Engine/Carb Tune - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 07-07-2007, 11:45 AM Thread Starter
Can't Get Enough
 
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Engine/Carb Tune

258, non-stepper motor BBD, Duraspark. Let me see if I got this straight.......Warm up engine. Remove and plug vacuum line from distributor. Set timing. Reconnect vacuum advance line. Set rpm. Adjust each idle mixture screw, within 1/4 turn of each other, for highest vacuum. Back off 1 inch for best emissions. Or screw in-make lean for a 50 rpm drop. Readjust idle. ????????? Yes? No?

Today's mighty oak is just yesterday's nut that held its ground!
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post #2 of (permalink) Old 07-07-2007, 11:52 AM
Way Outta Control
 
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Do you have a tach capable of reading 1000 RPM that you can see when you're tuning the carb?
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post #3 of (permalink) Old 07-07-2007, 12:46 PM Thread Starter
Can't Get Enough
 
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Yes. And a handheld large face vacuum gauge.

Today's mighty oak is just yesterday's nut that held its ground!
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post #4 of (permalink) Old 07-07-2007, 02:39 PM
Way Outta Control
 
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Use the Vacuum Gauge
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post #5 of (permalink) Old 07-07-2007, 03:40 PM
 
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Very nice rite up vacuum gauge. Thanks we all can use that.
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