Jump to content
SAU Community

Recommended Posts

I've done a search and found a few answers, but not all. Apologies if these questions have already been answered but keep in mind that there were a lot more to begin with that I would have also asked if I didn't search :P

Ok, it seems the general consensus is that once you hit around 220rwkw, you'll need to upgrade your fuel pump, and possibly the regulator. I am looking at getting a Bosch 044 for this reason.

The most important question I need to ask is - What is the part number? The reason I ask is because I have a friend who *may* be able to get me wholesale prices, because his company deals with Bosch. But since it's mostly NOT for car stuff (mostly power tools and other electrics), he'll need a part number rather than just ordering a "Bosch 044 fuel pump".

My next question is would I also need to upgrade my regulator at the same time? If so, what should I be looking at getting, and roughly how much should I be spending? I don't care about brand names, as long as it does the job I'll be happy with a cheapie (but preferably new) item.

Oh, and lastly - are these things relatively easy to fit yourself? Do they bolt straight up or do they need an adaptor of sorts? Do I need to pull the fuel tank out to fit everything?

Link to comment
https://www.sau.com.au/forums/topic/12826-fuel-pump-and-regulator/
Share on other sites

Despite I have one, I have no idea what the part# is.

You shouldn't necessarily need to replace / upgrade the pressure reg.

email the boys at Zoom ([email protected]) and ask them which issue had the article about installing the upgraded pump - but its not a simple pull-one-out-put-one-in upgrade though.

Good Q's Jimmy coz im up to the same type of area with my mods.

203rwkw and im thinking that a Rising Rate Fuel Regulator ~$190 should help fix up my leaning out problem at top end on 12psi. Even if it doesn't it'll be needed anyway sometime throughout this year.

The Rising Rate Fuel Regulator needs to be tuned I believe ?

Lemme know if you get any prices Jimmy I might be in for a group buy :P

Ben, where are you getting the rising rate regulator from? Where does it actually go? At the tank or the fuel rail or somewhere in between?

Blind_Elk, I've emailed them and am waiting for a response. Off-hand do you know roughly what's involved? Like, do I have to cut a section out of the tank, make an adapter, drill new mounting holes, etc? How much would a performance shop charge to do all this for me? I'm pretty handy with a spanner, but working around fuel makes me nervous :P

Thanks for that info Browny, but after reading the thread I just have more questions :P

The 044 seems to be too big for my application, if the cheaper 984 can flow up to 600hp. Even 600hp is way beyond the scope of anything I want to do with the car in the near future, so should I be looking at getting the 984 instead and save myself $100?

Are all these pumps pretty much the same size and shape, or do some require more or less work to fit and get working properly?

Edit: 'nother question - Am I getting an internal or external pump here?

Originally posted by JimX

Ben, where are you getting the rising rate regulator from? Where does it actually go? At the tank or the fuel rail or somewhere in between?

I did a search on google i think for aussie websites and they seem to be around the $195-$215 price for a brand new unit. I have absolutely no idea where they go or anything like that

:bahaha:

I just got a response from the guys at Zoom, they told me the fuel pump article is in issue 36, and that it's no longer available :P Can someone that has that issue please scan the article for all us fuel pump upgraders? :P

Originally posted by JimX

I just got a response from the guys at Zoom, they told me the fuel pump article is in issue 36, and that it's no longer available :P Can someone that has that issue please scan the article for all us fuel pump upgraders? :P

I can only do it in 'hard-copy' ie fax the pages to you. Do you have a fax# (pm me if you do). (And it won't be until tomorrow.)

Hi guys, fuel pump info as we know it.

GTST pump is 135 litres per hour and supports 300 bhp at standard pressure

GTR pump is 190 litres per hour and supports 420 bhp at standard pressure

Bosch 910 pump is 200 litres per hour and supports 450 bhp at 73.5 PSI 0 580 254 910

Bosch 975 pump is 228 litres per hour and supports 500 bhp at 73.5 PSI 0 580 254 975

Bosch 984 pump is 228 litres per hour and supports 500 bhp at 73.5 PSI 0 580 254 984

Bosch 044 pump is 330 litres per hour and supports 730 bhp at 73.5 PSI 0 580 254 044

Bosch 040 pump is 235 litres per hour and supports 520 bhp at 73.5 PSI 0 580 254 040

We use one GTR pump mounted in tank up to 400 bhp and for engine over 600 bhp we use twin GTR pumps with a surge tank and a GTST lift pump in tank.

