Jump to content
SAU Community

Recommended Posts

Today I had a Bosch 040 supplied + fitted for $340.

Previously with the std pump 7psi (190rwkw) drove absolutely perfectly but 12psi (203rwkw whilst leaning out) was coughing and spluttering.

Now 12psi is as good as 7psi after the new 040 pump has been fitted.

Very happy because the 040 will leave me with plenty of headroom for future mods.

Originally posted by benm

Theirs no way i'll be turning it up to 15psi, 12psi is enough for me right now (I need to burn that in as it is).

Having a standard ECU means lot of things can go wrong. :D

Such as? The stock ecu throws more fuel in and less advanced timing, if anything its going to protect the engine. Granted it has a boost/fuel cut which spoils fun, but it certainly isnt going to harm the engine in any way.

would the standard pump running into a surge tank with larger fuel pump be enough? or would you need 2 pumps of same flow rate for this to work best??

anyone put a surge tank in the boot of a skyline, or are the fuel tanks baffled enough not to worry about starvation on the track??

craved, I don't know about the inner design of the tank, but I've never had a fuel starvation problem on the track (but then neither do I take it out with under 1/4 tank)

yeah neither have i, well not that i've noticed anyway, just looking for an easier way than replcing the one intank, plus the looks etc of an anodised surge tank in the boot :P

do you know if it would work or would the high pressure pump empty it too quick to be feasable?

Craved I got my Bosch 040 (520hp) intank fuel pump supplied + fitted for $340.

To get an external pump/surge tank etc supplied + fitted by UAS was going to cost basically $1,000.

Unless you drive around with your boot open I reckon the ~$600 could be spent elsewhere, like some slotted front rotors.

damn, a grand!!!

they sell the surge tanks for about $250, plus the fuel pump, the rest can be done yourself!!!

but overall just looking at whether its going to work the way i was thinking, main reason is that i have to do this setup in a sprinter as well, since the engine conversion it has major surge issues running from the VL turbo pump!! The old AE86 dont have fuel tank baffles, causing major issue at the track when less than half a tank!!

Hi guys, by plumbing it into a surge tank you take the load (resistance) off the standard GTST pump. As an example we have a GTR that uses a GTST pump in the tank pumping into a 1.5 litre surge tank with 2 X GTR pumps feeding the engine. The surge tank is never empty, the single GTST pump easily keeps up with the requirements of the 2 X GTR pumps supplying the 6 X 1,000 cc injectors.

Hope that helps

that was exactly the answer i was looking for sydneykid!!!

thanks heaps for that!!!

just one more little question: do you just Y piece the return line and the surgetank overflow before the fuel tank, or do you need a separate lines to the tank from the surgetank and return line ??

Cheers

Hi Craved, I do it a little differently than some I have seen. I return the unused fuel from the engine into the fuel tank, not into the surge tank. I have found it comes back from the engine warmer than when it went there. The compression effect of the fuel pumps, the heat transferred from the fuel pumps and the heat in the engine bay all get together to make it hotter. So if you keep going around and back into the surge tank you end up with really hot fuel which is not a good thing.

So I use a Y piece at the fuel tank for the surge tank over flow and return from the fuel rail.

Hope that helps

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

    • Maybe they'll look to do a bunch of presales to help inject some cash fast for their financial issues...
    • Does it also misfire equally when revving?   Josh is very correct in what you should do. The coilpack harness wiring loom itself is a known problem due to its age and the number of heat cycles it has gone through. Throwing parts at a vehicle to diagnose the issue isn't a smart or good way to do it. Secondly, you may have a bad coil pack, you pop replacements in, they fix that issue, but messing with the harness breaks it, so the issue persists. So now you think "well it wasn't the coil packs" and have to continue chasing your tail, potentially swapping back in your shit coil packs and returning the good ones (yes, I've seen people do this because 'it wasn't the problem' and they want to save money). And suddenly, you've got two issues with the same symptoms...   Diagnose, don't use the spare parts shotgun.
    • Well the articals keep saying a Q50s (Skyline in Japan) with a new Manual gearbox. I like the talk about the new looks with the round tail lights. I hope they bring back the retro look like they did with the Z
    • Off the back of feedback we have decided to mix up this next Motorkhana at Avalon to have some targeted skills practice for beginners to advanced. Saturday 6th September 2025 8:30am Capped 26 entries Standard Entry Fee: $89 Members Entry Fee: $55 (SAU Victoria Only) Entries Close: Friday 5th February  Where: 55 beach road Avalon. https://maps.app.goo.gl/HNUE3EuNue3sJxh38 Entries: Limited to 26 entrants (Passengers allowed over the age of 14 with a signed disclaimer and same safety gear) Disclaimer: Download  Please electronically sign and email to [email protected] or print and hand in and Driver Sign In. To compete in this event you will require A valid  AASA General Speed licence or (Day license via the AASA Website for $50) MA Licenses are no longer accepted by AASA https://aasa.com.au/  A helmet, long sleeve clothing and a 1KG mounted fire extinguisher recommended (But not Mandatory). Further details within Supp Regs on the enty link. Entry Link > https://www.sauvic.com.au/entry/deca/20250906 You can bring and have a passenger in the car but they need to comply to the same safety and clothing as driver. Bring your car and get to battle others, win, lose or draw. I can guarantee you will have lots of fun. Any questions email [email protected] Entry List: 1.Anna S 2. Luke S 3. Jesse Givens-Lamb 4. Luca Stamatescu 5. Madeleine Stamatescu    
    • Wanna rewrite all of that in, say, 2 or 3 separate sentences, so that we can read it?
×
×
  • Create New...