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Mixture screw question

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Old 03-18-10, 07:31 PM
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Mixture screw question
Which direction equals less fuel clockwise or counter?
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Old 03-18-10, 07:35 PM
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It should be labeled. I think Rich is clockwise and Lean is anticlockwise.
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Old 03-18-10, 07:44 PM
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less fuel is clockwise
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Old 03-18-10, 07:45 PM
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That's what I thought. Thanks
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Old 03-18-10, 07:49 PM
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Oh, never mind, I was thinking FI.
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Old 03-18-10, 07:51 PM
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Originally Posted by kutukutu1
less fuel is clockwise
Wait so when you turn the crew in clock wise as if you were trying to tighten it it's less fuel?
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Old 03-18-10, 08:33 PM
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Yes, clockwise (toward firewall) less fuel. Make sure the carb has had time to warm up.
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Old 03-18-10, 09:05 PM
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Ok cool thanks guys
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Old 03-18-10, 10:04 PM
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You need a haynes manual or something...
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Old 03-18-10, 11:51 PM
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Originally Posted by JoeNoble
Wait so when you turn the crew in clock wise as if you were trying to tighten it it's less fuel?
its a fuel passage, so tighten the screw = smaller passage = less fuel
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Old 03-19-10, 01:16 PM
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There used to be two screws. They eliminated the air adjust screw on later Nikkis, like yours, so that screw only adjusts fuel.
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Old 03-19-10, 01:37 PM
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Originally Posted by Jeff20B
There used to be two screws. They eliminated the air adjust screw on later Nikkis, like yours, so that screw only adjusts fuel.
My engines a 79
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Old 03-19-10, 02:09 PM
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Top screw on a 79 is idle airflow (open to increase air equals faster idle & leaner mix)

Bottom screw is fuel mix (close to decrease fuel equals leaner, but not as much effect on idle)

Joe, us SA owners always have to let people know we're dealing with an SA. Many engine-management details changed from 79 & 80 to 81.
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Old 03-19-10, 02:20 PM
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Originally Posted by DivinDriver
Top screw on a 79 is idle airflow (open to increase air equals faster idle & leaner mix)

Bottom screw is fuel mix (close to decrease fuel equals leaner, but not as much effect on idle)

Joe, us SA owners always have to let people know we're dealing with an SA. Many engine-management details changed from 79 & 80 to 81.
My bad this is my first sa engine on account of the fact that I'm not a huge fan of the sa bodies but my 79 engine is in an 83 s model with an 85 gsl rear end
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Old 03-19-10, 02:28 PM
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Oh, sorry I should have known that.
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Old 03-19-10, 02:34 PM
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Not sure how you couldve known however when it comes to 1st gens you can't assume it has the engine it came with 20 somethin years ago either lol
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Old 03-19-10, 05:29 PM
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Originally Posted by JoeNoble
my 79 engine is in an 83 s model with an 85 gsl rear end
"You built a time machine... in a FIRST GEN??"

Your car gets younger as it drives past!
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Old 03-19-10, 05:32 PM
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Originally Posted by DivinDriver
"You built a time machine... in a FIRST GEN??"

Your car gets younger as it drives past!
Well to be honest that's how it was when I bought it from firebirdslayer666 but yeah pretty much
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Old 03-19-10, 05:33 PM
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So do I still turn the top screw till it revs at 750 then turn the bottom one?
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Old 03-20-10, 12:28 AM
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Originally Posted by Dcashdollar
You need a haynes manual or something...
agreed. Not trying to be a dick but these questions have been asked over and over. Get a manual and spend some time on www.sterlingmetalworks.com The search button and archives are awesome too.
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