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coopdog

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330 Posts
Member #: 9628
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i know it should be around 14.7 at idle

but what should i be looking for before it starts causing damage?


Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

14.7 at idle,

about 12-12.5 under power, you dont want any less than about 13 really,

at cruise, aim for around 17

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



coopdog

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330 Posts
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nice and straight to the point :L

thanks mate


D4VE

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lowestoft suffolk

On full chat mine sometimes can flick down to 11 is that a no no? (P.s i havent driven the mini for over a month now so i think i mean 11)

On 24th Oct, 2015 jonny f said:
Nothing gets past Dave lol

NOTHING GETS PAST ME!! *tongue*

1/4 mile 14.7 @ 96mph 12psi boost
Showdown class A 2nd place 18.6 @ 69mph


Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

yeah 11 is ok, and safe, but you can get to a point where you start compromising bore lubrication, dunno how far you have to go for that though.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Brett

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9502 Posts
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Doncaster, South Yorkshire

Most older turbo jap stuff is mapped to run 10afr on full boost leaning this out to 12afr does pull some decent power gains on its own or stuffing more boost in and keeping same fueling

Yes i moved to the darkside *happy*

Instagram @jdm_brett


D4VE

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lowestoft suffolk

Thanks joe, the guy who built it and set it up said he'd rather it lil rich than weak, 11 has only been seen when foot is to floor and its at the point of pop or poop myself lol

On 24th Oct, 2015 jonny f said:
Nothing gets past Dave lol

NOTHING GETS PAST ME!! *tongue*

1/4 mile 14.7 @ 96mph 12psi boost
Showdown class A 2nd place 18.6 @ 69mph


coopdog

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330 Posts
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Senior Member

so lower the number the leaner it is?


Brett

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Doncaster, South Yorkshire




On 10th Jul, 2014 coopdog said:
so lower the number the leaner it is?

No low = rich

Yes i moved to the darkside *happy*

Instagram @jdm_brett


D4VE

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lowestoft suffolk

Was waiting for someone to answer first to make sure lol lower = rich

On 24th Oct, 2015 jonny f said:
Nothing gets past Dave lol

NOTHING GETS PAST ME!! *tongue*

1/4 mile 14.7 @ 96mph 12psi boost
Showdown class A 2nd place 18.6 @ 69mph


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

yep AFR is air to fuel by weight,

so 17:1 is 17 parts air to 1 part fuel
and 10:1 is 10 parts air to 1 part fuel

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Sean1

68 Posts
Member #: 10798
Advanced Member

Milton Keynes

running at 17 is far too lean for my liking 14.7 is perfect afr it will go down with your right foot lol


Brett

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Doncaster, South Yorkshire




On 10th Jul, 2014 Sean1 said:
running at 17 is far too lean for my liking

maybe for your liking but if the engine will cruise at that and temps stay in check and there is no det that this is perfect for good fuel economy
mine wouldnt go quite that lean without a steady misfire but 15.5 - 16afr at a steady 60mph it was more than happy at




On 10th Jul, 2014 Sean1 said:
14.7 is perfectl


technically yes but its not the best afr for max power or peak torque in either N/A or turbo so it may not be a perfect as it seems in terms of anything usefull IMO

Yes i moved to the darkside *happy*

Instagram @jdm_brett

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