Mounting A bosch 044 fuel pump intank?

[Brody]

Mines intank?

[jvs007]

dudes, while the topic of fuel pumps is up, does any1 have info on the rising rate fuel regulators?? whats it for and why???

[Steve]

Normal fuel pressure reg - sets fuel pressure (say 40psi) above plenum pressure.

Adjustable allows you to adjust the amount above plenum pressure (so you can dial in more than stock pressure)

Rising rate, increases the fuel pressure the more boost pressure is detected. So instead of having say 40psi (above plenum pressure) at 1 bar, it may have 55psi above plenum pressure, at 2 bar it may have 80psi and so on. (these figures are all arbitary and used purely for demonstration)

Either an adjustable or rising rate fuel pressure regulator is used to stretch injectors beyond their nominal rating. Ok for small amounts, causes trouble when you go too far - better off using larger injectors if you are going for major increases in power and therefore fuel delivery requirements.

[markr34gtr]

just fiited a nismo 280lt in tank pump to my r34 gtr...

fits straight in , no mods needed....comes with fuel tank

rubber ring also....

i think why muck around cutting things when you can sell your old gtr pump for 300 bucks and the nismo one

was 500 bucks...

saves running all over the place getting clamps and fittings and 1/2 day...

might be a different story for the gtst guys upgrading pumps.....

cheers.

[Cubes]

It all comes down to reliability also.

If the Bosch pumps are apparently unreliable then what is another couple hundred dollars to save your engine leaning out and going pop a year or two later IF the bosch pump fails.

I think its a bit of gossip anyhow.

[Sydneykid]

Hi guys, I have seen no evidence that shows a Nismo fuel pump is more reliable than a Bosch. So spending $200 more for a lower capacity pump, just because it has a Nismo sticker on it, is a waste of money, in my ever humble opinion.

If you are truly concernend with fuel pump reliability (rather than just having a name brand part on your car), then fittting a pressure switch in the fuel line connected up to a dashboard warming light is a far more effective method. And costs about 1/10th as much.

After all there is more than just the fuel pump involved, what if the fuel filter is blocked, having a Nismo pump is no help, but a low fuel pressure warning light sure is. What about damaged fuel lines? Blocked pick up? Faulty fuel pressure regulator? Boiled fuel? etc etc

BTW markr34gtr ,who did you get to pay $300 for a used GTR pump? I pick them up for $150 regularly, as they make a good upgrade for a road/sometimes track GTST. Sometimes we use a pair in parrallel, after the surge tank, on higher powered circuit cars using a standard GTST pump as the lifter.

Hope that helps

[markr34gtr]

no worries sydney kid.

i just didnt also like the idea of having to modify parts to fit a expensive car...

i'd prob say the same as you if i had done a few mods to fit bosch pumps to the nissan in tank brackets but unless you have all the correct fittings and clamps,wiring

terminals etc to do the job you can easily waste a good 1/2 stuffing around...

any how i was going to get a bosch 044 also but just didnt want to mod my pump bracket etc etc....

maybe i am just a bit lazy.. ha ha..

[Anquetil]

JNR24, I wrote up a detailed description on this a few months ago, do a search:)

Steve, can you point me towards this thread, I can't find it?

[grepin]

Had this problem with mine as low as a 1/4 of a tank especially on the track. I believe I have fixed the problem (havent been back to the track) by moving the pickup 90deg to the left. Looking in the tank there is two sections seperated by a small rib. I think standard the pickup goes straight down and into a well to the right. Here I would get fuel surge. I moved the pickup left 90deg to the other side of the rib to the larger area of the tank. Theoretically I would have thought the smaller area would have acted like a surge tank. I tested it on the sharpest corner I could find on empty with no surge. Previously I could get it to surge every time.

Yes mine is noisy after having being worked hard. Idealy you should keep a quater tank of fuel to cover the pump for cooling.

Hope this helps. Not making any promises.

Let me know how you get on.