Fuel Pumps

[Murry33]

my stock r33 fuel pump is noisy, everyone tells me too haha. sounds cool though......anyhow i made my mechanic check it and test it completely works fine. haven't had a problem with it .........yet

[Busky2k]

^^ Makes me wonder if it really is stock!

[Evil34]

Hey Leeman,

Have just fitted a Walbro to my 34 yesterday, no modifcation to the cradle at all and bolted straight up.

If you are on the cruise on sunday you can come here it as long as i can find the correct thrust bearing carrier for my car as it was not supplied in my Blitz twin plate kit.

My name is Shaun and i will be there with my 4 door manual, come and say hello and i will show you.

[Madaz]

r you planing for some big power for the 34 shaun

[J_Red33]

Are all you guys that are using 044's all mounting them internally out of curiousity?

The best way to get it right it to make sure the pump sits as low as possible yes, but it needs to be eleveated off the bottom just a bit as this can cause cavitation too & therefore a noisy pump.

How long is the sock too? Is it long enough to reach the bottom? I've noted that the standard pump has a very long sock to reach & get a good draw of fuel from the bottom of the tank, if the replacement doesn't do this then you will have problems guranteed.

[Cubes]

Shaun uses the standard stock off the old pump.

Cleans it up and pushes it on to the end of the pump. Measures to to ensure it sits in the cradle exactly the same as the stock pump did and done.

[J_Red33]

Yeah that's exactly what I'm thinking of doing with mine when the time comes (before or after a front mount, not sure yet). The 33's sock is very long I've never seen another like it, so best to stick with the standard sock IMO as long as it's in good nick.

[Leeman]

Hey Leeman,

Have just fitted a Walbro to my 34 yesterday, no modifcation to the cradle at all and bolted straight up.

If you are on the cruise on sunday you can come here it as long as i can find the correct thrust bearing carrier for my car as it was not supplied in my Blitz twin plate kit.

My name is Shaun and i will be there with my 4 door manual, come and say hello and i will show you.

Hi Shaun, okay sounds good, so walbro might be the go then seeing as tho it bolted straight on!!

[dangerman4]

Hi Shaun, okay sounds good, so walbro might be the go then seeing as tho it bolted straight on!!

044 needs 15 minutes to install..

walbro takes 5 minutes to install..

044 = 350 kws

walbro = 250 kws

ive had both and installed both

044 FTW

[Deluxe]

Yeah that's exactly what I'm thinking of doing with mine when the time comes (before or after a front mount, not sure yet). The 33's sock is very long I've never seen another like it, so best to stick with the standard sock IMO as long as it's in good nick.

The fuel pump is only a couple of hundred, and the front mount is alot more! you shouldn't need a fuel pump if you don't have a front mount! wouldn't be making enough power to need the use of a bigger fuel pump!

[Evil34]

An 044 mounted in tank only makes as much power as an 040. I have seen an easy 350 rwkw out of the walbro pump. I have big plans for the car and all the good stuff is going on straight up. So far i have turbo back exhaust, blitz twin plate clutch, blitz front mount, walbro fuel pump, and pod filter. assesing options on what i will be doing next. after market computer probably.

You have to take price in to consideration too, 044 costs around the $300 mark wjere as i bought my Walbro from a supplier on here for $150.

[dangerman4]

An 044 mounted in tank only makes as much power as an 040. I have seen an easy 350 rwkw out of the walbro pump. I have big plans for the car and all the good stuff is going on straight up. So far i have turbo back exhaust, blitz twin plate clutch, blitz front mount, walbro fuel pump, and pod filter. assesing options on what i will be doing next. after market computer probably.

You have to take price in to consideration too, 044 costs around the $300 mark wjere as i bought my Walbro from a supplier on here for $150.

i would like you to prove the above quote.

