Replies to this message are sent to The Chevelle Mailing List
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Ok, I'm intrigued. What exactly are you doing with the O2 sensor when doing
this? What do you have it hooked to, where is it installed, etc?Sounds like
an interesting way to tune your carb, especially since I have the Edelbrock
carb setup.
Jim Hanson
'70 Malibu
Team Chevelle #291
>From: Frank Evan Perdicaro <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: [EMAIL PROTECTED]
>Subject: Re: [Chevelle-List] Spark Plug Gap/Carb Setting
>Date: Fri, 20 Jul 2001 13:54:01 -0700
>
>
>Replies to this message are sent to The Chevelle Mailing List
>------------------------------------------------------------
>
> > I have a friend who trying to get a motor running,
> > it will run but not very well, the engine is a 1973
> > 454/245hp, the point ignition was removed, and a HEI
> > of unknown year installed, has the R44 small base
> > plugs installed, Chiltons shows anywhere from .045 to
> > .060 on the gap for electronic ignition any
> > suggestions on a setting.
>
>Does the HEI unit work well? Do the advance weights work right? Is it
>clean? Start with a 0.45 gap and go on from there.
>
> > Also the car has an Edelbrock carb, the only
> > numbers I can see are 1407-1322 stamped on the base in
> > front, the two needle seats in front, I need to know
> > where a good starting point would be, half turn, full
>
>The 1407 should work well with that engine.
>
>The best place to start is the local auto parts store.
>But a generic three wire oxygen sensor and a jet kit.
>The Edelbrock carbs have 6 circuits to tune
> Primary rod down
> Primary rod up
> Secondary
> Accelerator pump shot
> Rod springs
> Mixture screws
>
>The mixture screws are the last thing to play with.
>
>454/245 == Big displacement and mild cam/low compression. You want to
>run as lean as you can without surge. Tune for 0.52 volts on the
>oxygen sensor with the rod down, 0.63 rod up, and 0.68 on the secondary
>at 5000 RPM.
>
>
>
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