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73-87 Chevy _ GMC Trucks => Performance => Topic started by: truckin2015 on October 04, 2016, 09:34:11 am

Title: Holley 4 barrel to a 2barrel
Post by: truckin2015 on October 04, 2016, 09:34:11 am

I HAVE AN 86 C10 350/ 350 turbo transmission . The carburetor is a holley 4 barrel which uses way to much gas . Can I convert this carburetor to a 2 barrel ? If so how .

Title: Re: Holley 4 barrel to a 2barrel
Post by: truckin2015 on October 04, 2016, 01:02:50 pm

1986 C10 Silverado

Title: Re: Holley 4 barrel to a 2barrel
Post by: VileZambonie on October 04, 2016, 04:16:27 pm

If you want to stay carbureted you should look into a quadrajet 4 barrel

Title: Re: Holley 4 barrel to a 2barrel
Post by: Stewart G Griffin on October 04, 2016, 07:30:02 pm

You could "convert" it to 2BBL by disconnecting the secondaries, but 4bbl to 2bbl has nothing to do with MPG (unless it's strictly a mechanical secondary carb, which i doubt)   What model holley DO you have?

2  four barrel carbs on an independent runner manifold could theoretically get as good if not better mpg than a single 4 barrel.

Rear axle ratio may be more important to mpg than carbs...