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JimmyZ 07-07-2007 11:45 AM

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?

LEVE 07-07-2007 11:52 AM

Do you have a tach capable of reading 1000 RPM that you can see when you're tuning the carb?

JimmyZ 07-07-2007 12:46 PM

Yes. And a handheld large face vacuum gauge.

LEVE 07-07-2007 02:39 PM

Use the Vacuum Gauge

muddave44 07-07-2007 03:40 PM

Very nice rite up vacuum gauge. Thanks we all can use that.

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