Jump to content
SAU Community

Recommended Posts

On a stock fuel/ecu/turbo setup will an aftermarket fuel pump give a power increase? I was going to leave it stock but my mate said a Walbro or Bosch pump will give a little more power, plus my pump is getting old now.

Is this the case? Or is it pointless with a near-stock setup?

Thanks

Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/
Share on other sites

More fuels is better that no fuel in that case i found that out. before i did a turbo upgrade I have a stock turbo and a bigger fuel pump and I got less horespw but I wasnt so lean i was richer then after my turbo I havent had a problem since I done few dyno runs and never has it beeen too lean

Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/#findComment-3488341
Share on other sites

Omar not bosch its gay n noisy .. hks or walbro or nismo or tomei

n u might see an improvement but doubt it with ur mods. your going to see more improvement with a safc piggy back (just got mine installed and man its quick) Id chase one first and get dyno'd and see how lean you are. if you get bogging and that sort of crap when your upping the boost than yes a fuel pump is a NEEDED upgraded.

A general rule is upping boost, up the fuel. screw injectors for ur car atm

Edited by DECIM8
Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/#findComment-3488376
Share on other sites

Omar not bosch its gay n noisy .. hks or walbro or nismo or tomei

n u might see an improvement but doubt it with ur mods. your going to see more improvement with a safc piggy back (just got mine installed and man its quick) Id chase one first and get dyno'd and see how lean you are. if you get bogging and that sort of crap when your upping the boost than yes a fuel pump is a NEEDED upgraded.

A general rule is upping boost, up the fuel. screw injectors for ur car atm

I have a bosch one ur rite there noisey thinking bout it now should have gone a nismo alot easier to install less time and effort and more flow

Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/#findComment-3488393
Share on other sites

Omar not bosch its gay n noisy .. hks or walbro or nismo or tomei

n u might see an improvement but doubt it with ur mods. your going to see more improvement with a safc piggy back (just got mine installed and man its quick) Id chase one first and get dyno'd and see how lean you are. if you get bogging and that sort of crap when your upping the boost than yes a fuel pump is a NEEDED upgraded.

A general rule is upping boost, up the fuel. screw injectors for ur car atm

Yeh was gonna come down Nat and check out the tune. So you reckon don't bother with a new pump (Nismo/Walbro sound good to me) until a piggyback job is done?

Sweet, an SAFC is on the cards then, after i repair my exhaust manifold hehe.

Looking forward to seeing how the 34 goes dude :)

Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/#findComment-3489209
Share on other sites

You will only "make" more power, if the current pump can not supply enough fuel... which is a fairly major issue in itself.

Fuel pumps are good insurance as stocker gts-t pumps really aren't that crash hot in anything than a factory application

Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/#findComment-3489254
Share on other sites

I went and got a dyno purely to see what power my car was making and the operator told me it was running lean.. so I'm glad I went and found that out!

Graph below was with 3" catback/intercooler... I've since replaced the fuel pump with a Tomei one. Getting a safc in soon and a tune!

The AFR isnt super lean I guess, but I'm sure it would only get worse!

hyperdrive_dyno0001.jpg

Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/#findComment-3490272
Share on other sites

Fuel pumps are good insurance as stocker gts-t pumps really aren't that crash hot in anything than a factory application

Point taken

Safc is poo i heard?

pfc ftw :rofl:

yeah fuel pump + reg works the magic in your fuelling system, id say is a must if you think for "increasing" any power

:ph34r:

Ok ok, safc would be the budget choice :wave:

reg f**ks fuel flow, stock factory flow that is.

Pointless unless maxing out injectors.

You'll eventually need a pump Omar its just a matter of time, hell if it fails Phil has one anyway lol

Yes, ur right i'll bite the pump...errr bullet...or whatever.

Phil has a stockie or aftermarket?

What pump did you get? And what about getting a regulator?

Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/#findComment-3490411
Share on other sites

I went and got a dyno purely to see what power my car was making and the operator told me it was running lean.. so I'm glad I went and found that out!

Graph below was with 3" catback/intercooler... I've since replaced the fuel pump with a Tomei one. Getting a safc in soon and a tune!

The AFR isnt super lean I guess, but I'm sure it would only get worse!

hyperdrive_dyno0001.jpg

your afr's should of been sitting around 12 or under. afr's hitting around the 14:1 under full throttle is asking for a new motor.

In other words, your car was running dangerously lean.

Link to comment
https://www.sau.com.au/forums/topic/194477-fuel-pump/#findComment-3490509
Share on other sites

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

    • 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.
    • I assume clearances were all a-okay?
×
×
  • Create New...