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119 Posts Member #: 772 Advanced Member new york |
25th Mar, 2007 at 12:00:28am
carb was overfueling at idle took it out clean it up and reset float height reinstalled carb same problem
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 2521 Posts Member #: 417 Post Whore Swindon |
25th Mar, 2007 at 05:19:45am
Fuel return pipe to the tank not big enougth or restricted somehow
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119 Posts Member #: 772 Advanced Member new york |
25th Mar, 2007 at 12:01:47pm
it's been running this return pipe for a year with with no problems will see if it's restricted
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Site Admin  15302 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
25th Mar, 2007 at 12:13:34pm
As a test try connecting a large bore piece of pipe to the regulator return to tank leg, then poke the other end through the fuel filler cap back to the tank, this will prove if it is your return line causing the problem or something else.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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1303 Posts Member #: 30 Post Whore Epsom, Surrey |
26th Mar, 2007 at 08:35:31am
whats wrong with 7psi? works fine with me. |
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
26th Mar, 2007 at 01:43:00pm
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=1456
On 26th of Mar, 2007 at 08:35am Turbo Shed said:
whats wrong with 7psi? works fine with me. All i know is, it's designed to work with 3-4psi normally - I don't know of any carbs that run more than this? Not saying it's wrong, just that - in this case - it could be another problem (reference the above link). On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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3596 Posts Member #: 655 Post Whore Northern Ireland |
26th Mar, 2007 at 07:13:59pm
I dont think I was able to run anything more than 5psi on mine. It may have been less.
9.85 @ 145mph
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
26th Mar, 2007 at 08:16:59pm
I have set mine in the past by adjusting it till the fuel stops getting past the float valve. A subsequent check showed the pressure to be between 7 and 8psi.
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. |
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 3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
26th Mar, 2007 at 08:24:41pm
We had a similar problem once and after a bit of head scratching we looked in the car only to see the wets sitting on the return pipe...Doh! http://www.twin-turbo.co.uk
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119 Posts Member #: 772 Advanced Member new york |
27th Mar, 2007 at 12:37:46am
ok yesterday i ran a 10mm line from regulator back into tank like Tom suggested and sure enough pressure
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3596 Posts Member #: 655 Post Whore Northern Ireland |
27th Mar, 2007 at 01:31:22am
Whats the purpose of the restrictor, and where exactly do you have it ? 9.85 @ 145mph
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119 Posts Member #: 772 Advanced Member new york |
27th Mar, 2007 at 02:19:21am
it's on the fuel line that goes from the regulator to carb before fuel filter
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Site Admin 15302 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
27th Mar, 2007 at 01:40:14pm
Yes, the restrictor should go in the high pressure line from the fuel pump to the regulator.
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
27th Mar, 2007 at 01:50:18pm
On 27th of Mar, 2007 at 01:31am stevieturbo said:
Whats the purpose of the restrictor, and where exactly do you have it ? It's in the above link steve - but basically it's to make sure that the flow potential of the return exceeeds the flow potential of the supply. On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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3596 Posts Member #: 655 Post Whore Northern Ireland |
27th Mar, 2007 at 06:51:26pm
Odd...I just ran an 8mm feed and return ( with 1/4" OD metal hose for the return in the actual tank.
9.85 @ 145mph
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9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
27th Mar, 2007 at 07:50:10pm
On 27th of Mar, 2007 at 06:51pm stevieturbo said:
Odd...I just ran an 8mm feed and return ( with 1/4" OD metal hose for the return in the actual tank. I never had FP issues. No restrictors at all. Same here, but some people have, and this has been a solution. I guess it's all down to different setups and Austin tolerances. 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. |
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3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
27th Mar, 2007 at 08:51:24pm
I think you have to look at the whole fuel system. Just quoting the hose/pipe diameter is not the full story. Every bend and join will have an effect on the flow of the pipe. That is probably why some people get away with small pipe than others. http://www.twin-turbo.co.uk
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3596 Posts Member #: 655 Post Whore Northern Ireland |
28th Mar, 2007 at 01:08:09am
I definately wouldnt replicate my fuel system today !!!!!!!! or reccomend anyone do exactly what i did...
9.85 @ 145mph
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 2514 Posts Member #: 1217 I like nice quiet girly Minis Cheltenham, Gloucestershire |
28th Mar, 2007 at 07:23:52am
Well that is one way to stop people smoking in your car!!!!! Every day is a school day ...........
On 27th of Sep, 2007 at 12:45pm Jimster said:
why do you you think I got a girlfriend with small hands? |
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 54 Posts Member #: 1425 Advanced Member Yorkshire Wolds |
28th Mar, 2007 at 09:36:08pm
Just to add another scenario here, I retained the standard mini fuel pipe from tank to carb, and installed an 8mm return. With an MPi tank I can adjust the fuel pressure at idle into the carb to less than 1psi, and screw it up to 45psi! (not that I would need that!) Whats more I am finding that when the fuel pressure is set at 1.5psi the Boost is stronger and the mini feels much more responsive without any pinking /detonation, very strange.. dont want to hijack the thread, but does anybody else run fuel pressure below 3psi on idle? If you do can you PM me with details. Edited by Roadrocket on 28th Mar, 2007. |
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 2645 Posts Member #: 1246 Post Whore Lowestoft, Suffolk. |
28th Mar, 2007 at 11:38:33pm
Im now very confused as to what is needed with regards to what is needed size wise of supply and return? Restrictor??
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54 Posts Member #: 1425 Advanced Member Yorkshire Wolds |
29th Mar, 2007 at 12:56:15pm
I was of the understanding that the the supply fuel line internal diameter needs to be smaller than the return. However say your run two 8mm dia lines, then a restriction needs to be placed in the supply fuel line near the regulator. I think there is a lot of this on FAQ do a search. |
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119 Posts Member #: 772 Advanced Member new york |
29th Mar, 2007 at 08:58:47pm
ok got around to removing th restrictor from after the regulator and placed it before the regulator the fuel psi dropped from 7 to 5.5 that's the lowest i can get it also my return line is teed into the fuel line before the fuel pump it's not returning back into the fuel tank |
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3596 Posts Member #: 655 Post Whore Northern Ireland |
29th Mar, 2007 at 10:03:40pm
On 29th of Mar, 2007 at 08:58pm TURBO ME said:
my return line is teed into the fuel line before the fuel pump it's not returning back into the fuel tank I had thought about doing that on my car, but was advised against it. Dont recall by who, or why. Its not the normal done thing....but I dont see too many reasons why it should be a problem ? Apart from possibly heating the fuel up too much, as its such a small volume getting recirculated a lot. 9.85 @ 145mph
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 2924 Posts Member #: 95 Post Whore liverpool-on-sea |
29th Mar, 2007 at 11:21:16pm
On 29th of Mar, 2007 at 08:58pm TURBO ME said:
ok got around to removing th restrictor from after the regulator and placed it before the regulator the fuel psi dropped from 7 to 5.5 that's the lowest i can get it also my return line is teed into the fuel line before the fuel pump it's not returning back into the fuel tank well youve proved its a return problem so cant you plumb a return in to your tank. no longer a series, but still 1.3 turbo.
On 28th Nov, 2008 Sprocket said:
Oh now that is a long shaft you have Carl. |
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