[RB26] dual feed rail + twin bosch 044 setup - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

brtl · 3rd April 2010, 11:28 AM

I'm at the moment building my fuel system,
and a little bit concerned about fuel rail and lines.

avalible parts :

* dual feed fuel rail
* aeromotive FPR
* bosch 044 x2
* fuel filters x2
* cusco 1,2liter swirl pot.
* couple of meters of braided hose 7,5mm
* collection of earls an6 fittings

R32 Combat · 3rd April 2010, 01:25 PM

#2

Be aware that the system tries to return 99% of the pumped fuel when the engine is idleing, so make sure you have a good sized return.

brtl · 3rd April 2010, 01:35 PM

thanks for your interest.
thought so too, also wondering if my swirl pot 1.2liters wouldnt be too small for 2x 044 ?

what do u mean by good sized return ?
***934;7,5mm for in/out hoses is good or not ?

cheers !

R32 Combat · 3rd April 2010, 01:50 PM

How many thousand gazillion HP are you running to need 2 pumps?

brtl · 3rd April 2010, 05:09 PM

goo question, second pump sounds like an overkilll for me too

my wish is to get some 5** on dyno print

R32 Combat · 3rd April 2010, 07:21 PM

You can see 500 with 1 044 easy.

brtl · 3rd April 2010, 07:36 PM

okay even if so is it better to use dual feed entry or is it completely not necessary ?

kismetcapitan · 4th April 2010, 02:15 AM

#1. I use that setup although my 044s are both in-tank. Same Aeromotive fpr, but one very critical addition. Each end of the fuel rail is fitted with an Aeromotive checkvalve. I run my turbos a bit harder than most, so a single 044 might be at the limit, but two is overkill. That being said, 600bhp cars are right on the fence between single and dual pumps.

But my main purpose for choosing the #1 design is that, with the checkvalves, a fuel pump can fail and although rail pressure will fall by about 0.5 bars, the remaining pump can still support 1.5 bars boost (on my car) and by readjusting the fpr, you could drive around quite normally until you get around to replacing the dead pump.

In single pump systems, a dead pump equals a flatbed. And if it dies when you are hard on boost, you can run lean and melt your pistons. Rare, but it happened to me.

Chris Wilson · 4th April 2010, 01:44 PM

I use a stock rail with -8 fitting one end and a -6 on the other, for the return. Many after market rails actually have a smaller bore than the stock one, the HKS on for example

In your third drawing you show the return from the rail going to ther main tank, which is incorrect, it should always go back to the swirl pot.

This is what I made for my car, I may use it with another engine (a 6.3 litre race V6 that drinks fuel, so the very large swirl pot and double 044 pumps were fitted, which is probably overkill for a 500 BHP RB26) :

IrfanView HTML-Thumbnails

RB26 240Z · 4th April 2010, 05:16 PM

Quote:

Originally Posted by Chris Wilson

I use a stock rail with -8 fitting one end and a -6 on the other, for the return. Many after market rails actually have a smaller bore than the stock one, the HKS on for example

In your third drawing you show the return from the rail going to ther main tank, which is incorrect, it should always go back to the swirl pot.

This is what I made for my car, I may use it with another engine (a 6.3 litre race V6 that drinks fuel, so the very large swirl pot and double 044 pumps were fitted, which is probably overkill for a 500 BHP RB26) :

IrfanView HTML-Thumbnails

I will be running this set up but with the return from the fuel rail going back to the main tank why return hot fuel into the swirl pot ?

brtl · 4th April 2010, 05:30 PM

to keep the swirl tank full.

R32 Combat · 4th April 2010, 05:33 PM

Why bother with any of it? A single pump in the tank is ok.

RB26 240Z · 4th April 2010, 05:46 PM

Quote:

Originally Posted by brtl

to keep the swirl tank full.

With hot fuel i am running 2 lifter pumps from the main to keep the tank full.

ru' · 4th April 2010, 07:21 PM

Quote:

Originally Posted by Chris Wilson

...This is what I made for my car...IrfanView HTML-Thumbnails

Sorry for the hijack (and the dumb question) - what are the two blue cylinders in between the fuel pumps?

Chris Wilson · 4th April 2010, 07:40 PM

Quote:

Originally Posted by ru'

Sorry for the hijack (and the dumb question) - what are the two blue cylinders in between the fuel pumps?

They are fuel filters (cleanable) and there's another one between the in tank lift pump and the swirl pot.

3rd April 2010, 11:28 AM	#1 (permalink)
brtl brtl is unaware they can edit their status GTR Register User Join Date: Nov 2008 Location: warsaw/bristol Cars owned: R34 GTR Posts: 494	[RB26] dual feed rail + twin bosch 044 setup I'm at the moment building my fuel system, and a little bit concerned about fuel rail and lines. avalible parts : * dual feed fuel rail * aeromotive FPR * bosch 044 x2 * fuel filters x2 * cusco 1,2liter swirl pot. * couple of meters of braided hose 7,5mm * collection of earls an6 fittings __________________ Last edited by brtl; 3rd April 2010 at 01:36 PM..

3rd April 2010, 01:25 PM	#2 (permalink)
R32 Combat R32 Combat is in limbo Spannering again. Join Date: Jan 2004 Location: Berkshire Cars owned: R33 GTR Posts: 7,567	#2 Be aware that the system tries to return 99% of the pumped fuel when the engine is idleing, so make sure you have a good sized return. __________________ SKYLAB FUSION. The 3rd generation torque split controller for the ultimate driving experience. This replaces your old G-Sensor for a digital, faster responding, unit along with offering the driver the ability to alter the balance of the cars 4WD power delivery for the optimum balance. A free fitting service is available at Skylab HQ, which is postcode RG19 Only £229. plus £10 p&p worldwide tracked postage Also available in the GTROC online shop To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts. Last edited by R32 Combat; 3rd April 2010 at 01:28 PM..

