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What Power Level Before Looking Into Dual Pumps

G37Sam

By G37Sam,
in Engines & Forced Induction

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G37Sam Collaborator

G37Sam

Posted
Posted

Hello All,

I'm building an RB26/30 with 1000cc injectors. Till what whp will I be ok with a single in tank 340LPH Aeromotive Fuel Pump?

My tuner recommends I get two Bosch 044's instead however, these don't come with an in tank option, which would mean I'd have to look into a surge tank, which I don't currently want to do.

Can I run an Aeromotive in tank 340 LPH in series with an external bosch 044 and get best of both worlds?

Thanks in advance for your help.

Sam

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Have you got a chart showing how much your pump's flow drops off with increase in pressure? Quite a few people have experience with the limits of a single intank Nismo but it will be different for your pump. Have you got it directly wired with a heavier cable from the battery via relay? What is your power target? You can put 044s intank if you want. You could put a surge tank under the car if you don't want one in the boot but if you're not going to track it don't bother.

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted

You can put 2 x 044's in the tank if you want too but space is normally the issue, we are weighing up this option with mine at the moment and leaning towards twin Aeromotives because they are smaller and quiet, newer etc.....

My single 044 ran out of flow at around 360rwkw (480rwhp) on E85 and didnt leave much buffer room incase a filter gets semi blocked etc (which i have recently experienced).

I am not much of a guru with this sort of thing, just going through it at the moment with my car and learning as i go :)

GTScotT Grand Master

GTScotT

Posted
Posted

Or run the newer model walbro 415 lph e85 compatible intake fuel pump

Good for easy 400+kw at wheels

This.

You will run out of injector before you run out of pump if you go this route.

G37Sam Collaborator

G37Sam

Posted
  • Author
Posted

Have you got a chart showing how much your pump's flow drops off with increase in pressure? Quite a few people have experience with the limits of a single intank Nismo but it will be different for your pump. Have you got it directly wired with a heavier cable from the battery via relay? What is your power target? You can put 044s intank if you want. You could put a surge tank under the car if you don't want one in the boot but if you're not going to track it don't bother.

I'm not sure yet because this will replace the factory fuel pump on my G37. Will have to check how it's wired but I do remember seeing a relay box under my hood with fuel pump written on it.

Also, is this on 98 or E85?

98 RON

You can put 2 x 044's in the tank if you want too but space is normally the issue, we are weighing up this option with mine at the moment and leaning towards twin Aeromotives because they are smaller and quiet, newer etc.....

My single 044 ran out of flow at around 360rwkw (480rwhp) on E85 and didnt leave much buffer room incase a filter gets semi blocked etc (which i have recently experienced).

I am not much of a guru with this sort of thing, just going through it at the moment with my car and learning as i go :)

Oh wow, and that's a very high flowing pump. Looks like I'm going to rock two of them then. Do you keep me posted with your learning please. The thing is, it's never been done on a G37 before, so I'm not sure how everything will play out. Let's see.

Or run the newer model walbro 415 lph e85 compatible intake fuel pump

Good for easy 400+kw at wheels

My tuner recommended me against Walbro, is the 415lph any good?

This.

You will run out of injector before you run out of pump if you go this route.

Guess I'll have to look into it then. Thanks for all your help fellas

scotty nm35 Grand Master

scotty nm35

Posted
Posted

I haven't seen the G37 fuel pump assembly, but if it's the same as the 350z/V35 ones only the Walbro 342 style pumps will fit in the factory housing. I would go for the Deatschwerks 300L in that case.

There are a few twin pump housings around for them, but perhaps you could modify the stock housing to fit the new Walbro 400L E85 pump? If your tuner doesn't like them, he is a year behind the times...

GTR_JOEY Grand Master

GTR_JOEY

Posted
Posted

Nismo/ tomei will flow around 400rwkw on pump depending on who's tuning the car

The walbro's 400s seem to be the sh!t now, I've been running 2 of them in a surge tank with e85 for about 3000km and no issues so far. They are quiet as hell too

As for putting one in the tank, I don't think they are an easy fit like the 044s.. If my memory is correct Piggaz tried putting one in but opted for a 044 as it was less hassle

33GTRV Mentor

33GTRV

Posted
Posted

I went with 2 bosch 044's in an almost identical setup to Paul aka Piggaz set up. the fuel system should have landed me somewhere in the 1500 mark once completed, for rail, pumps, tank, lines, injectors and new reg. Not too expensive for peace of mind mate.

33GTRV Mentor

33GTRV

Posted
Posted

i like to shop around Joey ;) I have only the fuel rail and reg to purchase. 600 for bosch 2000cc, 300 for pumps, 330 for the tank and fittings. I may just pip the 1500 mark, but not by much mang

G37Sam Collaborator

G37Sam

Posted
  • Author
Posted

You're definitely getting some great deals man.

May I ask where you guys normally install your surge tanks? Another reason I stayed away from it was that many told me you get a lot of fuel smell in cabin?

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