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Home > Technical Chat > Suck through turbo fuel pump needs

Vegard

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I pick holes in everything..

Chief ancient post excavator

Norway

30th Apr, 2008 at 08:18:13pm

At a guess, the mechanical fuel pump is not up to the job.
I've found two pumps in Norway for sale, what do I need?

1100 +40 MG camshaft, will be running 7-9psi

The ones in question are:

1. Maks. kap. 70 l/h. Maks. trykk 0,27–0,40 bar.

2. Maks. kap. 120 l/h Maks. trykk 0,10 bar.

I guess you can figure out the Norwegian *wink*

So, which one do I buy.. Tomorrow *wink*

BTW: What is really the difference from a "pressure" pump, to a "suction" pump. I mean some are mounted in the tank area, some are fitted under the bonnet.

No Carl, I'm not having another discussion about penis-pumps.

Edited by Vegard on 30th Apr, 2008.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

wil_h

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Betwix Harrogate and York

30th Apr, 2008 at 08:42:09pm

Deffo number 1.

70 l/hour should be more than enough, and the psi seems more suitable. 0.1 bar is piss all.

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the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

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I'm mainly concerned about swirl in the runners caused by the tangential entry.


Bat

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Bermingum

30th Apr, 2008 at 10:15:20pm

Hi,
A suction pump is more suction biased, meaning it can be in the engine bay, whereas the pressure pump needs to be near the tank. Pressure pump is better as less chance of fuel starvation on acceleration *wink*
Cheers,
Gavin :)

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Vegard

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7765 Posts
Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

1st May, 2008 at 03:56:30am




On 30th Apr, 2008 Bat said:
Hi,
A suction pump is more suction biased, meaning it can be in the engine bay, whereas the pressure pump needs to be near the tank.


That I've figured, but what's the difference?

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

miniminor63

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The oversills police

Oslo, Norway

1st May, 2008 at 08:14:41am

how are you going to be able to buy anything today Veg?

Vegard

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7765 Posts
Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

1st May, 2008 at 10:14:34am

Fucking communists!

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

stevieturbo

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Northern Ireland

1st May, 2008 at 05:25:53pm

A typical efi pump does not suck.

So if you mounted it higher than the level of fuel in the tank, then it would never prime.

A typical low pressure carb pump, would.

All you need is good low, and a needle valve that will allow enough fuel into the carb.

Why not just slap an efi pump onto it, same as a blow thru setup ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Vegard

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Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

1st May, 2008 at 09:31:03pm

Because that would give me way too much fuel.

Still don't understand the difference between these two pumps. The look identical, cost the same etc.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

stevieturbo

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Northern Ireland

1st May, 2008 at 11:28:03pm

Internals are obviously different. I have opened up an efi pump, but not the others.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Vegard

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7765 Posts
Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

2nd May, 2008 at 07:59:17am




On 1st May, 2008 stevieturbo said:
Internals are obviously different. I have opened up an efi pump, but not the others.


Exactly. I need to do some dissection.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

Vegard

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7765 Posts
Member #: 74
I pick holes in everything..

Chief ancient post excavator

Norway

2nd May, 2008 at 11:16:58pm

Answer from a fuel pump manufacturer:

The difference is that this type is a sucking one, the spring inside is not that strong as compared to the other pumps, thus resulting in a lower forwarding pressure of about 0,15 bar, but with more electric force on the sucking side.

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

Bat

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Bermingum

3rd May, 2008 at 12:00:39am

Hi,
There you go then, it's officially one hell of a sucker! lol
Cheers,
Gavin :)

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