Jump to content
SAU Community

Recommended Posts

I have the motor in and carbies ready to go. The mechanical pump of my L24 fits into the 260 but will this supply enough fuel, or do i need a holly blue & regulator. Is anyone else running a 260 or280 and what fuel set up are you using? Please send info.

Link to comment
https://www.sau.com.au/forums/topic/199568-260z-twin-2-sus-in-my-c210/
Share on other sites

Thanks for the generous offer ghostrider, I'm in Mandurah. Ph 08 95818997. 6.30 pm is a good time to ring. Again thanks Rick. I have a suspicion we're not in the same state, could be a long drive for a p/gauge.

Hey mate. I am running twin SU's on an L26 and my Peirburg electronic fuel pump is maintaining a steady PSI right through the rev range. While I am having plenty of other problems, the fuel pump isn't one of them.

Have also seen good results with the Japanese Toiko pumps or even the stock electronic fuel pump from the 280zx. Good luck with it.

Hey mate. I am running twin SU's on an L26 and my Peirburg electronic fuel pump is maintaining a steady PSI right through the rev range. While I am having plenty of other problems, the fuel pump isn't one of them.

Have also seen good results with the Japanese Toiko pumps or even the stock electronic fuel pump from the 280zx. Good luck with it.

Hi coupe72001 and thanks for the reply.

Just a couple more questions. With your Peirburg pump are you using a regulator or is it naturally about 6 psi, I've read that's about the optimum pressure.

Also do you have the mechanical pump still in the mix of things. ie tank--filter--elec pump--mech pump --regulator, carbs.

Finally does the Peirburg make much noise and is it like a holly blue meaning it has to be lower than tank or does it suck fuel rather than gravity feed. Sorry for so many questions but this is the last piece of the puzzle and currently I'm stumped regarding what setup to use. Thanks Ricky. One more thing, are you using the fuel return line?

Ok...

1. I had a regulator, but my fuel guy threw it out! Said it was unneccessary - which has probably proven to be true as the fuel PSI holds steady.

2. My electric fuel pump seemed to suck well, but to be on the safe side I mounted it below the fuel tank at the back of the car, so it is "pushing" rather than "sucking".

3. It's noisy as all hell, which is good because I know when it's broken and I like noisy cars anyway.

4. I am using the same fuel line setup as the stock setup... I think.

5. I threw out the stock fuel pump. Steal a block-off plate to cover the hole from an injected car without power-steering... (maybe a 280zx or an r30???) or buy a nice billet chrome one from ebay America.

Hope that helps. I can post a few pics of my carby setup if you'd like.

For the record can anyone confirm how many PSI of fuel flow would be needed to feed twin 2' SU's. I thought it was only 3-4.

Ok...

1. I had a regulator, but my fuel guy threw it out! Said it was unneccessary - which has probably proven to be true as the fuel PSI holds steady.

2. My electric fuel pump seemed to suck well, but to be on the safe side I mounted it below the fuel tank at the back of the car, so it is "pushing" rather than "sucking".

3. It's noisy as all hell, which is good because I know when it's broken and I like noisy cars anyway.

4. I am using the same fuel line setup as the stock setup... I think.

5. I threw out the stock fuel pump. Steal a block-off plate to cover the hole from an injected car without power-steering... (maybe a 280zx or an r30???) or buy a nice billet chrome one from ebay America.

Hope that helps. I can post a few pics of my carby setup if you'd like.

For the record can anyone confirm how many PSI of fuel flow would be needed to feed twin 2' SU's. I thought it was only 3-4.

Ok...

1. I had a regulator, but my fuel guy threw it out! Said it was unneccessary - which has probably proven to be true as the fuel PSI holds steady.

2. My electric fuel pump seemed to suck well, but to be on the safe side I mounted it below the fuel tank at the back of the car, so it is "pushing" rather than "sucking".

3. It's noisy as all hell, which is good because I know when it's broken and I like noisy cars anyway.

4. I am using the same fuel line setup as the stock setup... I think.

ithought it was only 3-4.

I'd certainly like to see some pics if it ain't a problem, and you didn't mention wether or not your using the return line.

So if your not using a regulator your pump must be a low psi 3-4 pump, maybe I should look it up on the net. Again thanks Ric. I've tried to put pics on with thread but must be doin something wrong.

