Carb size ???? 383 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Venturi size: As pieceparts noted, a venturi that\'s too big just won\'t give you the throttle response you expect. In other carbs like Webers, you can change the venturi size...in Holleys and BGs, venturi size is based on CFM although you can adjust to some extent.
Secondary type: Vac secondaries for sure unless you\'re going drag racing <img src="http://67-72chevytrucks.com/vboard/images/smilies/smile.gif" border="0" alt="" title="Smilie" class="inlineimg" />

kenm78 · 12-30-2006, 10:53 PM

I am running a MSD ignition set-up the distributor was before tear down at ("bad speller please forgive me") 18 degrees mechanical advance inside the distributor and I playing with around 8-16 degrees initial timing I had a bad pinging when I started to play with the centrifical advance springs so i started running 91 and occationally heard the pre-ingnition so I tried our local sinclairs 93 and never heard the pre-ignition again "sounds like a bunch of rocks being tossed around inside the engine". but that is were I am so far. I rushed into the first build and as you can see I am paying double for every mistake. So Im not rushing this time...... Im still pondering on upgrading heads but that is anouther topic.. Thanks for your wisdom..

12-30-2006, 10:53 PM	#26
kenm78 Broken Down Join Date: Dec 2006 Location: Choctaw, Oklahoma Posts: 1,267	Re: Carb size ???? 383 I am running a MSD ignition set-up the distributor was before tear down at ("bad speller please forgive me") 18 degrees mechanical advance inside the distributor and I playing with around 8-16 degrees initial timing I had a bad pinging when I started to play with the centrifical advance springs so i started running 91 and occationally heard the pre-ingnition so I tried our local sinclairs 93 and never heard the pre-ignition again "sounds like a bunch of rocks being tossed around inside the engine". but that is were I am so far. I rushed into the first build and as you can see I am paying double for every mistake. So Im not rushing this time...... Im still pondering on upgrading heads but that is anouther topic.. Thanks for your wisdom.. __________________ kenm78 1982 Chevy 4X4 Project truck “It’s better to keep your mouth shut and let people wonder about your ignorance, than open your mouth and reveal all doubt”



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