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Home > Help Needed / General Tech Chat > carb upgrades

t3gav

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Gavin@minispares.com

kent

hello, apart from a full rebuild what else would you recommend i do to my carb, upgraded dash pot spring? bi metallic strip thingy? thanks


turbodave16v
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SouthPark, Colorado

Bi met thingy,
Block off the bypass hose,
Change throttle disc for solid one
Green (i recall) spring

And don't forget the annodised dashpot cover for maximus blingus!

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



nogin

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508 Posts
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Post Whore

westbury, wiltshire

what does blocking off the by pass hose do, which one is the by pass hose, is it the one which would be a fuel over flow on n/a carb

"Can I legally marry people now that I am ordained in the Church of the SubGenius?" aka i know jack sh"t

i also make things

i love coming home to chrome


t3gav

2395 Posts
Member #: 229
Gavin@minispares.com

kent

whats the original throttle disc like? already on the dashpot cover should add around 50bhp lol


Turbo Phil

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4633 Posts
Member #: 20
My sister is so fit I won't show anyone her picture

Lake District

On 19/01/2006 23:07:59 gav said:

whats the original throttle disc like? already on the dashpot cover should add around 50bhp lol


The standard one has a little spring "poppet" thing fitted, replace with a solid disc as Dave suggested. *smiley*

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TURBO ME

119 Posts
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Advanced Member

new york

where can you get this solid disc?
block off bypass valve isn't that where you connect for dave's T piece trick?


turbodave16v
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10980 Posts
Member #: 17
***16***

SouthPark, Colorado

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=2785
http://www.turbominis.co.uk/forums/index.php?p=vt&tid=2878

I easilly found the above posts with a little-known trick. If you click HERE something very magical and special happens...

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



Nic

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9326 Posts
Member #: 59
First mini turbo to get in the 12's & site perv

Herefordshire

why is a solid butterfly needed? ive been running the std type with the poppet valve in my car


Tom Fenton
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

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TM legend.

Rotherham South Yorkshire

Its not strictly needed, but think about the percentage cross sectional area the poppet occupies at full throttle opening, and the disruption to flow.......


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


Nic

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9326 Posts
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First mini turbo to get in the 12's & site perv

Herefordshire

i was thinking that might of been the reason and thats why it was going to go for this year


Tom Fenton
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15300 Posts
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

&

TM legend.

Rotherham South Yorkshire

Yup bin it, solid butterfly comes with the carb rebuild kits.


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


turbodave16v
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10980 Posts
Member #: 17
***16***

SouthPark, Colorado

It also leads to a sluggish dump/blow-off valve operation in many cases. You'll probably find your DV sounds a lot different if you change it...

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



t3gav

2395 Posts
Member #: 229
Gavin@minispares.com

kent

ah thanks and yep the dv did sound a bit crap.


t3gav

2395 Posts
Member #: 229
Gavin@minispares.com

kent

sorry anyone know what the hi-flow needle valve on avonbars website is needed for, or does this also come in the rebuild kit?


turbodave16v
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10980 Posts
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SouthPark, Colorado

Speak to Avonbar. They have several needles...

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



Turbo Phil

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4633 Posts
Member #: 20
My sister is so fit I won't show anyone her picture

Lake District

On 22/01/2006 12:20:57 gav said:

sorry anyone know what the hi-flow needle valve on avonbars website is needed for, or does this also come in the rebuild kit?


A standard needle valve comes with the Burlen rebuild kit.
The Avonbar item may be a modified needle valve orafice ?
I was advised when having fuelling probs to drill the float bowl needle valve orafice to 2.9 mm to improve flow. This was a trick suggested by Avonbar. Perhaps it's this they're selling.

Phil. *smiley*

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