[Mini] fueling issues after converting to EFI solved

[Frits Schouten]

Good point about having the facet pump to feed the EFI pump directly but
there is no way the facet pump can keep up with the EFI pump.
The Facet pump is good for about 120L/h while the EFI pump does 250L/h.
That's also why the return from the fuel rail goes back in the surge tank.
Now there's an idea. A Supercharger :-) or just drive to what the engine
likes most...(4000rpm+)
Btw, when I keep the revs below 5400rpm nobody would even know there is a
different engine under the bonnet, ha, ha.

Cheers,
Frits.

-----Original Message-----
From: anne at mibv.com [mailto:anne at mibv.com] On Behalf Of Anne
Sent: 15 August 2014 10:40
To: Frits Schouten
Cc: Mini-List
Subject: Re: [Mini] fueling issues after converting to EFI solved

Hi Frits,

What I was wondering most about is why not just put the facet pump
between the tank and the EFI pump.
Possibly with a King filter thingy in between to set a specific pressure.

I gather the facet is between the big tank and the self buitl surge
tank and the EFI is sucking from the surge tank, which the facet pump
makes sure is always full.
So basically you've built your own Filter King thingy :)

BTW, had a look at your building the beast page: quite impressive!
http://simple-pages.homeunix.net/mini/EngineUpgrade/
Now go and throw a supercharger on there for those low revs :)

Anne.

On Thu, Aug 14, 2014 at 9:28 PM, Frits Schouten <fritss at ps.gen.nz> wrote:
> Hi Anne,
> The main reason is that the EFI pump is not very good at sucking. The feed
> pipe in the Mini tank is only 6mm id and as a result of that the EFI pump
> was cavitating on low tank levels. In the process I've already lost one
EFI
> pump.
> So, with the surge tank there is a constant head to the EFI pump and I can
> now feed the pump with 12mm id fuel line, as per specs of the EFI fuel
pump.
>
> Just last night the job was finished and I drove the Mini for quite some
> distance with no noise from the fuel pump and no more issues with
> accelerating.
>
> Cheers,
> Frits.
>
>
> -----Original Message-----
> From: Anne Krijger [mailto:anne at mibv.com]
> Sent: 15 August 2014 02:19
> To: Frits Schouten
> Subject: Re: [Mini] fueling issues after converting to EFI solved
>
> Hi Frits,
>
> http://simple-pages.homeunix.net/mini/Minizuki/surgetank.jpg
> results in a 404?
>
> I saw the attachment in the mail send directly to me, but it got
> stripped of the list mail.
>
> Not clear what the point of the surge tank is yet...
>
> Anne.
>
> On Thu, Aug 14, 2014 at 10:32 AM, Frits Schouten <fritss at ps.gen.nz> wrote:
>> I forgot the link to the photo of the surge tank...
>> http://simple-pages.homeunix.net/mini/Minizuki/surgetank.jpg
>>
>>
>> -----Original Message-----
>> From: Mini-list [mailto:mini-list-bounces at autox.team.net] On Behalf Of
> Frits
>> Schouten
>> Sent: 14 August 2014 19:35
>> To: Anne; Mini-List; Minilist (yahoo)
>> Subject: [Mini] fueling issues after converting to EFI solved
>>
>> Hello all,
>>
>>
>>
>> After some time in storage it was time to get the Mini out on the road
>> again.
>>
>> Remember that I've swapped the A+ engine with a Suzuki GTI engine. Ex
race
>> car engine, DOC, 16 valves, 5 speed box, etc, etc. NICE.
>>
>> http://simple-pages.homeunix.net/mini/EngineUpgrade/
>>
>>
>>
>> Now the feed pipe size out of the Mini tank is insufficient to feed an
EFI
>> pump, which is not very good at sucking fuel and in particular at the
> lower
>> tank levels.
>>
>> I've now made a surge tank out of 75mm exhaust tube with 8mm hose tails
on
>> the top and one 12mm hose tail on the bottom.
>>
>>
>>
>> A facet pump is used to fill the surge tank, a new return is welded at
the
>> top of the fuel tank to take the overflow from the surge tank, and the
>> return from the engine goes back into the surge tank.
>>
>> See attached photo.
>>
>> Problem solved.
>>
>>
>>
>> Cheers,
>>
>> Frits Schouten
>>
>> New Zealand.
>>
>> [demime 1.01d removed an attachment of type image/jpeg which had a name
of
>> IMG_1210072.JPG]
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