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Home > Help Needed / General Tech Chat > 998 Turbo fueling problem

minimadcitye

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4 Posts
Member #: 6441
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Bangor Northern Ireland

19th Jul, 2009 at 04:01:58pm

Hi Ive just built a turbo 998 mini. Got it running however!!
I have an electric fuel pump on it. When this is turned on it is forcing to much fuel through the carb and it keeps flooding. i have the fuel regulator fully open.
I put a switch on the fuel pump so i can turn it off once i have primmed the carb and then it runs fine. Any suggestions what needs adjusted?
Many Thanks

apbellamy

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16540 Posts
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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

19th Jul, 2009 at 04:07:37pm

Sounds like you've got too much fuel getting to your carb.

Your regulator needs to be set at about 3.5-4 psi. Also, make sure your return pipe to the tank is big enough. 8mm ID pipe as a minimum.

Use the search button at the top, it's been covered many times *smiley*

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*

minimadcitye

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4 Posts
Member #: 6441
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Bangor Northern Ireland

19th Jul, 2009 at 04:18:57pm

The regulator is fully open and i use 8mm pipe and ive even tried taking the pipe from the regulator return and putting it into a bucket so its only a foot long

apbellamy

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16540 Posts
Member #: 4241
King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

19th Jul, 2009 at 05:38:15pm

Having the regulator fully open will give you way too much fuel preasure! You need ot get a preasure gauge and set it correctly. Have a look in the How To section, there's a guide in there somewhere.

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*

Ben H

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3329 Posts
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Melton Mowbray, Pie Country

19th Jul, 2009 at 07:02:59pm

Have you checked the needle valve in the carb. Even 3psi will pass a knackered one.

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

wil_h

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Betwix Harrogate and York

19th Jul, 2009 at 07:32:42pm

Two obvious things to check then.

1) the regulator, not uncommon to be buse

2) the needle valve in the carb.

What is the carb by the way, metro turbo?

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
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

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


minimadcitye

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4 Posts
Member #: 6441
Junior Member

Bangor Northern Ireland

19th Jul, 2009 at 08:56:06pm

Yeah its a metro turbo carb. Will maybe take a look at the needle valve. Anyone know if these are the same as an N/A carb as i have a spare one sitting.


evolotion

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Glasgow, Scotland

19th Jul, 2009 at 09:02:03pm

is the regulator a metro turbo one or an aftermarket one for a fuel injection car?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

minimadcitye

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4 Posts
Member #: 6441
Junior Member

Bangor Northern Ireland

19th Jul, 2009 at 09:06:04pm

its a regular metro turbo one

wil_h

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9258 Posts
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Betwix Harrogate and York

19th Jul, 2009 at 09:17:39pm

You seem to have all the rights bits then. If you could measure the fuel pressure at the carb, then you'd know if it was the needle valve or reg.

However, if you have a needle valve, then try that, they are the same.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
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

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Mr Joshua

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Member #: 1954
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Luton Bedfordshire

20th Jul, 2009 at 09:55:56am

Hd this happe nt o mine check the needle valve. Mine had some small gel like deposites on it From the residual ful that had been sat in it from the previous year.

Own the day

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