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Mixture setting - K-Jetronic, CO value

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Old Jun 5, 2006 | 08:23 PM
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Default Mixture setting - K-Jetronic, CO value

Hello!

If I do not have the opportunity to measure my mixture settings with a lambda sensor, can I do an approximate control by measuring the emission values (CO)?

It's an XR3i K-Jetronic with about 10:1 comp. ratio, and a 288/280 camshaft. Can we know what CO value shoud I get...?

Thanks!
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Old Jun 7, 2006 | 05:45 PM
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go to any MOT testing station and get em to set it to 1.7%ish, if you have the time, and they have the patience, try it at 1.3, 1.7 and about 2% and see where it feels strongest then tweak from there, get ign timing set to 12-14deg BTDC and run it on good fuel and it should go pretty well
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Old Jun 7, 2006 | 06:34 PM
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Originally Posted by sexr3i
go to any MOT testing station and get em to set it to 1.7%ish, if you have the time, and they have the patience, try it at 1.3, 1.7 and about 2% and see where it feels strongest then tweak from there, get ign timing set to 12-14deg BTDC and run it on good fuel and it should go pretty well
Ignition already set to 12deg, I'll try the other settings as well.

Thanks for your answer.
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Old Jun 9, 2006 | 01:46 AM
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Originally Posted by Schmidi
Originally Posted by sexr3i
go to any MOT testing station and get em to set it to 1.7%ish, if you have the time, and they have the patience, try it at 1.3, 1.7 and about 2% and see where it feels strongest then tweak from there, get ign timing set to 12-14deg BTDC and run it on good fuel and it should go pretty well
Ignition already set to 12deg, I'll try the other settings as well.

Thanks for your answer.
std ignition curve??
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Old Jun 9, 2006 | 01:53 AM
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how is driving around town? a lot diferent from std (not racing of course! )

im think on modding mine just like you did, so ive got to ask!!

thanx mate
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Old Jun 12, 2006 | 03:36 PM
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can anyone give me an answer???
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Old Jun 12, 2006 | 03:51 PM
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Nothing has been modified on the ignition (yet)
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Old Jun 12, 2006 | 07:13 PM
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how is driving around town? a lot diferent from std?????
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Old Jun 12, 2006 | 08:27 PM
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Originally Posted by paconassa
how is driving around town? a lot diferent from std?????
What exactly do you mean by this?
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Old Jun 12, 2006 | 11:28 PM
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Originally Posted by Schmidi
Originally Posted by paconassa
how is driving around town? a lot diferent from std?????
What exactly do you mean by this?
if it is more dificul to drive (with less power at lower rpm (1000-2000))...

and how much a difference is at higher rpm (4000-6500)...
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Old Jun 13, 2006 | 09:33 AM
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Originally Posted by paconassa
Originally Posted by Schmidi
Originally Posted by paconassa
how is driving around town? a lot diferent from std?????
What exactly do you mean by this?
if it is more dificul to drive (with less power at lower rpm (1000-2000))...
and how much a difference is at higher rpm (4000-6500)...
It's recommended to use an adjustable cam pulley. I run a few weeks with the original pulley, in this case it loses power under 3500-4000.

After installing and setting the adjustable pulley it's getting much enjoyable.
Under 3000 it's normally driveable, no problem even in the city, at the lamps, etc. If you rev it over 3500, there you can feel the difference between the stock and the tuning cam. It's much more powerful, and with the ported head and stock intake it has a fascinating sound
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Old Jun 13, 2006 | 09:16 PM
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thanks for the help mate!!!!

if any new news or mods send me a message!!!

Good Luck mate
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Old Jun 14, 2006 | 07:56 PM
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another question... how is the fuel consumption???
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Old Jun 15, 2006 | 12:43 PM
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Originally Posted by paconassa
another question... how is the fuel consumption???
With the proper setting of the mixture it's not much different from as a factory spec. engine.
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Old Jun 17, 2006 | 06:05 PM
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do you have a schrick cam or cam kit?

std lifters?

std valve strings?
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Old Jun 17, 2006 | 06:58 PM
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Yes it's a Schrick cam, with the standard hydraulic lifters and springs.
(You don't need to change the springs with the valve lift of this cam, and if you do not want to rev it above 6000 the hydraulic lifters will do as well.)
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Old Jun 22, 2006 | 11:54 PM
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how much was the cam? price in € or £ would be nice...
they asked me 400€!!!!!!! its 245€ from schrick (excluding vat...)

any update or pics of the mods until now??
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Old Jun 23, 2006 | 07:28 AM
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Originally Posted by paconassa
how much was the cam? price in € or £ would be nice...
they asked me 400€!!!!!!! its 245€ from schrick (excluding vat...)

any update or pics of the mods until now??
Let's continue here: https://passionford.com/forum/viewtopic.php?t=199133
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