Hope that helps

Question regarding the wiring up of these pumps. As I understand it at present, the factory pump doesn't pump out at full capacity all the time, it waits until you open the throttle up before giving it a full earth. There's another thread here that talks about giving the factory pump a constant earth all the time to help with stalling problems at idle.

Should the bigger Bosch pumps be hooked up in the same way or should we hardwire them to a constant earth? I'm mostly concerned with burning the pump out too early by running it constantly at full capacity. But if that's what they were designed to do (unlike the factory pump it seems) then that's what I'll do ;)

Edit: Oh yeah, thanks Sydneykid! I didn't even notice you had the part numbers in there at first, it kind of blended in at the end :D

Btw, since the 984 is good for up to 500hp, I think I'll go with that because my turbo only flows up to 450hp anyway. Unless the bigger 044 allows the stock injectors to flow a little better? If so I'll spend the extra $100 now so I can delay or put off indefinitely my injector upgrade.

Sydneykid, help!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Cheers. Skyline is back on the menu, can’t get rid of it. It’s like a child you don’t want, or herpes 
    • I got back to Japan in January and was keen to get back on track as quickly as possible. Europe is god-awful for track accessibility (by comparison), so I picked up a first-gen GT86 in December just to have something I could jump into right away. The Skyline came over in a container this time and landed in early January. It was a bit battered after Europe, though—I refused to do anything beyond essential upkeep while it was over there. The clutch master cylinder gave out, and so did the power steering. I didn’t even bother changing the oil; it was the same stuff that went in just before I left Japan the first time. Naughty. Power steering parts would’ve cost double with shipping and taxes, so knowing I’d be heading back to Japan, I just postponed it and powered through the arm workout. It took a solid three months to get the car back on the road. Registration was a nightmare this time around. There were a bunch of BS fees to navigate, and sourcing parts was a headache. I needed stock seats for shaken, mistakenly blew 34k JPY on some ENR34 seats—which, of course, didn’t fit—then ended up having the car’s technical sheet amended to register it as a two-seater with the Brides. Then there’s the GT86. Amazing car. Does everything I want it to do. Parts are cheap, easy to find, and I don’t care what anyone says—it’s super rewarding to drive. I’ve done a few basic mods: diff ratio, coilovers, discs, pads, seat, etc. It already had a new exhaust manifold and the 180kph limiter removed, so I assume it’s running some kind of map. I’ve just been thrashing it at the track non-stop—mostly Fuji Speedway now, since I need something with higher speed after all that autobahn time. The wheels on the R34 always pissed me off—too big, and it was a nightmare getting tires to fit properly under the arches. So I threw in the towel and bought something that fits better. Looks way cleaner too (at least to me)—less hotboy, less attention-seeking. Still an R34, though. Now for future plans. There are a few things still outstanding with the car. First up, the rear subframe needs an overhaul—that’s priority one. Next, I need to figure out an engine rebuild plan. No timeline yet, but I want to keep it economical—not cutting corners, just not throwing tens of thousands at a mechanic I can barely communicate with. And finally, paint. Plus a bit of tidying up here and there.  
    • Nope, needed to clearance under the bar a little with a heat gun, a 1/2" extension as the "clearancer", and big hammer, I was aware of this from the onset, they fit a 2.0 with this intake no problems, but, the 2.5 is around 15mm taller than a 2.0, so "clearancing" was required  It "just" touched when test fitting, now, I have about 10mm of clearance  You cannot see where it was done, and so far, there's no contact when giving it the beans Happy days
    • It's been a while since I've updated this thread. The last year (and some) has been very hectic. In the second-half of 2024 I took the R34 on a trip through Germany, Italy, France and Switzerland - it was f*cking great. I got a little annoyed with the attention the car was getting around Europe and really didn't drive it that much. I could barely work on the car since I was living in an inner-city apartment (with underground parking). During the trip, the car lost power steering in France - split hose - and I ended up driving around 4,000kms with no power steering.  There were a few Nurburgring trips here and there, but in total the R34 amassed just shy of 7,000kms on European roads. Long story short, I broke up with the reason I was transferred to Europe for and requested to be moved back to Japan. The E90, loved it. It was a sunk cost of around EUR 10,000 and I sold it to a friend for EUR 1,500 just to get rid of it quickly. Trust me, moving countries f*cking sucks and I could not be bothered to be as methodical as I was the first time around.
×
×
  • Create New...