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Home > Help Needed / General Tech Chat > mini turbo dies on boost

4xturbo

5 Posts
Member #: 10437
Junior Member

15th May, 2013 at 12:47:40pm

hi all I'm really stuck now,
I bought my old mini turbo back last month as a bit of a wreck, it did still run but would die as soon as it came on boost. So far I have rebuilt the carb, replaced regulator,and pump set the regulator at 4psi and it does raise on positive pressure replaced plugs and checked timing. I'm getting to the point where I want to rip the engine out and fit honda engine unless any of you guys can think of anything I've mist.

Carlzilla

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Quarry Bonk

15th May, 2013 at 01:10:04pm

Any vac pipes etc broken or split?

On 26th Jan, 2012 Tom Fenton said:
ring problems are down to wear or abuse but although annoying it isn't a show stopper

On 5th Aug, 2014 madmk1 said:
Shit the bed! I had snapped the end of my shaft off!!

17.213 @ 71mph, 64bhp n/a (Old Engine)

wil_h

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Betwix Harrogate and York

15th May, 2013 at 01:10:06pm

Check the lean off pipe for splits.

Check someone hasn't removed the restrictor in the plenum.

Check that the gasket between the plenum and carb has the hole in it to pressurise the float bowl.

Search 't piece trick' on here.

Some starters anyway.

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.


4xturbo

5 Posts
Member #: 10437
Junior Member

15th May, 2013 at 01:27:37pm

I've also done a compression test and all4 pots came in at 12 Bar, all fuel pipes are new as are boost/vacuum pipes.
if you disconnect the plenum pipe so it runs N/A it runs and drives fine. The balance pipes on the carb are blocked off leaving only the fuel in pipe. gaskets are facing the right way too ie hole for fuel pressure in the right place.


Kean

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2406 Posts
Member #: 341
aka T2clubby

South Staffs

15th May, 2013 at 04:40:31pm

Time to try the T piece trick then

4xturbo

5 Posts
Member #: 10437
Junior Member

15th May, 2013 at 05:25:34pm

I can't seem to find any info on the T piece trick, who's going to tell me about it??

paul wiginton
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9 times Avon Park Class C winner

Milton Keynes

15th May, 2013 at 05:31:47pm

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=2103

I seriously doubt it!

4xturbo

5 Posts
Member #: 10437
Junior Member

15th May, 2013 at 06:49:13pm

thanks for your help guys
cheers for the link Paul
Oh and the T piece trick did the job but I am kicking my self for not figuring that out myself.
think the neighbours are going to get p**sed off with me now.

Kean

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2406 Posts
Member #: 341
aka T2clubby

South Staffs

15th May, 2013 at 06:51:00pm

Glad you sorted it mate, welcome to TM

4xturbo

5 Posts
Member #: 10437
Junior Member

15th May, 2013 at 06:55:19pm

cheers Kean

Edited by 4xturbo on 15th May, 2013.

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