"i have seen an easy 350 kws from a walbro"

whoever told you this has been sniffing glue.....

why would you say a 044 will supply the same as a 040?

more glue?

you say you have big plans for the car so all the good stuff is going on straight up, yet you pick the cheapest fuel pump you can find.

you obviously havent learnt what happens when a engine runs lean...

sorry but your post above is highly inacurate..

and just to clarify im talking at the wheels kws not at the engine.

the walbro will not possibly keep up with the fuel demands of a highly tuned, high revving rb25det or similar, at a high rail pressure.

the walbro is a awesome pump for its price and up to 250 kws is all that you need as it will happily run at 50 - 55 psi and still flow enough fuel to keep up.

however

if you are serious about your engine lasting once you have spent $15000 on both bolt on and internal mods, why would you risk it running lean at 7500 rpm?

why have a $150 pump feeding $15000 worth of engine?

It will only live more then a week if you can keep a solid AFR of less then 12:1

and a walbro "WILL NOT DO THIS".

45psi base pressure plus 20 - 25 psi boost = between 65 and 70 psi of rail pressure.

with pressure this high the walbros 255lph will drop down to well below 200 lph

good bye engine...

thats my advice,

and its your engine!

Cheers

Darren

[Evil34]

Hey darren,

An 044 only makes its true horse power rating when mounted externally of the fuel tank and using a surge tank set up, when they are mounted in tank they only make as much as an 040. I may be miss informed but as i go along i will keep people infromed on how things go with the Walbro in the car, my car will be dynoed after all future modifications to make sure everything is up to scratch.

I guess time will tell if i have made the right decision and i will be the first to admit if i am wrong and have to change fuel pumps in the future, but for now i am happy with the decision i have made.

Thanks

Shaun

[dangerman4]

Hey darren,

An 044 only makes its true horse power rating when mounted externally of the fuel tank and using a surge tank set up, when they are mounted in tank they only make as much as an 040. I may be miss informed but as i go along i will keep people infromed on how things go with the Walbro in the car, my car will be dynoed after all future modifications to make sure everything is up to scratch.

I guess time will tell if i have made the right decision and i will be the first to admit if i am wrong and have to change fuel pumps in the future, but for now i am happy with the decision i have made.

Thanks

Shaun

no probs fella sorry for being a bit harsh,

until you have done the mods yourself, and then pushed them to there limits, i wouldnt type posts like the one in question as there are a lot of new people on here these days that dont search the forum enough to find the true potential of each given mod!

i would hate for a new skyline owner to read your post and rush out and purchase a walbro thinking that it will keep up with a 044. then blow there engine.

i am a big fan of the walbro pump for its cost and size it does a hell of a job. i made it to 270kws at the rears but the afr was real ugly and the 550 nismo injectors at around 90% duty cycle.

by changing to a properlly mounted 044 my fuel flow and pressure both increased to the point where now im at 300 kws and the injectors are only running at around 70%

i hope this helps and just be carefull once you get past 250 kws.

i now have a forged bottom end to prove it...

one last thing my 044 cost me $275 plus another $50 of fittings, filters, etc

my bottom end cost me lots more....

dont scimp on the things that keep your motor alive...

[Leeman]

Thanx Darren, guess i'll be sticking with the original plan with the 044. Cheers

[J_Red33]

Strongly recommend the 044.

Even if you mount it in tank & then find it's not working good enough, you can convert it to external mount like it's meant to be & it won't cost a lot more. Really it's not designed to work as an in-tank pump & probably is more prone to cavitation for this reason if not carefully set up.

My 2cents

[Evil34]

Thanks darren,

I will keep an eye on everything and as you said i will probably end up getting an 044 but for now i think the walbro will be exactly what i need because i have run out of money for mods firstly i would like to see how far i can go with the stansard turbo so injectors, computer and oil cooler are on the shopping list.

I will definetley keep my eye on AFR as things get serious, to make sure everything is coping with future mods. If you are at the criuse today would like to catch up with you.

Thanks for the advise

Shaun