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Old 10-17-2009, 10:01 PM   #1
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Default why my new os 12tz spec2 smoke is so heavy?

anyone has idea of this will be appreciated

my new os 12tz spec2 (used 2 liter) even needle value is closed a lot, smoke from car start to high speed is so heavy.......


what may cause this?


i use cosmo 20% fuel,

thanks
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Old 10-18-2009, 11:46 AM   #2
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This behavior brings three questions to mind:
1. What is the oil content of your fuel?
2. What exhaust system are you using, it could be very restrictive?
3. How often have you tried to retune your engine from base settings?
4. What head shim thickness are you using?
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Old 10-19-2009, 08:23 AM   #3
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How lean is your low speed needle? You may have the low speed too rich and the high speed too lean trying to get less smoke.
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Old 10-19-2009, 03:55 PM   #4
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Quote:
Originally Posted by kakluote View Post
anyone has idea of this will be appreciated

my new os 12tz spec2 (used 2 liter) even needle value is closed a lot, smoke from car start to high speed is so heavy.......


what may cause this?


i use cosmo 20% fuel,

thanks
Same question I've answered in your two other posts on the engine section....go read there

AFM
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