3rd April 2010, 01:35 PM	#3 (permalink)
brtl brtl is unaware they can edit their status GTR Register User Join Date: Nov 2008 Location: warsaw/bristol Cars owned: R34 GTR Posts: 494	thanks for your interest. thought so too, also wondering if my swirl pot 1.2liters wouldnt be too small for 2x 044 ? what do u mean by good sized return ? **934;7,5mm for in/out hoses is good or not ? cheers ! __________________ Last edited by brtl; 3rd April 2010 at 01:38 PM..*

3rd April 2010, 01:50 PM	#4 (permalink)
R32 Combat R32 Combat is in limbo Spannering again. Join Date: Jan 2004 Location: Berkshire Cars owned: R33 GTR Posts: 7,567	How many thousand gazillion HP are you running to need 2 pumps? __________________ SKYLAB FUSION. The 3rd generation torque split controller for the ultimate driving experience. This replaces your old G-Sensor for a digital, faster responding, unit along with offering the driver the ability to alter the balance of the cars 4WD power delivery for the optimum balance. A free fitting service is available at Skylab HQ, which is postcode RG19 Only £229. plus £10 p&p worldwide tracked postage Also available in the GTROC online shop To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

3rd April 2010, 05:09 PM	#5 (permalink)
brtl brtl is unaware they can edit their status GTR Register User Join Date: Nov 2008 Location: warsaw/bristol Cars owned: R34 GTR Posts: 494	goo question, second pump sounds like an overkilll for me too my wish is to get some 5** on dyno print __________________

3rd April 2010, 07:21 PM	#6 (permalink)
R32 Combat R32 Combat is in limbo Spannering again. Join Date: Jan 2004 Location: Berkshire Cars owned: R33 GTR Posts: 7,567	You can see 500 with 1 044 easy. __________________ SKYLAB FUSION. The 3rd generation torque split controller for the ultimate driving experience. This replaces your old G-Sensor for a digital, faster responding, unit along with offering the driver the ability to alter the balance of the cars 4WD power delivery for the optimum balance. A free fitting service is available at Skylab HQ, which is postcode RG19 Only £229. plus £10 p&p worldwide tracked postage Also available in the GTROC online shop To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

3rd April 2010, 07:36 PM	#7 (permalink)
brtl brtl is unaware they can edit their status GTR Register User Join Date: Nov 2008 Location: warsaw/bristol Cars owned: R34 GTR Posts: 494	okay even if so is it better to use dual feed entry or is it completely not necessary ? __________________ Last edited by brtl; 3rd April 2010 at 07:42 PM..

4th April 2010, 02:15 AM	#8 (permalink)
kismetcapitan kismetcapitan is like trees in November... GTROC Member Join Date: Nov 2005 Location: Nashville TN Cars owned: BNR32 (RIP), Audi RS6, 2012 BMW S1000RR, 2000 Ducati ST4 Posts: 8,769	#1. I use that setup although my 044s are both in-tank. Same Aeromotive fpr, but one very critical addition. Each end of the fuel rail is fitted with an Aeromotive checkvalve. I run my turbos a bit harder than most, so a single 044 might be at the limit, but two is overkill. That being said, 600bhp cars are right on the fence between single and dual pumps. But my main purpose for choosing the #1 design is that, with the checkvalves, a fuel pump can fail and although rail pressure will fall by about 0.5 bars, the remaining pump can still support 1.5 bars boost (on my car) and by readjusting the fpr, you could drive around quite normally until you get around to replacing the dead pump. In single pump systems, a dead pump equals a flatbed. And if it dies when you are hard on boost, you can run lean and melt your pistons. Rare, but it happened to me. __________________

4th April 2010, 01:44 PM	#9 (permalink)
Chris Wilson Chris Wilson is unaware they can edit their status GTR Register User Join Date: Aug 2001 Location: Shropshire Cars owned: R33 GTS-t with RB26 engine and Tractive dog box. And too many race cars according to `er indoors... Posts: 3,116	I use a stock rail with -8 fitting one end and a -6 on the other, for the return. Many after market rails actually have a smaller bore than the stock one, the HKS on for example In your third drawing you show the return from the rail going to ther main tank, which is incorrect, it should always go back to the swirl pot. This is what I made for my car, I may use it with another engine (a 6.3 litre race V6 that drinks fuel, so the very large swirl pot and double 044 pumps were fitted, which is probably overkill for a 500 BHP RB26) : IrfanView HTML-Thumbnails __________________ Last edited by Chris Wilson; 4th April 2010 at 01:50 PM..

4th April 2010, 05:30 PM	#11 (permalink)
brtl brtl is unaware they can edit their status GTR Register User Join Date: Nov 2008 Location: warsaw/bristol Cars owned: R34 GTR Posts: 494	to keep the swirl tank full. __________________

4th April 2010, 05:33 PM	#12 (permalink)
R32 Combat R32 Combat is in limbo Spannering again. Join Date: Jan 2004 Location: Berkshire Cars owned: R33 GTR Posts: 7,567	Why bother with any of it? A single pump in the tank is ok. __________________ SKYLAB FUSION. The 3rd generation torque split controller for the ultimate driving experience. This replaces your old G-Sensor for a digital, faster responding, unit along with offering the driver the ability to alter the balance of the cars 4WD power delivery for the optimum balance. A free fitting service is available at Skylab HQ, which is postcode RG19 Only £229. plus £10 p&p worldwide tracked postage Also available in the GTROC online shop To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

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