I've had SU's and Webbers on L series engines before and I've only ever used the standard mechanical pump which I have been told by numerous carby tuners is more than adequate and with no pressure reg required. Is a bit more farking around with a leccy one too.

Cheers, Vaughan.

I've had SU's and Webbers on L series engines before and I've only ever used the standard mechanical pump which I have been told by numerous carby tuners is more than adequate and with no pressure reg required. Is a bit more farking around with a leccy one too.

Cheers, Vaughan.

Vaughan I believe your right in what you say as I've just finished reading about an hours worth of threads, mostly American. It seems plenty of people are running just mechanicals.

The only issue I have now and hopefully someone can tell me is, i had to use my L24s or C210 78 skyline mechanical pump as the 260 one was removed. I've been reading my workshop manwell and the L24 mechanical pump, pumps around the 80 ltrs per hour.

What I need to know is, is this close to what the 240z mechanical pump can do.

Yeh rick all will be good, I have interchanged L4 and L6 pumps from all versions and as far as I am aware they are all one and the same. Good old nissan interchangability.

Sweeeet, I think this is now confirmed and I'll lay it to rest, but of course i'll let you know how it goes in practise . Thanks for the confirmation and all registered threads, your help is a... well a big help.

Cheers Rick.

  • 2 weeks later...

Thanks Coupe72001.How's it going now, do you get good performance out of it?Are your S.U.'s 1.75 or 2'' and are they H.S series. Do you run a return line to the tank? Sorry about so many questions, just interested as mine is still a while away from running.

On the dizzy thread I've asked what induction you use,that's been answered thanks. I've just had some parts sent from England for my S.U's, got them off ebay and it took 6 days for delivery.Pretty good i thought. Cheers Ricky.

Hey Rick,

They are 2 inch from a Rover (most likely) and they are now going like the clappers. I had a poke around and it doesn't look like I use my fuel return anymore! I had forgotten that I disconnected it way back when I first swapped the carbys. I don't know if they are HS series or not, but if you tell me what to look for Ill find out.

Good work getting the carby bits promptly from the UK. I am learning to love ebay UK and US for getting some of the hard-to-find parts.

