]

Joel your wrong on the 044 being loud.  It is all in how you mount it.  The Walbro I had in my car made more noise then the 044 does now. 

[frijolee]

Point taken, loud is relative and mounting matters a great deal. 

Most of the guys bitching about the Bosch were running it hard-mounted as an external pump. To be fair, the Walbro 255 isn't a quiet pump either.  I can hear mine changing pitch slightly in time with my turn signals at a stoplight.  However, the 400 is supposed to be just about silent because they changed the blades to a turbine style, same is true for the Aeromotive Stealth 340.

[Jordan Innovations]

Tracy that's awesome.

That 600whp Evo dyno curve that was posted was certainly not N/A, so based on that I'd say it's outperforming the 044 in boost.

I have two Walbro 255's mounted externally (but vibration isolated) and they're definitely louder than an A1000 in the Stealth-series fuel cell.  I'd be interested to hear the new 400 to compare...

[Sabre002]

Point taken, loud is relative and mounting matters a great deal. 

Most of the guys bitching about the Bosch were running it hard-mounted as an external pump. To be fair, the Walbro 255 isn't a quiet pump either.  I can hear mine changing pitch slightly in time with my turn signals at a stoplight.  However, the 400 is supposed to be just about silent because they changed the blades to a turbine style, same is true for the Aeromotive Stealth 340.

i just cant bring myself to ever use walbro again.  Here is my reason on my car.

[Speedfab]

Thanks Tracy.  I was basing the incorrect info on a pic of the install kit showing 5/16 line.  I'm not even sure it was the right kit or just a stock photo.

The install kit that comes with the pump DOES have 5/16 hose.  You have to push pretty hard to get it on the pump but it goes.

[Bean4g63]

For anyone who's gotten this far and like me is suddenly thinking that doing this the 044 way would be much easier fitting wise.  The downside is that it costs more, it's loud, and it flows less.  Here's an Evo that was running out of fuel with the Bosch 044 in tank at around 600 rwhp, the shop swapped in Walbro 400, and look at the AF ratio's suddenly go pig rich on the tune it had before.

[attachimg=1]

I ran a single Bosch -044 and made 670whp/525ft=lbs of tq on a 4G63 with 1000cc injectors.  The pump lasted 6 years without a hiccup before I parted the car out.   Sounds to me like something else was going on with that Evos fuel system.  The Bosch pumps will take 85-100psi of fuel pressure without issues.  The Walbros tend to bleed off pressure above 80psi.  I am not knocking Walbro pumps as I have a Walbro 400 in my RX7 now and it works great but I just think that the -044 is all around a better pump.