260z & Twin 2'' S.u's In My C210

[passin ewe]

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.

[Ghostrider]

Give me an address and I have a fuel reg for carbies you can have for nothing. And nothing will beat an electric fuel pump for delivery pressure and flow rate.

[passin ewe]

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.

[passin ewe]

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.

[coupe72001]

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.

[passin ewe]

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?

[coupe72001]

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.

[passin ewe]

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.

[passin ewe]

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.

[IronmaskDR]

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.

[passin ewe]

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.

[IronmaskDR]

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.

[passin ewe]

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.

[coupe72001]

You may be all well and sorted already, but I finally got my car back and was able to take some pics of the carby set up for you.

Hope its of some use.

[passin ewe]

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.

[coupe72001]

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.