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

    • OK, so again it has been a bit of a break but it was around researching what had been done since I didn't have access to Neil's records and not everything is obvious without pulling stuff apart. Happily the guy who assembled the engine had kept reasonable records, so we now know the final spec is: Bottom end: Standard block and crank Ross 86.5mm forgies, 9:1 compression Spool forged rods Standard main bolts Oil pump Spool billet gears in standard housing Aeroflow extended and baffled sump Head Freshly rebuilt standard head with new 80lb valve springs Mild porting/port match Head oil feed restrictor VCT disabled Tighe 805C reground cams (255 duration, 8.93 lift)  Adjustable cam gears on inlet/exhaust Standard head bolts, gasket not confirmed but assumed MLS External 555cc Nismo injectors Z32 AFM Bosch 023 Intank fuel pump Garret 2871 (factory housings and manifold) Hypertune FFP plenum with standard throttle   Time to book in a trip to Unigroup
    • I forgot about my shiny new plates!
    • Well, apparently they do fit, however this wont be a problem if not because the car will be stationary while i do the suspension work. I was just going to use the 16's to roll the old girl around if I needed to. I just need to get the E90 back on the road first. Yes! I'm a believer! 🙌 So, I contacted them because the site kinda sucks and I was really confused about what I'd need. They put together a package for me and because I was spraying all the seat surfaces and not doing spot fixes I decided not to send them a headrest to colour match, I just used their colour on file (and it was spot on).  I got some heavy duty cleaner, 1L of colour, a small bottle of dye hardener and a small bottle of the dye top coat. I also got a spray gun as I needed a larger nozzle than the gun I had and it was only $40 extra. From memory the total was ~$450 ish. Its not cheap but the result is awesome. They did add repair bits and pieces to the quote originally and the cost came down significantly when I said I didn't need any repair products. I did it over a weekend. The only issues I had were my own; I forgot to mix the hardener into the dye two coats but I had enough dye for 2 more coats with the hardener. I also just used up all the dye because why not and i rushed the last coat which gave me some runs. Thankfully the runs are under the headrests. The gun pattern wasn't great, very round and would have been better if it was a line. It made it a little tricky to get consistent coverage and I think having done the extra coats probably helped conceal any coverage issues. I contacted them again a few months later so I could get our X5 done (who the f**k thought white leather was a good idea for a family car?!) and they said they had some training to do in Sydney and I could get a reduced rate on the leather fix in the X5 if I let them demo their product on our car. So I agreed. When I took Bec in the E39 to pick it up, I showed them the job I'd done in my car and they were all (students included) really impressed. Note that they said the runs I created could be fixed easily at the time with a brush or an air compressor gun. So, now with the two cars done I can absolutely recommend Colourlock.  I'll take pics of both interiors and create a new thread.
    • Power is fed to the ECU when the ignition switch is switched to IGN, at terminal 58. That same wire also connects to the ECCS relay to provide both the coil power and the contact side. When the ECU sees power at 58 it switches 16 to earth, which pulls the ECCS relay on, which feeds main power into the ECU and also to a bunch of other things. None of this is directly involved in the fuel pump - it just has to happen first. The ECU will pull terminal 18 to earth when it wants the fuel pump to run. This allows the fuel pump relay to pull in, which switches power on into the rest of the fuel pump control equipment. The fuel pump control regulator is controlled from terminal 104 on the ECU and is switched high or low depending on whether the ECU thinks the pump needs to run high or low. (I don't know which way around that is, and it really doesn't matter right now). The fuel pump control reg is really just a resistor that controls how the power through the pump goes to earth. Either straight to earth, or via the resistor. This part doesn't matter much to us today. The power to the fuel pump relay comes from one of the switched wires from the IGN switch and fusebox that is not shown off to the left of this page. That power runs the fuel pump relay coil and a number of other engine peripherals. Those peripherals don't really matter. All that matters is that there should be power available at the relay when the key is in the right position. At least - I think it's switched. If it's not switched, then power will be there all the time. Either way, if you don't have power there when you need it (ie, key on) then it won't work. The input-output switching side of the relay gains its power from a line similar (but not the same as) the one that feeds the ECU. SO I presume that is switched. Again, if there is not power there when you need it, then you have to look upstream. And... the upshot of all that? There is no "ground" at the fuel pump relay. Where you say: and say that pin 1 Black/Pink is ground, that is not true. The ECU trigger is AF73, is black/pink, and is the "ground". When the ECU says it is. The Blue/White wire is the "constant" 12V to power the relay's coil. And when I say "constant", I mean it may well only be on when the key is on. As I said above. So, when the ECU says not to be running the pump (which is any time after about 3s of switching on, with no crank signal or engine speed yet), then you should see 12V at both 1 and 2. Because the 12V will be all the way up to the ECU terminal 18, waiting to be switched to ground. When the ECU switches the fuel pump on, then AF73 should go to ~0V, having been switched to ground and the voltage drop now occurring over the relay coil. 3 & 5 are easy. 5 is the other "constant" 12V, that may or may not be constant but will very much want to be there when the key is on. Same as above. 3 goes to the pump. There should never be 12V visible at 3 unless the relay is pulled in. As to where the immobiliser might have been spliced into all this.... It will either have to be on wire AF70 or AF71, whichever is most accessible near the alarm. Given that all those wires run from the engine bay fusebox or the ECU, via the driver's area to the rear of the car, it could really be either. AF70 will be the same colour from the appropriate fuse all the way to the pump. If it has been cut and is dangling, you should be able to see that  in that area somewhere. Same with AF71.   You really should be able to force the pump to run. Just jump 12V onto AF72 and it should go. That will prove that the pump itself is willing to go along with you when you sort out the upstream. You really should be able to force the fuel pump relay on. Just short AF73 to earth when the key is on. If the pump runs, then the relay is fine, and all the power up to both inputs on the relay is fine. If it doesn't run (and given that you checked the relay itself actually works) then one or both of AF70 and AF71 are not bringing power to the game.
    • @PranK can you elaborate further on the Colorlock Dye? The website has a lot of options. I'm sure you've done all the research. I have old genuine leather seats that I have bought various refurbing creams and such, but never a dye. Any info on how long it lasts? Does it wash out? Is it a hassle? What product do I actually need? Am I just buying this kit and following the steps the page advises or something else? https://www.colourlockaustralia.com.au/colourlock-leather-repair-kit-dye.html
×
×
  • Create New...